Core/Misc: Refactor scripts to fix static analysis warnings

Fourth batch of fixes targeting 100 issues reported by Coverity

59 files changed, 767 insertions, 265 deletions

diff --git a/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_chromaggus.cpp b/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_chromaggus.cpp
index 1a97f668558..9a6d0e9c224 100644
--- a/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_chromaggus.cpp
+++ b/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_chromaggus.cpp
@@ -75,6 +75,9 @@ public:
         {
             Initialize();
 
+            Breath1_Spell = 0;
+            Breath2_Spell = 0;
+
             // Select the 2 breaths that we are going to use until despawned
             // 5 possiblities for the first breath, 4 for the second, 20 total possiblites
             // This way we don't end up casting 2 of the same breath
diff --git a/src/server/scripts/EasternKingdoms/Karazhan/boss_nightbane.cpp b/src/server/scripts/EasternKingdoms/Karazhan/boss_nightbane.cpp
index 9084a6b0371..7ce11653567 100644
--- a/src/server/scripts/EasternKingdoms/Karazhan/boss_nightbane.cpp
+++ b/src/server/scripts/EasternKingdoms/Karazhan/boss_nightbane.cpp
@@ -81,6 +81,9 @@ public:
             Initialize();
             instance = creature->GetInstanceScript();
             Intro = true;
+            RainBones = false;
+            Skeletons = false;
+            FlyTimer = 0;
         }
 
         void Initialize()
diff --git a/src/server/scripts/EasternKingdoms/Karazhan/bosses_opera.cpp b/src/server/scripts/EasternKingdoms/Karazhan/bosses_opera.cpp
index ce8223c90cf..7b51b61ba0a 100644
--- a/src/server/scripts/EasternKingdoms/Karazhan/bosses_opera.cpp
+++ b/src/server/scripts/EasternKingdoms/Karazhan/bosses_opera.cpp
@@ -1068,6 +1068,7 @@ public:
             EntryYellTimer = 1000;
             AggroYellTimer = 10000;
             IsFakingDeath = false;
+            ResurrectTimer = 0;
         }
 
         void Initialize()
diff --git a/src/server/scripts/EasternKingdoms/ScarletMonastery/boss_headless_horseman.cpp b/src/server/scripts/EasternKingdoms/ScarletMonastery/boss_headless_horseman.cpp
index 307bcd5add6..0733640f4c3 100644
--- a/src/server/scripts/EasternKingdoms/ScarletMonastery/boss_headless_horseman.cpp
+++ b/src/server/scripts/EasternKingdoms/ScarletMonastery/boss_headless_horseman.cpp
@@ -391,6 +391,10 @@ public:
             Initialize();
             instance = creature->GetInstanceScript();
             headGUID = 0;
+            PlayerGUID = 0;
+            id = 0;
+            whirlwind = 0;
+            wp_reached = false;
         }
 
         void Initialize()
diff --git a/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_kiljaeden.cpp b/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_kiljaeden.cpp
index 5df2d683e21..79ebfa7b62b 100644
--- a/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_kiljaeden.cpp
+++ b/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_kiljaeden.cpp
@@ -503,6 +503,7 @@ public:
         {
             Initialize();
             instance = creature->GetInstanceScript();
+            speechPhaseEnd = 0;
 
             SetCombatMovement(false);
         }
diff --git a/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp b/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp
index ec0bae0f27f..823423fc3a8 100644
--- a/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp
+++ b/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp
@@ -301,10 +301,19 @@ public:
     {
         npc_muru_portalAI(Creature* creature) : ScriptedAI(creature), Summons(creature)
         {
+            Initialize();
             SetCombatMovement(false);
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            SummonTimer = 5000;
+
+            InAction = false;
+            SummonSentinel = false;
+        }
+
         InstanceScript* instance;
 
         SummonList Summons;
@@ -316,10 +325,7 @@ public:
 
         void Reset() override
         {
-            SummonTimer = 5000;
-
-            InAction = false;
-            SummonSentinel = false;
+            Initialize();
 
             me->AddUnitState(UNIT_STATE_STUNNED);
 
@@ -383,15 +389,23 @@ public:
 
     struct npc_dark_fiendAI : public ScriptedAI
     {
-        npc_dark_fiendAI(Creature* creature) : ScriptedAI(creature) { }
+        npc_dark_fiendAI(Creature* creature) : ScriptedAI(creature)
+        {
+            Initialize();
+        }
+
+        void Initialize()
+        {
+            WaitTimer = 2000;
+            InAction = false;
+        }
 
         uint32 WaitTimer;
         bool InAction;
 
         void Reset() override
         {
-            WaitTimer = 2000;
-            InAction = false;
+            Initialize();
 
             me->AddUnitState(UNIT_STATE_STUNNED);
         }
@@ -444,15 +458,23 @@ public:
 
     struct npc_void_sentinelAI : public ScriptedAI
     {
-        npc_void_sentinelAI(Creature* creature) : ScriptedAI(creature) { }
+        npc_void_sentinelAI(Creature* creature) : ScriptedAI(creature)
+        {
+            Initialize();
+        }
+
+        void Initialize()
+        {
+            PulseTimer = 3000;
+            VoidBlastTimer = 45000; //is this a correct timer?
+        }
 
         uint32 PulseTimer;
         uint32 VoidBlastTimer;
 
         void Reset() override
         {
-            PulseTimer = 3000;
-            VoidBlastTimer = 45000; //is this a correct timer?
+            Initialize();
 
             float x, y, z, o;
             me->GetHomePosition(x, y, z, o);
@@ -502,9 +524,18 @@ public:
     {
         npc_blackholeAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            DespawnTimer = 15000;
+            SpellTimer = 5000;
+            Phase = 0;
+            NeedForAHack = 0;
+        }
+
         InstanceScript* instance;
 
         uint32 DespawnTimer;
@@ -514,10 +545,7 @@ public:
 
         void Reset() override
         {
-            DespawnTimer = 15000;
-            SpellTimer = 5000;
-            Phase = 0;
-            NeedForAHack = 0;
+            Initialize();
 
             me->AddUnitState(UNIT_STATE_STUNNED);
             DoCastAOE(SPELL_BLACKHOLE_SPAWN, true);
diff --git a/src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/hyjalAI.cpp b/src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/hyjalAI.cpp
index 34b55da72de..a7fa54b12e1 100644
--- a/src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/hyjalAI.cpp
+++ b/src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/hyjalAI.cpp
@@ -335,6 +335,7 @@ hyjalAI::hyjalAI(Creature* creature) : npc_escortAI(creature), Summons(me)
     DoRespawn = false;
     MassTeleportTimer = 0;
     DoMassTeleport = false;
+    DummyGuid = 0;
 }
 
 void hyjalAI::Initialize()
diff --git a/src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_fankriss.cpp b/src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_fankriss.cpp
index a98f3843d97..b916f93aef7 100644
--- a/src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_fankriss.cpp
+++ b/src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_fankriss.cpp
@@ -69,9 +69,6 @@ public:
         uint32 SpawnHatchlings_Timer;
         uint32 SpawnSpawns_Timer;
 
-        Creature* Hatchling;
-        Creature* Spawn;
-
         void Reset() override
         {
             Initialize();
@@ -99,7 +96,7 @@ public:
                 case 1: RandY = 0.0f + Rand; break;
             }
             Rand = 0;
-            Spawn = DoSpawnCreature(15630, RandX, RandY, 0, 0, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 30000);
+            Creature* Spawn = DoSpawnCreature(15630, RandX, RandY, 0, 0, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 30000);
             if (Spawn)
                 Spawn->AI()->AttackStart(victim);
         }
@@ -155,6 +152,7 @@ public:
                         if (DoGetThreat(target))
                             DoModifyThreatPercent(target, -100);
 
+                        Creature* Hatchling = nullptr;
                         switch (urand(0, 2))
                         {
                             case 0:
@@ -174,7 +172,7 @@ public:
                                 break;
                             case 1:
                                 DoTeleportPlayer(target, -7990.135354f, 1155.1907f, -78.849319f, 2.608f);
-                                Hatchling = me->SummonCreature(15962, target->GetPositionX()-3, target->GetPositionY()-3, target->GetPositionZ(), 0, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 15000);
+                                Hatchling = me->SummonCreature(15962, target->GetPositionX() - 3, target->GetPositionY() - 3, target->GetPositionZ(), 0, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 15000);
                                 if (Hatchling)
                                     Hatchling->AI()->AttackStart(target);
                                 Hatchling = me->SummonCreature(15962, target->GetPositionX()-3, target->GetPositionY()+3, target->GetPositionZ(), 0, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 15000);
@@ -189,7 +187,7 @@ public:
                                 break;
                             case 2:
                                 DoTeleportPlayer(target, -8159.7753f, 1127.9064f, -76.868660f, 0.675f);
-                                Hatchling = me->SummonCreature(15962, target->GetPositionX()-3, target->GetPositionY()-3, target->GetPositionZ(), 0, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 15000);
+                                Hatchling = me->SummonCreature(15962, target->GetPositionX() - 3, target->GetPositionY() - 3, target->GetPositionZ(), 0, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 15000);
                                 if (Hatchling)
                                     Hatchling->AI()->AttackStart(target);
                                 Hatchling = me->SummonCreature(15962, target->GetPositionX()-3, target->GetPositionY()+3, target->GetPositionZ(), 0, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 15000);
diff --git a/src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_twinemperors.cpp b/src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_twinemperors.cpp
index cd250a50fb7..e65dbacc1f2 100644
--- a/src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_twinemperors.cpp
+++ b/src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_twinemperors.cpp
@@ -417,8 +417,6 @@ public:
         uint32 UnbalancingStrike_Timer;
         uint32 Scarabs_Timer;
 
-        Creature* Summoned;
-
         void Reset() override
         {
             TwinReset();
@@ -509,8 +507,6 @@ public:
         uint32 ArcaneBurst_Timer;
         uint32 Scorpions_Timer;
 
-        Creature* Summoned;
-
         void Reset() override
         {
             TwinReset();
diff --git a/src/server/scripts/Northrend/ChamberOfAspects/ObsidianSanctum/obsidian_sanctum.cpp b/src/server/scripts/Northrend/ChamberOfAspects/ObsidianSanctum/obsidian_sanctum.cpp
index 0a712b69771..58d7c6141b4 100644
--- a/src/server/scripts/Northrend/ChamberOfAspects/ObsidianSanctum/obsidian_sanctum.cpp
+++ b/src/server/scripts/Northrend/ChamberOfAspects/ObsidianSanctum/obsidian_sanctum.cpp
@@ -161,19 +161,25 @@ struct dummy_dragonAI : public ScriptedAI
 {
     dummy_dragonAI(Creature* creature) : ScriptedAI(creature)
     {
+        Initialize();
         instance = creature->GetInstanceScript();
     }
 
+    void Initialize()
+    {
+        waypointId = 0;
+        portalRespawnTime = 30000;
+        _canMoveFree = false;
+        _canLoot = true;
+    }
+
     void Reset() override
     {
         if (me->HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE))
             me->RemoveFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE);
 
         events.Reset();
-        waypointId = 0;
-        portalRespawnTime = 30000;
-        _canMoveFree = false;
-        _canLoot = true;
+        Initialize();
     }
 
     void EnterCombat(Unit* /*who*/) override
diff --git a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_baltharus_the_warborn.cpp b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_baltharus_the_warborn.cpp
index 0c96a982997..4e02b3ad2e8 100644
--- a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_baltharus_the_warborn.cpp
+++ b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_baltharus_the_warborn.cpp
@@ -73,15 +73,21 @@ class boss_baltharus_the_warborn : public CreatureScript
         {
             boss_baltharus_the_warbornAI(Creature* creature) : BossAI(creature, DATA_BALTHARUS_THE_WARBORN)
             {
+                Initialize();
                 _introDone = false;
             }
 
+            void Initialize()
+            {
+                _cloneCount = RAID_MODE<uint8>(1, 2, 2, 2);
+            }
+
             void Reset() override
             {
                 _Reset();
                 events.SetPhase(PHASE_INTRO);
                 events.ScheduleEvent(EVENT_OOC_CHANNEL, 0, 0, PHASE_INTRO);
-                _cloneCount = RAID_MODE<uint8>(1, 2, 2, 2);
+                Initialize();
                 instance->SetData(DATA_BALTHARUS_SHARED_HEALTH, me->GetMaxHealth());
             }
 
diff --git a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_general_zarithrian.cpp b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_general_zarithrian.cpp
index b5c20e95278..e41ea8de38b 100644
--- a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_general_zarithrian.cpp
+++ b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_general_zarithrian.cpp
@@ -204,12 +204,18 @@ class npc_onyx_flamecaller : public CreatureScript
         {
             npc_onyx_flamecallerAI(Creature* creature) : npc_escortAI(creature), _instance(creature->GetInstanceScript())
             {
+                Initialize();
                 npc_escortAI::SetDespawnAtEnd(false);
             }
 
-            void Reset() override
+            void Initialize()
             {
                 _lavaGoutCount = 0;
+            }
+
+            void Reset() override
+            {
+                Initialize();
                 me->setActive(true);
                 AddWaypoints();
                 Start(true, true);
diff --git a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_halion.cpp b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_halion.cpp
index d08c6f66903..dbf3a185120 100644
--- a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_halion.cpp
+++ b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_halion.cpp
@@ -596,16 +596,22 @@ class npc_halion_controller : public CreatureScript
             npc_halion_controllerAI(Creature* creature) : ScriptedAI(creature),
                 _instance(creature->GetInstanceScript()), _summons(me)
             {
+                Initialize();
                 me->SetPhaseMask(me->GetPhaseMask() | 0x20, true);
             }
 
-            void Reset() override
+            void Initialize()
             {
-                _summons.DespawnAll();
-                _events.Reset();
                 _materialCorporealityValue = 5;
                 _materialDamageTaken = 0;
                 _twilightDamageTaken = 0;
+            }
+
+            void Reset() override
+            {
+                _summons.DespawnAll();
+                _events.Reset();
+                Initialize();
 
                 DoCast(me, SPELL_CLEAR_DEBUFFS);
             }
@@ -1208,13 +1214,22 @@ class npc_living_ember : public CreatureScript
 
         struct npc_living_emberAI : public ScriptedAI
         {
-            npc_living_emberAI(Creature* creature) : ScriptedAI(creature) { }
+            npc_living_emberAI(Creature* creature) : ScriptedAI(creature)
+            {
+                Initialize();
+                _enrageTimer = 0;
+            }
 
-            void Reset() override
+            void Initialize()
             {
                 _hasEnraged = false;
             }
 
+            void Reset() override
+            {
+                Initialize();
+            }
+
             void EnterCombat(Unit* /*who*/) override
             {
                 _enrageTimer = 20000;
diff --git a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/instance_ruby_sanctum.cpp b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/instance_ruby_sanctum.cpp
index 28bf3a3d531..be756a8ab36 100644
--- a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/instance_ruby_sanctum.cpp
+++ b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/instance_ruby_sanctum.cpp
@@ -54,6 +54,7 @@ class instance_ruby_sanctum : public InstanceMapScript
                 BaltharusSharedHealth    = 0;
                 FlameWallsGUID           = 0;
                 FlameRingGUID            = 0;
+                TwilightFlameRingGUID    = 0;
 
                 memset(ZarithrianSpawnStalkerGUID, 0, 2 * sizeof(uint64));
                 memset(BurningTreeGUID, 0, 4 * sizeof(uint64));
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_argent_challenge.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_argent_challenge.cpp
index 7e9e351ae9c..f2d2c3e3d5b 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_argent_challenge.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_argent_challenge.cpp
@@ -156,11 +156,22 @@ public:
     {
         boss_eadricAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
             creature->SetReactState(REACT_PASSIVE);
             creature->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE);
         }
 
+        void Initialize()
+        {
+            uiVenganceTimer = 10000;
+            uiRadianceTimer = 16000;
+            uiHammerJusticeTimer = 25000;
+            uiResetTimer = 5000;
+
+            bDone = false;
+        }
+
         InstanceScript* instance;
 
         uint32 uiVenganceTimer;
@@ -172,12 +183,7 @@ public:
 
         void Reset() override
         {
-            uiVenganceTimer = 10000;
-            uiRadianceTimer = 16000;
-            uiHammerJusticeTimer = 25000;
-            uiResetTimer = 5000;
-
-            bDone = false;
+            Initialize();
         }
 
         void DamageTaken(Unit* /*done_by*/, uint32 &damage) override
@@ -260,6 +266,7 @@ public:
     {
         boss_paletressAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
 
             MemoryGUID = 0;
@@ -268,6 +275,18 @@ public:
             creature->RestoreFaction();
         }
 
+        void Initialize()
+        {
+            uiHolyFireTimer = urand(9000, 12000);
+            uiHolySmiteTimer = urand(5000, 7000);
+            uiRenewTimer = urand(2000, 5000);
+
+            uiResetTimer = 7000;
+
+            bHealth = false;
+            bDone = false;
+        }
+
         InstanceScript* instance;
         uint64 MemoryGUID;
 
@@ -283,14 +302,7 @@ public:
         {
             me->RemoveAllAuras();
 
-            uiHolyFireTimer     = urand(9000, 12000);
-            uiHolySmiteTimer    = urand(5000, 7000);
-            uiRenewTimer        = urand(2000, 5000);
-
-            uiResetTimer        = 7000;
-
-            bHealth = false;
-            bDone = false;
+            Initialize();
 
             if (Creature* pMemory = ObjectAccessor::GetCreature(*me, MemoryGUID))
                 if (pMemory->IsAlive())
@@ -415,7 +427,17 @@ public:
 
     struct npc_memoryAI : public ScriptedAI
     {
-        npc_memoryAI(Creature* creature) : ScriptedAI(creature) { }
+        npc_memoryAI(Creature* creature) : ScriptedAI(creature)
+        {
+            Initialize();
+        }
+
+        void Initialize()
+        {
+            uiOldWoundsTimer = 12000;
+            uiShadowPastTimer = 5000;
+            uiWakingNightmare = 7000;
+        }
 
         uint32 uiOldWoundsTimer;
         uint32 uiShadowPastTimer;
@@ -423,9 +445,7 @@ public:
 
         void Reset() override
         {
-            uiOldWoundsTimer = 12000;
-            uiShadowPastTimer = 5000;
-            uiWakingNightmare = 7000;
+            Initialize();
         }
 
         void UpdateAI(uint32 uiDiff) override
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_black_knight.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_black_knight.cpp
index a8aff70b034..e342b3bbfb1 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_black_knight.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_black_knight.cpp
@@ -83,9 +83,31 @@ public:
     {
         boss_black_knightAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            bEventInProgress = false;
+            bEvent = false;
+            bSummonArmy = false;
+            bDeathArmyDone = false;
+
+            uiPhase = PHASE_UNDEAD;
+
+            uiIcyTouchTimer = urand(5000, 9000);
+            uiPlagueStrikeTimer = urand(10000, 13000);
+            uiDeathRespiteTimer = urand(15000, 16000);
+            uiObliterateTimer = urand(17000, 19000);
+            uiDesecration = urand(15000, 16000);
+            uiDeathArmyCheckTimer = 7000;
+            uiResurrectTimer = 4000;
+            uiGhoulExplodeTimer = 8000;
+            uiDeathBiteTimer = urand(2000, 4000);
+            uiMarkedDeathTimer = urand(5000, 7000);
+        }
+
         InstanceScript* instance;
 
         std::list<uint64> SummonList;
@@ -114,23 +136,7 @@ public:
             me->SetDisplayId(me->GetNativeDisplayId());
             me->ClearUnitState(UNIT_STATE_ROOT | UNIT_STATE_STUNNED);
 
-            bEventInProgress = false;
-            bEvent = false;
-            bSummonArmy = false;
-            bDeathArmyDone = false;
-
-            uiPhase = PHASE_UNDEAD;
-
-            uiIcyTouchTimer = urand(5000, 9000);
-            uiPlagueStrikeTimer = urand(10000, 13000);
-            uiDeathRespiteTimer = urand(15000, 16000);
-            uiObliterateTimer = urand(17000, 19000);
-            uiDesecration = urand(15000, 16000);
-            uiDeathArmyCheckTimer = 7000;
-            uiResurrectTimer = 4000;
-            uiGhoulExplodeTimer = 8000;
-            uiDeathBiteTimer = urand(2000, 4000);
-            uiMarkedDeathTimer = urand(5000, 7000);
+            Initialize();
         }
 
         void RemoveSummons()
@@ -310,13 +316,21 @@ public:
 
     struct npc_risen_ghoulAI : public ScriptedAI
     {
-        npc_risen_ghoulAI(Creature* creature) : ScriptedAI(creature) { }
+        npc_risen_ghoulAI(Creature* creature) : ScriptedAI(creature)
+        {
+            Initialize();
+        }
+
+        void Initialize()
+        {
+            uiAttackTimer = 3500;
+        }
 
         uint32 uiAttackTimer;
 
         void Reset() override
         {
-            uiAttackTimer = 3500;
+            Initialize();
         }
 
         void UpdateAI(uint32 uiDiff) override
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_grand_champions.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_grand_champions.cpp
index 7dd935e86f0..027238be6d3 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_grand_champions.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/boss_grand_champions.cpp
@@ -155,12 +155,20 @@ public:
     {
         generic_vehicleAI_toc5AI(Creature* creature) : npc_escortAI(creature)
         {
+            Initialize();
             SetDespawnAtEnd(false);
             uiWaypointPath = 0;
 
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            uiChargeTimer = 5000;
+            uiShieldBreakerTimer = 8000;
+            uiBuffTimer = urand(30000, 60000);
+        }
+
         InstanceScript* instance;
 
         uint32 uiChargeTimer;
@@ -171,9 +179,7 @@ public:
 
         void Reset() override
         {
-            uiChargeTimer = 5000;
-            uiShieldBreakerTimer = 8000;
-            uiBuffTimer = urand(30000, 60000);
+            Initialize();
         }
 
         void SetData(uint32 uiType, uint32 /*uiData*/) override
@@ -311,6 +317,7 @@ public:
     {
         boss_warrior_toc5AI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
 
             bDone = false;
@@ -324,6 +331,13 @@ public:
             me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_IMMUNE_TO_PC);
         }
 
+        void Initialize()
+        {
+            uiBladeStormTimer = urand(15000, 20000);
+            uiInterceptTimer = 7000;
+            uiMortalStrikeTimer = urand(8000, 12000);
+        }
+
         InstanceScript* instance;
 
         uint8 uiPhase;
@@ -339,9 +353,7 @@ public:
 
         void Reset() override
         {
-            uiBladeStormTimer = urand(15000, 20000);
-            uiInterceptTimer  = 7000;
-            uiMortalStrikeTimer = urand(8000, 12000);
+            Initialize();
         }
 
         void JustReachedHome() override
@@ -443,6 +455,7 @@ public:
     {
         boss_mage_toc5AI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
 
             bDone = false;
@@ -456,6 +469,14 @@ public:
             me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_IMMUNE_TO_PC);
         }
 
+        void Initialize()
+        {
+            uiFireBallTimer = 5000;
+            uiPolymorphTimer = 8000;
+            uiBlastWaveTimer = 12000;
+            uiHasteTimer = 22000;
+        }
+
         InstanceScript* instance;
 
         uint8 uiPhase;
@@ -471,10 +492,7 @@ public:
 
         void Reset() override
         {
-            uiFireBallTimer = 5000;
-            uiPolymorphTimer  = 8000;
-            uiBlastWaveTimer = 12000;
-            uiHasteTimer = 22000;
+            Initialize();
         }
 
         void JustReachedHome() override
@@ -580,6 +598,7 @@ public:
     {
         boss_shaman_toc5AI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
 
             bDone = false;
@@ -593,6 +612,14 @@ public:
             me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_IMMUNE_TO_PC);
         }
 
+        void Initialize()
+        {
+            uiChainLightningTimer = 16000;
+            uiHealingWaveTimer = 12000;
+            uiEartShieldTimer = urand(30000, 35000);
+            uiHexMendingTimer = urand(20000, 25000);
+        }
+
         InstanceScript* instance;
 
         uint8 uiPhase;
@@ -608,10 +635,7 @@ public:
 
         void Reset() override
         {
-            uiChainLightningTimer = 16000;
-            uiHealingWaveTimer = 12000;
-            uiEartShieldTimer = urand(30000, 35000);
-            uiHexMendingTimer = urand(20000, 25000);
+            Initialize();
         }
 
         void EnterCombat(Unit* who) override
@@ -725,6 +749,7 @@ public:
     {
         boss_hunter_toc5AI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
 
             bDone = false;
@@ -738,6 +763,17 @@ public:
             me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_IMMUNE_TO_PC);
         }
 
+        void Initialize()
+        {
+            uiShootTimer = 12000;
+            uiMultiShotTimer = 0;
+            uiLightningArrowsTimer = 7000;
+
+            uiTargetGUID = 0;
+
+            bShoot = false;
+        }
+
         InstanceScript* instance;
 
         uint8 uiPhase;
@@ -755,13 +791,7 @@ public:
 
         void Reset() override
         {
-            uiShootTimer = 12000;
-            uiMultiShotTimer = 0;
-            uiLightningArrowsTimer = 7000;
-
-            uiTargetGUID = 0;
-
-            bShoot = false;
+            Initialize();
         }
 
         void JustReachedHome() override
@@ -879,6 +909,7 @@ public:
     {
         boss_rouge_toc5AI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
 
             bDone = false;
@@ -892,6 +923,13 @@ public:
             me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_IMMUNE_TO_PC);
         }
 
+        void Initialize()
+        {
+            uiEviscerateTimer = 8000;
+            uiFanKivesTimer = 14000;
+            uiPosionBottleTimer = 19000;
+        }
+
         InstanceScript* instance;
 
         uint8 uiPhase;
@@ -905,9 +943,7 @@ public:
 
         void Reset() override
         {
-            uiEviscerateTimer = 8000;
-            uiFanKivesTimer   = 14000;
-            uiPosionBottleTimer = 19000;
+            Initialize();
         }
 
         void JustReachedHome() override
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/trial_of_the_champion.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/trial_of_the_champion.cpp
index e0930a1ae2e..e073d08ef1d 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/trial_of_the_champion.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheChampion/trial_of_the_champion.cpp
@@ -115,8 +115,6 @@ public:
         uint64 uiVehicle2GUID;
         uint64 uiVehicle3GUID;
 
-        uint64 uiGrandChampionBoss1;
-
         std::list<uint64> Champion1List;
         std::list<uint64> Champion2List;
         std::list<uint64> Champion3List;
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_anubarak_trial.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_anubarak_trial.cpp
index 7af55ec37ea..2f29e03a2f2 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_anubarak_trial.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_anubarak_trial.cpp
@@ -166,6 +166,13 @@ class boss_anubarak_trial : public CreatureScript
         {
             boss_anubarak_trialAI(Creature* creature) : BossAI(creature, BOSS_ANUBARAK)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _intro = true;
+                _reachedPhase3 = false;
             }
 
             void Reset() override
@@ -183,8 +190,7 @@ class boss_anubarak_trial : public CreatureScript
                 if (!IsHeroic())
                     events.ScheduleEvent(EVENT_SUMMON_FROST_SPHERE, 20*IN_MILLISECONDS);
 
-                _intro = true;
-                _reachedPhase3 = false;
+                Initialize();
                 me->RemoveFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_NOT_SELECTABLE);
                 // clean up spawned Frost Spheres
                 std::list<Creature*> FrostSphereList;
@@ -436,13 +442,19 @@ class npc_swarm_scarab : public CreatureScript
         {
             npc_swarm_scarabAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
                 _instance = creature->GetInstanceScript();
             }
 
+            void Initialize()
+            {
+                _determinationTimer = urand(5 * IN_MILLISECONDS, 60 * IN_MILLISECONDS);
+            }
+
             void Reset() override
             {
                 me->SetCorpseDelay(0);
-                _determinationTimer = urand(5*IN_MILLISECONDS, 60*IN_MILLISECONDS);
+                Initialize();
                 DoCast(me, SPELL_ACID_MANDIBLE);
                 me->SetInCombatWithZone();
                 if (me->IsInCombat())
@@ -508,13 +520,19 @@ class npc_nerubian_burrower : public CreatureScript
         {
             npc_nerubian_burrowerAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
                 _instance = creature->GetInstanceScript();
             }
 
+            void Initialize()
+            {
+                _submergeTimer = 30 * IN_MILLISECONDS;
+            }
+
             void Reset() override
             {
                 me->SetCorpseDelay(10);
-                _submergeTimer = 30*IN_MILLISECONDS;
+                Initialize();
                 DoCast(me, SPELL_EXPOSE_WEAKNESS);
                 DoCast(me, SPELL_SPIDER_FRENZY);
                 DoCast(me, SPELL_AWAKENED);
@@ -669,12 +687,18 @@ class npc_anubarak_spike : public CreatureScript
         {
             npc_anubarak_spikeAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
             }
 
-            void Reset() override
+            void Initialize()
             {
                 _phase = PHASE_NO_MOVEMENT;
                 _phaseSwitchTimer = 1;
+            }
+
+            void Reset() override
+            {
+                Initialize();
                 // make sure the spike has everyone on threat list
                 me->SetInCombatWithZone();
             }
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_faction_champions.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_faction_champions.cpp
index 0a43c01081f..3d59f24b6dd 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_faction_champions.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_faction_champions.cpp
@@ -348,10 +348,11 @@ class boss_toc_champion_controller : public CreatureScript
         {
             boss_toc_champion_controllerAI(Creature* creature) : ScriptedAI(creature), _summons(me)
             {
+                Initialize();
                 _instance = creature->GetInstanceScript();
             }
 
-            void Reset() override
+            void Initialize()
             {
                 _championsNotStarted = 0;
                 _championsFailed = 0;
@@ -359,6 +360,11 @@ class boss_toc_champion_controller : public CreatureScript
                 _inProgress = false;
             }
 
+            void Reset() override
+            {
+                Initialize();
+            }
+
             std::vector<uint32> SelectChampions(Team playerTeam)
             {
                 std::vector<uint32> vHealersEntries;
@@ -1908,7 +1914,17 @@ class npc_toc_enh_shaman : public CreatureScript
 
         struct npc_toc_enh_shamanAI : public boss_faction_championsAI
         {
-            npc_toc_enh_shamanAI(Creature* creature) : boss_faction_championsAI(creature, AI_MELEE) { }
+            npc_toc_enh_shamanAI(Creature* creature) : boss_faction_championsAI(creature, AI_MELEE)
+            {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _totemCount = 0;
+                _totemOldCenterX = me->GetPositionX();
+                _totemOldCenterY = me->GetPositionY();
+            }
 
             void Reset() override
             {
@@ -1920,9 +1936,7 @@ class npc_toc_enh_shaman : public CreatureScript
                 events.ScheduleEvent(EVENT_DEPLOY_TOTEM, 1*IN_MILLISECONDS);
                 events.ScheduleEvent(EVENT_WINDFURY, urand(20*IN_MILLISECONDS, 50*IN_MILLISECONDS));
 
-                _totemCount = 0;
-                _totemOldCenterX = me->GetPositionX();
-                _totemOldCenterY = me->GetPositionY();
+                Initialize();
                 SetEquipmentSlots(false, 51803, 48013, EQUIP_NO_CHANGE);
                 summons.DespawnAll();
             }
@@ -2192,12 +2206,20 @@ class npc_toc_pet_hunter : public CreatureScript
 
         struct npc_toc_pet_hunterAI : public boss_faction_championsAI
         {
-            npc_toc_pet_hunterAI(Creature* creature) : boss_faction_championsAI(creature, AI_PET) { }
+            npc_toc_pet_hunterAI(Creature* creature) : boss_faction_championsAI(creature, AI_PET)
+            {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _clawTimer = urand(5 * IN_MILLISECONDS, 10 * IN_MILLISECONDS);
+            }
 
             void Reset() override
             {
                 boss_faction_championsAI::Reset();
-                _clawTimer = urand(5*IN_MILLISECONDS, 10*IN_MILLISECONDS);
+                Initialize();
             }
 
             void UpdateAI(uint32 diff) override
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_lord_jaraxxus.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_lord_jaraxxus.cpp
index c0f7b2f1856..a8a370076a8 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_lord_jaraxxus.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_lord_jaraxxus.cpp
@@ -315,12 +315,18 @@ class npc_fel_infernal : public CreatureScript
         {
             npc_fel_infernalAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
                 _instance = creature->GetInstanceScript();
             }
 
+            void Initialize()
+            {
+                _felStreakTimer = 30 * IN_MILLISECONDS;
+            }
+
             void Reset() override
             {
-                _felStreakTimer = 30*IN_MILLISECONDS;
+                Initialize();
                 me->SetInCombatWithZone();
             }
 
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_northrend_beasts.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_northrend_beasts.cpp
index 9e75bef9735..f4112b7a43b 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_northrend_beasts.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_northrend_beasts.cpp
@@ -492,6 +492,18 @@ struct boss_jormungarAI : public BossAI
 {
     boss_jormungarAI(Creature* creature) : BossAI(creature, BOSS_BEASTS)
     {
+        OtherWormEntry = 0;
+        ModelStationary = 0;
+        ModelMobile = 0;
+
+        BiteSpell = 0;
+        SpewSpell = 0;
+        SpitSpell = 0;
+        SpraySpell = 0;
+
+        Phase = PHASE_MOBILE;
+        Enraged = false;
+        WasMobile = false;
     }
 
     void Reset() override
@@ -780,12 +792,18 @@ class npc_slime_pool : public CreatureScript
         {
             npc_slime_poolAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
                 _instance = creature->GetInstanceScript();
             }
 
-            void Reset() override
+            void Initialize()
             {
                 _cast = false;
+            }
+
+            void Reset() override
+            {
+                Initialize();
                 me->SetReactState(REACT_PASSIVE);
             }
 
@@ -851,14 +869,11 @@ class boss_icehowl : public CreatureScript
         {
             boss_icehowlAI(Creature* creature) : BossAI(creature, BOSS_BEASTS)
             {
+                Initialize();
             }
 
-            void Reset() override
+            void Initialize()
             {
-                events.ScheduleEvent(EVENT_FEROCIOUS_BUTT, urand(15*IN_MILLISECONDS, 30*IN_MILLISECONDS));
-                events.ScheduleEvent(EVENT_ARCTIC_BREATH, urand(15*IN_MILLISECONDS, 25*IN_MILLISECONDS));
-                events.ScheduleEvent(EVENT_WHIRL, urand(15*IN_MILLISECONDS, 30*IN_MILLISECONDS));
-                events.ScheduleEvent(EVENT_MASSIVE_CRASH, 30*IN_MILLISECONDS);
                 _movementStarted = false;
                 _movementFinish = false;
                 _trampleCast = false;
@@ -869,6 +884,15 @@ class boss_icehowl : public CreatureScript
                 _stage = 0;
             }
 
+            void Reset() override
+            {
+                events.ScheduleEvent(EVENT_FEROCIOUS_BUTT, urand(15*IN_MILLISECONDS, 30*IN_MILLISECONDS));
+                events.ScheduleEvent(EVENT_ARCTIC_BREATH, urand(15*IN_MILLISECONDS, 25*IN_MILLISECONDS));
+                events.ScheduleEvent(EVENT_WHIRL, urand(15*IN_MILLISECONDS, 30*IN_MILLISECONDS));
+                events.ScheduleEvent(EVENT_MASSIVE_CRASH, 30*IN_MILLISECONDS);
+                Initialize();
+            }
+
             void JustDied(Unit* /*killer*/) override
             {
                 _JustDied();
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_twin_valkyr.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_twin_valkyr.cpp
index 68de65f9f7b..1118c1ec27b 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_twin_valkyr.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_twin_valkyr.cpp
@@ -143,6 +143,33 @@ struct boss_twin_baseAI : public BossAI
 {
     boss_twin_baseAI(Creature* creature) : BossAI(creature, BOSS_VALKIRIES)
     {
+        Initialize();
+        AuraState = AURA_STATE_NONE;
+
+        Stage = 0;
+
+        Weapon = 0;
+
+        VortexEmote = 0;
+        SisterNpcId = 0;
+        MyEmphatySpellId = 0;
+        OtherEssenceSpellId = 0;
+        SurgeSpellId = 0;
+        VortexSpellId = 0;
+        ShieldSpellId = 0;
+        TwinPactSpellId = 0;
+        SpikeSpellId = 0;
+        TouchSpellId = 0;
+    }
+
+    void Initialize()
+    {
+        IsBerserk = false;
+
+        SpecialAbilityTimer = 1 * MINUTE*IN_MILLISECONDS;
+        SpikeTimer = 20 * IN_MILLISECONDS;
+        TouchTimer = urand(10 * IN_MILLISECONDS, 15 * IN_MILLISECONDS);
+        BerserkTimer = IsHeroic() ? 6 * MINUTE*IN_MILLISECONDS : 10 * MINUTE*IN_MILLISECONDS;
     }
 
     void Reset() override
@@ -153,12 +180,7 @@ struct boss_twin_baseAI : public BossAI
         /* Uncomment this once that they are floating above the ground
         me->SetLevitate(true);
         me->SetFlying(true); */
-        IsBerserk = false;
-
-        SpecialAbilityTimer = 1*MINUTE*IN_MILLISECONDS;
-        SpikeTimer = 20*IN_MILLISECONDS;
-        TouchTimer = urand(10*IN_MILLISECONDS, 15*IN_MILLISECONDS);
-        BerserkTimer = IsHeroic() ? 6*MINUTE*IN_MILLISECONDS : 10*MINUTE*IN_MILLISECONDS;
+        Initialize();
 
         summons.DespawnAll();
     }
@@ -524,6 +546,12 @@ struct npc_unleashed_ballAI : public ScriptedAI
 {
     npc_unleashed_ballAI(Creature* creature) : ScriptedAI(creature)
     {
+        Initialize();
+    }
+
+    void Initialize()
+    {
+        RangeCheckTimer = 0.5*IN_MILLISECONDS;
     }
 
     void MoveToNextPoint()
@@ -548,7 +576,7 @@ struct npc_unleashed_ballAI : public ScriptedAI
         me->SetCanFly(true);
         SetCombatMovement(false);
         MoveToNextPoint();
-        RangeCheckTimer = 0.5*IN_MILLISECONDS;
+        Initialize();
     }
 
     void MovementInform(uint32 uiType, uint32 uiId) override
diff --git a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/trial_of_the_crusader.cpp b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/trial_of_the_crusader.cpp
index 11548ba4b1c..7829d1be627 100644
--- a/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/trial_of_the_crusader.cpp
+++ b/src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/trial_of_the_crusader.cpp
@@ -240,7 +240,6 @@ class boss_lich_king_toc : public CreatureScript
 
             void Reset() override
             {
-                _updateTimer = 0;
                 me->SetReactState(REACT_PASSIVE);
                 if (Creature* summoned = me->SummonCreature(NPC_TRIGGER, ToCCommonLoc[2].GetPositionX(), ToCCommonLoc[2].GetPositionY(), ToCCommonLoc[2].GetPositionZ(), 5, TEMPSUMMON_TIMED_DESPAWN, 1*MINUTE*IN_MILLISECONDS))
                 {
@@ -278,7 +277,7 @@ class boss_lich_king_toc : public CreatureScript
                 if (_instance->GetData(TYPE_EVENT_NPC) != NPC_LICH_KING)
                     return;
 
-                _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
+                uint32 _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
                 if (_updateTimer <= uiDiff)
                 {
                     switch (_instance->GetData(TYPE_EVENT))
@@ -352,7 +351,6 @@ class boss_lich_king_toc : public CreatureScript
 
             private:
                 InstanceScript* _instance;
-                uint32 _updateTimer;
         };
 
         CreatureAI* GetAI(Creature* creature) const override
@@ -370,7 +368,14 @@ class npc_fizzlebang_toc : public CreatureScript
         {
             npc_fizzlebang_tocAI(Creature* creature) : ScriptedAI(creature), _summons(me)
             {
+                Initialize();
                 _instance = me->GetInstanceScript();
+                _triggerGUID = 0;
+            }
+
+            void Initialize()
+            {
+                _portalGUID = 0;
             }
 
             void JustDied(Unit* killer) override
@@ -388,7 +393,7 @@ class npc_fizzlebang_toc : public CreatureScript
             void Reset() override
             {
                 me->SetWalk(true);
-                _portalGUID = 0;
+                Initialize();
                 me->GetMotionMaster()->MovePoint(1, ToCCommonLoc[10].GetPositionX(), ToCCommonLoc[10].GetPositionY()-60, ToCCommonLoc[10].GetPositionZ());
             }
 
@@ -423,7 +428,7 @@ class npc_fizzlebang_toc : public CreatureScript
                 if (_instance->GetData(TYPE_EVENT_NPC) != NPC_FIZZLEBANG)
                     return;
 
-                _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
+                uint32 _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
                 if (_updateTimer <= uiDiff)
                 {
                     switch (_instance->GetData(TYPE_EVENT))
@@ -521,7 +526,6 @@ class npc_fizzlebang_toc : public CreatureScript
             private:
                 InstanceScript* _instance;
                 SummonList _summons;
-                uint32 _updateTimer;
                 uint64 _portalGUID;
                 uint64 _triggerGUID;
         };
@@ -556,7 +560,7 @@ class npc_tirion_toc : public CreatureScript
                 if (_instance->GetData(TYPE_EVENT_NPC) != NPC_TIRION)
                     return;
 
-                _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
+                uint32 _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
                 if (_updateTimer <= uiDiff)
                 {
                     switch (_instance->GetData(TYPE_EVENT))
@@ -811,7 +815,6 @@ class npc_tirion_toc : public CreatureScript
             }
             private:
                 InstanceScript* _instance;
-                uint32 _updateTimer;
         };
 
         CreatureAI* GetAI(Creature* creature) const override
@@ -844,7 +847,7 @@ class npc_garrosh_toc : public CreatureScript
                 if (_instance->GetData(TYPE_EVENT_NPC) != NPC_GARROSH)
                     return;
 
-                _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
+                uint32 _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
                 if (_updateTimer <= uiDiff)
                 {
                     switch (_instance->GetData(TYPE_EVENT))
@@ -895,7 +898,6 @@ class npc_garrosh_toc : public CreatureScript
             }
             private:
                 InstanceScript* _instance;
-                uint32 _updateTimer;
         };
 
         CreatureAI* GetAI(Creature* creature) const override
@@ -928,7 +930,7 @@ class npc_varian_toc : public CreatureScript
                 if (_instance->GetData(TYPE_EVENT_NPC) != NPC_VARIAN)
                     return;
 
-                _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
+                uint32 _updateTimer = _instance->GetData(TYPE_EVENT_TIMER);
                 if (_updateTimer <= uiDiff)
                 {
                     switch (_instance->GetData(TYPE_EVENT))
@@ -979,7 +981,6 @@ class npc_varian_toc : public CreatureScript
             }
             private:
                 InstanceScript* _instance;
-                uint32 _updateTimer;
         };
 
         CreatureAI* GetAI(Creature* creature) const override
diff --git a/src/server/scripts/Northrend/DraktharonKeep/boss_king_dred.cpp b/src/server/scripts/Northrend/DraktharonKeep/boss_king_dred.cpp
index a1690598532..694e502e508 100644
--- a/src/server/scripts/Northrend/DraktharonKeep/boss_king_dred.cpp
+++ b/src/server/scripts/Northrend/DraktharonKeep/boss_king_dred.cpp
@@ -58,10 +58,19 @@ class boss_king_dred : public CreatureScript
 
         struct boss_king_dredAI : public BossAI
         {
-            boss_king_dredAI(Creature* creature) : BossAI(creature, DATA_KING_DRED) { }
+            boss_king_dredAI(Creature* creature) : BossAI(creature, DATA_KING_DRED)
+            {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                raptorsKilled = 0;
+            }
 
             void Reset() override
             {
+                Initialize();
                 _Reset();
             }
 
@@ -166,16 +175,22 @@ class npc_drakkari_gutripper : public CreatureScript
         {
             npc_drakkari_gutripperAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
                 instance = me->GetInstanceScript();
             }
 
+            void Initialize()
+            {
+                GutRipTimer = urand(10000, 15000);
+            }
+
             InstanceScript* instance;
 
             uint32 GutRipTimer;
 
             void Reset() override
             {
-                GutRipTimer = urand(10000, 15000);
+                Initialize();
             }
 
             void UpdateAI(uint32 diff) override
@@ -216,16 +231,22 @@ class npc_drakkari_scytheclaw : public CreatureScript
         {
             npc_drakkari_scytheclawAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
                 instance = me->GetInstanceScript();
             }
 
+            void Initialize()
+            {
+                uiRendTimer = urand(10000, 15000);
+            }
+
             InstanceScript* instance;
 
             uint32 uiRendTimer;
 
             void Reset() override
             {
-                uiRendTimer = urand(10000, 15000);
+                Initialize();
             }
 
             void UpdateAI(uint32 diff) override
diff --git a/src/server/scripts/Northrend/DraktharonKeep/boss_novos.cpp b/src/server/scripts/Northrend/DraktharonKeep/boss_novos.cpp
index 4e9462a447f..6b26143745b 100644
--- a/src/server/scripts/Northrend/DraktharonKeep/boss_novos.cpp
+++ b/src/server/scripts/Northrend/DraktharonKeep/boss_novos.cpp
@@ -80,14 +80,23 @@ public:
 
     struct boss_novosAI : public BossAI
     {
-        boss_novosAI(Creature* creature) : BossAI(creature, DATA_NOVOS) { }
+        boss_novosAI(Creature* creature) : BossAI(creature, DATA_NOVOS)
+        {
+            Initialize();
+            _bubbled = false;
+        }
+
+        void Initialize()
+        {
+            _ohNovos = true;
+            _crystalHandlerCount = 0;
+        }
 
         void Reset() override
         {
             _Reset();
 
-            _ohNovos = true;
-            _crystalHandlerCount = 0;
+            Initialize();
             SetCrystalsStatus(false);
             SetSummonerStatus(false);
             SetBubbled(false);
@@ -280,15 +289,23 @@ public:
 
     struct npc_crystal_channel_targetAI : public ScriptedAI
     {
-        npc_crystal_channel_targetAI(Creature* creature) : ScriptedAI(creature) { }
+        npc_crystal_channel_targetAI(Creature* creature) : ScriptedAI(creature)
+        {
+            Initialize();
+        }
 
-        void Reset() override
+        void Initialize()
         {
             _spell = 0;
             _timer = 0;
             _temp = 0;
         }
 
+        void Reset() override
+        {
+            Initialize();
+        }
+
         void UpdateAI(uint32 diff) override
         {
             if (_spell)
diff --git a/src/server/scripts/Northrend/DraktharonKeep/boss_trollgore.cpp b/src/server/scripts/Northrend/DraktharonKeep/boss_trollgore.cpp
index 13d968d9e06..a8f083c97ee 100644
--- a/src/server/scripts/Northrend/DraktharonKeep/boss_trollgore.cpp
+++ b/src/server/scripts/Northrend/DraktharonKeep/boss_trollgore.cpp
@@ -73,12 +73,20 @@ class boss_trollgore : public CreatureScript
 
         struct boss_trollgoreAI : public BossAI
         {
-            boss_trollgoreAI(Creature* creature) : BossAI(creature, DATA_TROLLGORE) { }
+            boss_trollgoreAI(Creature* creature) : BossAI(creature, DATA_TROLLGORE)
+            {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _consumptionJunction = true;
+            }
 
             void Reset() override
             {
                 _Reset();
-                _consumptionJunction = true;
+                Initialize();
             }
 
             void EnterCombat(Unit* /*who*/) override
diff --git a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_bronjahm.cpp b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_bronjahm.cpp
index fe98f005bca..670591a058c 100644
--- a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_bronjahm.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_bronjahm.cpp
@@ -71,14 +71,6 @@ class boss_bronjahm : public CreatureScript
                 DoCast(me, SPELL_SOULSTORM_CHANNEL, true);
             }
 
-            void InitializeAI() override
-            {
-                if (!instance || static_cast<InstanceMap*>(me->GetMap())->GetScriptId() != sObjectMgr->GetScriptId(FoSScriptName))
-                    me->IsAIEnabled = false;
-                else if (!me->isDead())
-                    Reset();
-            }
-
             void Reset() override
             {
                 events.Reset();
@@ -188,7 +180,7 @@ class boss_bronjahm : public CreatureScript
 
         CreatureAI* GetAI(Creature* creature) const override
         {
-            return GetInstanceAI<boss_bronjahmAI>(creature);
+            return GetInstanceAI<boss_bronjahmAI>(creature, FoSScriptName);
         }
 };
 
diff --git a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_devourer_of_souls.cpp b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_devourer_of_souls.cpp
index a048abd6554..4b4fd398e72 100644
--- a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_devourer_of_souls.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_devourer_of_souls.cpp
@@ -130,14 +130,15 @@ class boss_devourer_of_souls : public CreatureScript
         {
             boss_devourer_of_soulsAI(Creature* creature) : BossAI(creature, DATA_DEVOURER_EVENT)
             {
+                Initialize();
+                beamAngle = 0.f;
+                beamAngleDiff = 0.f;
+                wailingSoulTick = 0;
             }
 
-            void InitializeAI() override
+            void Initialize()
             {
-                if (!instance || static_cast<InstanceMap*>(me->GetMap())->GetScriptId() != sObjectMgr->GetScriptId(FoSScriptName))
-                    me->IsAIEnabled = false;
-                else if (!me->isDead())
-                    Reset();
+                threeFaced = true;
             }
 
             void Reset() override
@@ -149,7 +150,7 @@ class boss_devourer_of_souls : public CreatureScript
                 events.Reset();
                 summons.DespawnAll();
 
-                threeFaced = true;
+                Initialize();
 
                 instance->SetData(DATA_DEVOURER_EVENT, NOT_STARTED);
             }
@@ -345,7 +346,7 @@ class boss_devourer_of_souls : public CreatureScript
 
         CreatureAI* GetAI(Creature* creature) const override
         {
-            return GetInstanceAI<boss_devourer_of_soulsAI>(creature);
+            return GetInstanceAI<boss_devourer_of_soulsAI>(creature, FoSScriptName);
         }
 };
 
diff --git a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/forge_of_souls.cpp b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/forge_of_souls.cpp
index fc9a786aab9..7a36dfe7fae 100644
--- a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/forge_of_souls.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/forge_of_souls.cpp
@@ -80,10 +80,16 @@ public:
     {
         npc_sylvanas_fosAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = me->GetInstanceScript();
             me->SetFlag(UNIT_NPC_FLAGS, UNIT_NPC_FLAG_GOSSIP);
         }
 
+        void Initialize()
+        {
+            phase = PHASE_NORMAL;
+        }
+
         InstanceScript* instance;
 
         EventMap events;
@@ -92,7 +98,7 @@ public:
         void Reset() override
         {
             events.Reset();
-            phase = PHASE_NORMAL;
+            Initialize();
         }
 
         void DoAction(int32 actionId) override
@@ -203,10 +209,16 @@ public:
     {
         npc_jaina_fosAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = me->GetInstanceScript();
             me->SetFlag(UNIT_NPC_FLAGS, UNIT_NPC_FLAG_GOSSIP);
         }
 
+        void Initialize()
+        {
+            phase = PHASE_NORMAL;
+        }
+
         InstanceScript* instance;
 
         EventMap events;
@@ -215,7 +227,7 @@ public:
         void Reset() override
         {
             events.Reset();
-            phase = PHASE_NORMAL;
+            Initialize();
         }
 
         void DoAction(int32 actionId) override
diff --git a/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/boss_falric.cpp b/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/boss_falric.cpp
index a5577b6a0ea..a014be4369e 100644
--- a/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/boss_falric.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/boss_falric.cpp
@@ -55,12 +55,20 @@ class boss_falric : public CreatureScript
 
         struct boss_falricAI : public boss_horAI
         {
-            boss_falricAI(Creature* creature) : boss_horAI(creature, DATA_FALRIC) { }
+            boss_falricAI(Creature* creature) : boss_horAI(creature, DATA_FALRIC)
+            {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _hopelessnessCount = 0;
+            }
 
             void Reset() override
             {
                 boss_horAI::Reset();
-                _hopelessnessCount = 0;
+                Initialize();
             }
 
             void EnterCombat(Unit* /*who*/) override
diff --git a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_forgemaster_garfrost.cpp b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_forgemaster_garfrost.cpp
index 783f9e245c8..62a6ac41074 100644
--- a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_forgemaster_garfrost.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_forgemaster_garfrost.cpp
@@ -82,14 +82,22 @@ class boss_garfrost : public CreatureScript
 
         struct boss_garfrostAI : public BossAI
         {
-            boss_garfrostAI(Creature* creature) : BossAI(creature, DATA_GARFROST) { }
+            boss_garfrostAI(Creature* creature) : BossAI(creature, DATA_GARFROST)
+            {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _permafrostStack = 0;
+            }
 
             void Reset() override
             {
                 _Reset();
                 events.SetPhase(PHASE_ONE);
                 SetEquipmentSlots(true);
-                _permafrostStack = 0;
+                Initialize();
             }
 
             void EnterCombat(Unit* /*who*/) override
diff --git a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_krickandick.cpp b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_krickandick.cpp
index 3f8e1cc6ee0..5b147344a59 100644
--- a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_krickandick.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_krickandick.cpp
@@ -140,6 +140,7 @@ class boss_ick : public CreatureScript
             boss_ickAI(Creature* creature) : BossAI(creature, DATA_ICK), _vehicle(creature->GetVehicleKit())
             {
                 ASSERT(_vehicle);
+                _tempThreat = 0;
             }
 
             void Reset() override
@@ -286,14 +287,20 @@ class boss_krick : public CreatureScript
         {
             boss_krickAI(Creature* creature) : ScriptedAI(creature), _instanceScript(creature->GetInstanceScript()), _summons(creature)
             {
+                Initialize();
             }
 
-            void Reset() override
+            void Initialize()
             {
-                _events.Reset();
                 _phase = PHASE_COMBAT;
                 _outroNpcGUID = 0;
                 _tyrannusGUID = 0;
+            }
+
+            void Reset() override
+            {
+                _events.Reset();
+                Initialize();
 
                 me->SetReactState(REACT_PASSIVE);
                 me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE);
diff --git a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_scourgelord_tyrannus.cpp b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_scourgelord_tyrannus.cpp
index c4f46136bd9..f392b21b173 100644
--- a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_scourgelord_tyrannus.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_scourgelord_tyrannus.cpp
@@ -293,14 +293,20 @@ class boss_rimefang : public CreatureScript
             boss_rimefangAI(Creature* creature) : ScriptedAI(creature), _vehicle(creature->GetVehicleKit())
             {
                 ASSERT(_vehicle);
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _currentWaypoint = 0;
+                _hoarfrostTargetGUID = 0;
             }
 
             void Reset() override
             {
                 _events.Reset();
                 _events.SetPhase(PHASE_NONE);
-                _currentWaypoint = 0;
-                _hoarfrostTargetGUID = 0;
+                Initialize();
                 me->SetCanFly(true);
                 me->SetReactState(REACT_PASSIVE);
                 me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE);
diff --git a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/instance_pit_of_saron.cpp b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/instance_pit_of_saron.cpp
index 9b9376c34f2..d829b98f926 100644
--- a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/instance_pit_of_saron.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/instance_pit_of_saron.cpp
@@ -52,6 +52,7 @@ class instance_pit_of_saron : public InstanceMapScript
                 _jainaOrSylvanas1GUID = 0;
                 _jainaOrSylvanas2GUID = 0;
                 _teamInInstance = 0;
+                _tyrannusEventGUID = 0;
             }
 
             void OnPlayerEnter(Player* player) override
diff --git a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/pit_of_saron.cpp b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/pit_of_saron.cpp
index 7bd9325dd97..4d2ebd44db8 100644
--- a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/pit_of_saron.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/pit_of_saron.cpp
@@ -113,13 +113,19 @@ class npc_iceborn_protodrake : public CreatureScript
             npc_iceborn_protodrakeAI(Creature* creature) : ScriptedAI(creature), _vehicle(creature->GetVehicleKit())
             {
                 ASSERT(_vehicle);
+                Initialize();
             }
 
-            void Reset() override
+            void Initialize()
             {
                 _frostBreathCooldown = 5000;
             }
 
+            void Reset() override
+            {
+                Initialize();
+            }
+
             void EnterCombat(Unit* /*who*/) override
             {
                 _vehicle->RemoveAllPassengers();
@@ -161,13 +167,19 @@ class npc_geist_ambusher : public CreatureScript
         {
             npc_geist_ambusherAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
             }
 
-            void Reset() override
+            void Initialize()
             {
                 _leapingFaceMaulCooldown = 9000;
             }
 
+            void Reset() override
+            {
+                Initialize();
+            }
+
             void EnterCombat(Unit* who) override
             {
                 if (who->GetTypeId() != TYPEID_PLAYER)
diff --git a/src/server/scripts/Northrend/Gundrak/boss_drakkari_colossus.cpp b/src/server/scripts/Northrend/Gundrak/boss_drakkari_colossus.cpp
index 68929d2aa01..001f19679c4 100644
--- a/src/server/scripts/Northrend/Gundrak/boss_drakkari_colossus.cpp
+++ b/src/server/scripts/Northrend/Gundrak/boss_drakkari_colossus.cpp
@@ -82,14 +82,14 @@ class boss_drakkari_colossus : public CreatureScript
         {
             boss_drakkari_colossusAI(Creature* creature) : BossAI(creature, DATA_DRAKKARI_COLOSSUS_EVENT)
             {
+                Initialize();
                 me->SetReactState(REACT_PASSIVE);
                 introDone = false;
             }
 
-            void InitializeAI() override
+            void Initialize()
             {
-                if (!me->isDead())
-                    Reset();
+                phase = COLOSSUS_PHASE_NORMAL;
             }
 
             void Reset() override
@@ -106,7 +106,7 @@ class boss_drakkari_colossus : public CreatureScript
                 //events.Reset(); -> done in _Reset();
                 events.ScheduleEvent(EVENT_MIGHTY_BLOW, urand(10000, 30000));
 
-                phase = COLOSSUS_PHASE_NORMAL;
+                Initialize();
 
                 // Note: This should not be called, but before use SetBossState function we should use BossAI
                 //        in all the bosses of the instance
@@ -393,13 +393,19 @@ public:
     {
         npc_living_mojoAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            mojoWaveTimer = 2 * IN_MILLISECONDS;
+            mojoPuddleTimer = 7 * IN_MILLISECONDS;
+        }
+
         void Reset() override
         {
-            mojoWaveTimer = 2*IN_MILLISECONDS;
-            mojoPuddleTimer = 7*IN_MILLISECONDS;
+            Initialize();
         }
 
         void MoveMojos(Creature* boss)
diff --git a/src/server/scripts/Northrend/Gundrak/boss_eck.cpp b/src/server/scripts/Northrend/Gundrak/boss_eck.cpp
index 8e0ff54e161..0783a79b381 100644
--- a/src/server/scripts/Northrend/Gundrak/boss_eck.cpp
+++ b/src/server/scripts/Northrend/Gundrak/boss_eck.cpp
@@ -44,9 +44,20 @@ public:
     {
         boss_eckAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            uiBerserkTimer = urand(60 * IN_MILLISECONDS, 90 * IN_MILLISECONDS); //60-90 secs according to wowwiki
+            uiBiteTimer = 5 * IN_MILLISECONDS;
+            uiSpitTimer = 10 * IN_MILLISECONDS;
+            uiSpringTimer = 8 * IN_MILLISECONDS;
+
+            bBerserk = false;
+        }
+
         uint32 uiBerserkTimer;
         uint32 uiBiteTimer;
         uint32 uiSpitTimer;
@@ -58,12 +69,7 @@ public:
 
         void Reset() override
         {
-            uiBerserkTimer = urand(60*IN_MILLISECONDS, 90*IN_MILLISECONDS); //60-90 secs according to wowwiki
-            uiBiteTimer = 5*IN_MILLISECONDS;
-            uiSpitTimer = 10*IN_MILLISECONDS;
-            uiSpringTimer = 8*IN_MILLISECONDS;
-
-            bBerserk = false;
+            Initialize();
 
             instance->SetData(DATA_ECK_THE_FEROCIOUS_EVENT, NOT_STARTED);
         }
diff --git a/src/server/scripts/Northrend/Gundrak/boss_gal_darah.cpp b/src/server/scripts/Northrend/Gundrak/boss_gal_darah.cpp
index f1c246dbbea..22e7ac280fd 100644
--- a/src/server/scripts/Northrend/Gundrak/boss_gal_darah.cpp
+++ b/src/server/scripts/Northrend/Gundrak/boss_gal_darah.cpp
@@ -77,9 +77,26 @@ public:
     {
         boss_gal_darahAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            uiStampedeTimer = 10 * IN_MILLISECONDS;
+            uiWhirlingSlashTimer = 21 * IN_MILLISECONDS;
+            uiPunctureTimer = 10 * IN_MILLISECONDS;
+            uiEnrageTimer = 15 * IN_MILLISECONDS;
+            uiImpalingChargeTimer = 21 * IN_MILLISECONDS;
+            uiStompTimer = 25 * IN_MILLISECONDS;
+            uiTransformationTimer = 9 * IN_MILLISECONDS;
+            uiPhaseCounter = 0;
+
+            shareTheLove = 0;
+            bStartOfTransformation = true;
+            Phase = TROLL;
+        }
+
         uint32 uiStampedeTimer;
         uint32 uiWhirlingSlashTimer;
         uint32 uiPunctureTimer;
@@ -100,21 +117,9 @@ public:
 
         void Reset() override
         {
-            uiStampedeTimer = 10*IN_MILLISECONDS;
-            uiWhirlingSlashTimer = 21*IN_MILLISECONDS;
-            uiPunctureTimer = 10*IN_MILLISECONDS;
-            uiEnrageTimer = 15*IN_MILLISECONDS;
-            uiImpalingChargeTimer = 21*IN_MILLISECONDS;
-            uiStompTimer = 25*IN_MILLISECONDS;
-            uiTransformationTimer = 9*IN_MILLISECONDS;
-            uiPhaseCounter = 0;
+            Initialize();
 
             impaledList.clear();
-            shareTheLove = 0;
-
-            bStartOfTransformation = true;
-
-            Phase = TROLL;
 
             me->SetDisplayId(DISPLAY_TROLL);
 
diff --git a/src/server/scripts/Northrend/Gundrak/boss_moorabi.cpp b/src/server/scripts/Northrend/Gundrak/boss_moorabi.cpp
index 7645d984aac..255a5ece261 100644
--- a/src/server/scripts/Northrend/Gundrak/boss_moorabi.cpp
+++ b/src/server/scripts/Northrend/Gundrak/boss_moorabi.cpp
@@ -61,9 +61,19 @@ public:
     {
         boss_moorabiAI(Creature* creature) : ScriptedAI(creature)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            uiGroundTremorTimer = 18 * IN_MILLISECONDS;
+            uiNumblingShoutTimer = 10 * IN_MILLISECONDS;
+            uiDeterminedStabTimer = 20 * IN_MILLISECONDS;
+            uiTransformationTImer = 12 * IN_MILLISECONDS;
+            bPhase = false;
+        }
+
         InstanceScript* instance;
 
         bool bPhase;
@@ -75,11 +85,7 @@ public:
 
         void Reset() override
         {
-            uiGroundTremorTimer = 18*IN_MILLISECONDS;
-            uiNumblingShoutTimer =  10*IN_MILLISECONDS;
-            uiDeterminedStabTimer = 20*IN_MILLISECONDS;
-            uiTransformationTImer = 12*IN_MILLISECONDS;
-            bPhase = false;
+            Initialize();
 
             instance->SetData(DATA_MOORABI_EVENT, NOT_STARTED);
         }
diff --git a/src/server/scripts/Northrend/Gundrak/boss_slad_ran.cpp b/src/server/scripts/Northrend/Gundrak/boss_slad_ran.cpp
index 98c8481b5ae..5db49415604 100644
--- a/src/server/scripts/Northrend/Gundrak/boss_slad_ran.cpp
+++ b/src/server/scripts/Northrend/Gundrak/boss_slad_ran.cpp
@@ -83,9 +83,19 @@ public:
     {
         boss_slad_ranAI(Creature* creature) : ScriptedAI(creature), lSummons(me)
         {
+            Initialize();
             instance = creature->GetInstanceScript();
         }
 
+        void Initialize()
+        {
+            uiPoisonNovaTimer = 10 * IN_MILLISECONDS;
+            uiPowerfullBiteTimer = 3 * IN_MILLISECONDS;
+            uiVenomBoltTimer = 15 * IN_MILLISECONDS;
+            uiSpawnTimer = 5 * IN_MILLISECONDS;
+            uiPhase = 0;
+        }
+
         uint32 uiPoisonNovaTimer;
         uint32 uiPowerfullBiteTimer;
         uint32 uiVenomBoltTimer;
@@ -100,11 +110,7 @@ public:
 
         void Reset() override
         {
-            uiPoisonNovaTimer = 10*IN_MILLISECONDS;
-            uiPowerfullBiteTimer = 3*IN_MILLISECONDS;
-            uiVenomBoltTimer = 15*IN_MILLISECONDS;
-            uiSpawnTimer = 5*IN_MILLISECONDS;
-            uiPhase = 0;
+            Initialize();
             lWrappedPlayers.clear();
 
             lSummons.DespawnAll();
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_prince_council.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_prince_council.cpp
index a9088207ebe..3aebed81f0b 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_prince_council.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_prince_council.cpp
@@ -182,14 +182,20 @@ class boss_blood_council_controller : public CreatureScript
         {
             boss_blood_council_controllerAI(Creature* creature) : BossAI(creature, DATA_BLOOD_PRINCE_COUNCIL)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _invocationStage = 0;
+                _resetCounter = 0;
             }
 
             void Reset() override
             {
                 events.Reset();
                 me->SetReactState(REACT_PASSIVE);
-                _invocationStage = 0;
-                _resetCounter = 0;
+                Initialize();
 
                 instance->SetBossState(DATA_BLOOD_PRINCE_COUNCIL, NOT_STARTED);
             }
@@ -1142,6 +1148,7 @@ class npc_ball_of_flame : public CreatureScript
             npc_ball_of_flameAI(Creature* creature) : ScriptedAI(creature), _instance(creature->GetInstanceScript())
             {
                 _despawnTimer = 0;
+                _chaseGUID = 0;
             }
 
             void Reset() override
@@ -1224,7 +1231,12 @@ class npc_kinetic_bomb : public CreatureScript
 
         struct npc_kinetic_bombAI : public ScriptedAI
         {
-            npc_kinetic_bombAI(Creature* creature) : ScriptedAI(creature) { }
+            npc_kinetic_bombAI(Creature* creature) : ScriptedAI(creature)
+            {
+                _x = 0.f;
+                _y = 0.f;
+                _groundZ = 0.f;
+            }
 
             void Reset() override
             {
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp
index 104a8357917..29d50f1db2a 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp
@@ -143,6 +143,14 @@ class boss_blood_queen_lana_thel : public CreatureScript
         {
             boss_blood_queen_lana_thelAI(Creature* creature) : BossAI(creature, DATA_BLOOD_QUEEN_LANA_THEL)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _offtankGUID = 0;
+                _creditBloodQuickening = false;
+                _killMinchar = false;
             }
 
             void Reset() override
@@ -157,10 +165,8 @@ class boss_blood_queen_lana_thel : public CreatureScript
                 events.ScheduleEvent(EVENT_TWILIGHT_BLOODBOLT, urand(20000, 25000), EVENT_GROUP_NORMAL);
                 events.ScheduleEvent(EVENT_AIR_PHASE, 124000 + uint32(Is25ManRaid() ? 3000 : 0));
                 CleanAuras();
-                _offtankGUID = 0;
                 _vampires.clear();
-                _creditBloodQuickening = false;
-                _killMinchar = false;
+                Initialize();
             }
 
             void EnterCombat(Unit* who) override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_deathbringer_saurfang.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_deathbringer_saurfang.cpp
index 5ef84c7bb40..4b9308fc12d 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_deathbringer_saurfang.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_deathbringer_saurfang.cpp
@@ -249,18 +249,24 @@ class boss_deathbringer_saurfang : public CreatureScript
         {
             boss_deathbringer_saurfangAI(Creature* creature) : BossAI(creature, DATA_DEATHBRINGER_SAURFANG)
             {
+                Initialize();
                 ASSERT(creature->GetVehicleKit()); // we dont actually use it, just check if exists
                 _introDone = false;
                 _fallenChampionCastCount = 0;
             }
 
+            void Initialize()
+            {
+                _frenzied = false;
+                _dead = false;
+            }
+
             void Reset() override
             {
                 _Reset();
                 me->SetReactState(REACT_DEFENSIVE);
                 events.SetPhase(PHASE_COMBAT);
-                _frenzied = false;
-                _dead = false;
+                Initialize();
                 me->SetPower(POWER_ENERGY, 0);
                 DoCast(me, SPELL_ZERO_POWER, true);
                 DoCast(me, SPELL_BLOOD_LINK, true);
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_lady_deathwhisper.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_lady_deathwhisper.cpp
index d59e723d070..bbdca1fa8c5 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_lady_deathwhisper.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_lady_deathwhisper.cpp
@@ -218,6 +218,14 @@ class boss_lady_deathwhisper : public CreatureScript
             boss_lady_deathwhisperAI(Creature* creature) : BossAI(creature, DATA_LADY_DEATHWHISPER),
                 _dominateMindCount(RAID_MODE<uint8>(0, 1, 1, 3)), _introDone(false)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _waveCounter = 0;
+                _nextVengefulShadeTargetGUID = 0;
+                _darnavanGUID = 0;
             }
 
             void Reset() override
@@ -225,9 +233,7 @@ class boss_lady_deathwhisper : public CreatureScript
                 _Reset();
                 me->SetPower(POWER_MANA, me->GetMaxPower(POWER_MANA));
                 events.SetPhase(PHASE_ONE);
-                _waveCounter = 0;
-                _nextVengefulShadeTargetGUID = 0;
-                _darnavanGUID = 0;
+                Initialize();
                 DoCast(me, SPELL_SHADOW_CHANNELING);
                 me->RemoveAurasDueToSpell(SPELL_BERSERK);
                 me->RemoveAurasDueToSpell(SPELL_MANA_BARRIER);
@@ -837,6 +843,13 @@ class npc_darnavan : public CreatureScript
         {
             npc_darnavanAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _canCharge = true;
+                _canShatter = true;
             }
 
             void Reset() override
@@ -846,8 +859,7 @@ class npc_darnavan : public CreatureScript
                 _events.ScheduleEvent(EVENT_DARNAVAN_INTIMIDATING_SHOUT, urand(20000, 25000));
                 _events.ScheduleEvent(EVENT_DARNAVAN_MORTAL_STRIKE, urand(25000, 30000));
                 _events.ScheduleEvent(EVENT_DARNAVAN_SUNDER_ARMOR, urand(5000, 8000));
-                _canCharge = true;
-                _canShatter = true;
+                Initialize();
             }
 
             void JustDied(Unit* killer) override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_lord_marrowgar.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_lord_marrowgar.cpp
index 9d24ad062df..b7bf27177ea 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_lord_marrowgar.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_lord_marrowgar.cpp
@@ -133,6 +133,7 @@ class boss_lord_marrowgar : public CreatureScript
                 _coldflameLastPos.Relocate(creature);
                 _introDone = false;
                 _boneSlice = false;
+                _coldflameTarget = 0;
             }
 
             void Reset() override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
index 11f20129b3e..c1a13c90780 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
@@ -223,6 +223,7 @@ class boss_professor_putricide : public CreatureScript
                 _baseSpeed(creature->GetSpeedRate(MOVE_RUN)), _experimentState(EXPERIMENT_STATE_OOZE)
             {
                 _phase = PHASE_NONE;
+                _oozeFloodStage = 0;
             }
 
             void Reset() override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp
index 76c5a93f9c5..3b65c10aaa9 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp
@@ -221,6 +221,14 @@ class boss_sindragosa : public CreatureScript
         {
             boss_sindragosaAI(Creature* creature) : BossAI(creature, DATA_SINDRAGOSA), _summoned(false)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _mysticBuffetStack = 0;
+                _isInAirPhase = false;
+                _isThirdPhase = false;
             }
 
             void Reset() override
@@ -235,9 +243,7 @@ class boss_sindragosa : public CreatureScript
                 events.ScheduleEvent(EVENT_UNCHAINED_MAGIC, urand(9000, 14000), EVENT_GROUP_LAND_PHASE);
                 events.ScheduleEvent(EVENT_ICY_GRIP, 33500, EVENT_GROUP_LAND_PHASE);
                 events.ScheduleEvent(EVENT_AIR_PHASE, 50000);
-                _mysticBuffetStack = 0;
-                _isInAirPhase = false;
-                _isThirdPhase = false;
+                Initialize();
 
                 if (!_summoned)
                 {
@@ -558,6 +564,7 @@ class npc_ice_tomb : public CreatureScript
             npc_ice_tombAI(Creature* creature) : ScriptedAI(creature)
             {
                 _trappedPlayerGUID = 0;
+                _existenceCheckTimer = 0;
                 SetCombatMovement(false);
             }
 
@@ -765,6 +772,12 @@ class npc_rimefang : public CreatureScript
         {
             npc_rimefangAI(Creature* creature) : ScriptedAI(creature), _instance(creature->GetInstanceScript()), _summoned(false)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _icyBlastCounter = 0;
             }
 
             void InitializeAI() override
@@ -783,7 +796,7 @@ class npc_rimefang : public CreatureScript
                 _events.ScheduleEvent(EVENT_FROST_BREATH_RIMEFANG, urand(12000, 15000));
                 _events.ScheduleEvent(EVENT_ICY_BLAST, urand(30000, 35000));
                 me->SetReactState(REACT_DEFENSIVE);
-                _icyBlastCounter = 0;
+                Initialize();
 
                 if (!_summoned)
                 {
@@ -922,7 +935,14 @@ class npc_sindragosa_trash : public CreatureScript
         {
             npc_sindragosa_trashAI(Creature* creature) : ScriptedAI(creature)
             {
+                Initialize();
                 _instance = creature->GetInstanceScript();
+                _frostwyrmId = 0;
+            }
+
+            void Initialize()
+            {
+                _isTaunted = false;
             }
 
             void InitializeAI() override
@@ -946,7 +966,7 @@ class npc_sindragosa_trash : public CreatureScript
                     _events.ScheduleEvent(EVENT_CONCUSSIVE_SHOCK, urand(8000, 10000));
                 }
 
-                _isTaunted = false;
+                Initialize();
             }
 
             void JustRespawned() override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp
index b72b953efb4..e2fe441dae2 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp
@@ -504,6 +504,13 @@ class boss_the_lich_king : public CreatureScript
         {
             boss_the_lich_kingAI(Creature* creature) : BossAI(creature, DATA_THE_LICH_KING)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _necroticPlagueStack = 0;
+                _vileSpiritExplosions = 0;
             }
 
             void Reset() override
@@ -511,8 +518,7 @@ class boss_the_lich_king : public CreatureScript
                 _Reset();
                 me->SetReactState(REACT_PASSIVE);
                 events.SetPhase(PHASE_INTRO);
-                _necroticPlagueStack = 0;
-                _vileSpiritExplosions = 0;
+                Initialize();
                 SetEquipmentSlots(true);
             }
 
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_valithria_dreamwalker.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_valithria_dreamwalker.cpp
index 0c504842c08..2d58a6eeb26 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_valithria_dreamwalker.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_valithria_dreamwalker.cpp
@@ -282,6 +282,17 @@ class boss_valithria_dreamwalker : public CreatureScript
             boss_valithria_dreamwalkerAI(Creature* creature) : ScriptedAI(creature),
                 _instance(creature->GetInstanceScript()), _portalCount(RAID_MODE<uint32>(3, 8, 3, 8))
             {
+                Initialize();
+                _spawnHealth = me->GetHealth();
+            }
+
+            void Initialize()
+            {
+                _missedPortals = 0;
+                _under25PercentTalkDone = false;
+                _over75PercentTalkDone = false;
+                _justDied = false;
+                _done = false;
             }
 
             void InitializeAI() override
@@ -305,11 +316,7 @@ class boss_valithria_dreamwalker : public CreatureScript
                 // Glyph of Dispel Magic - not a percent heal by effect, its cast with custom basepoints
                 me->ApplySpellImmune(0, IMMUNITY_ID, 56131, true);
                 _instance->SendEncounterUnit(ENCOUNTER_FRAME_DISENGAGE, me);
-                _missedPortals = 0;
-                _under25PercentTalkDone = false;
-                _over75PercentTalkDone = false;
-                _justDied = false;
-                _done = false;
+                Initialize();
             }
 
             void AttackStart(Unit* /*target*/) override
@@ -680,6 +687,12 @@ class npc_risen_archmage : public CreatureScript
             npc_risen_archmageAI(Creature* creature) : ScriptedAI(creature),
                 _instance(creature->GetInstanceScript())
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _canCallEnterCombat = true;
             }
 
             bool CanAIAttack(Unit const* target) const override
@@ -693,7 +706,7 @@ class npc_risen_archmage : public CreatureScript
                 _events.ScheduleEvent(EVENT_FROSTBOLT_VOLLEY, urand(5000, 15000));
                 _events.ScheduleEvent(EVENT_MANA_VOID, urand(20000, 25000));
                 _events.ScheduleEvent(EVENT_COLUMN_OF_FROST, urand(10000, 20000));
-                _canCallEnterCombat = true;
+                Initialize();
             }
 
             void EnterCombat(Unit* /*target*/) override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/icecrown_citadel.cpp b/src/server/scripts/Northrend/IcecrownCitadel/icecrown_citadel.cpp
index e85ddc21dda..e403e37835c 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/icecrown_citadel.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/icecrown_citadel.cpp
@@ -385,17 +385,23 @@ class npc_highlord_tirion_fordring_lh : public CreatureScript
         {
             npc_highlord_tirion_fordringAI(Creature* creature) : ScriptedAI(creature), _instance(creature->GetInstanceScript())
             {
+                Initialize();
             }
 
-            void Reset() override
+            void Initialize()
             {
-                _events.Reset();
                 _theLichKing = 0;
                 _bolvarFordragon = 0;
                 _factionNPC = 0;
                 _damnedKills = 0;
             }
 
+            void Reset() override
+            {
+                _events.Reset();
+                Initialize();
+            }
+
             // IMPORTANT NOTE: This is triggered from per-GUID scripts
             // of The Damned SAI
             void SetData(uint32 type, uint32 data) override
@@ -939,11 +945,18 @@ class npc_crok_scourgebane : public CreatureScript
                 _instance(creature->GetInstanceScript()), _respawnTime(creature->GetRespawnDelay()),
                 _corpseDelay(creature->GetCorpseDelay())
             {
+                Initialize();
                 SetDespawnAtEnd(false);
                 SetDespawnAtFar(false);
                 _isEventActive = false;
                 _isEventDone = _instance->GetBossState(DATA_SISTER_SVALNA) == DONE;
+                _currentWPid = 0;
+            }
+
+            void Initialize()
+            {
                 _didUnderTenPercentText = false;
+                _wipeCheckTimer = 1000;
             }
 
             void Reset() override
@@ -952,8 +965,7 @@ class npc_crok_scourgebane : public CreatureScript
                 _events.ScheduleEvent(EVENT_SCOURGE_STRIKE, urand(7500, 12500));
                 _events.ScheduleEvent(EVENT_DEATH_STRIKE, urand(25000, 30000));
                 me->SetReactState(REACT_DEFENSIVE);
-                _didUnderTenPercentText = false;
-                _wipeCheckTimer = 1000;
+                Initialize();
             }
 
             void DoAction(int32 action) override
@@ -1647,12 +1659,18 @@ class npc_impaling_spear : public CreatureScript
         {
             npc_impaling_spearAI(Creature* creature) : CreatureAI(creature)
             {
+                Initialize();
+            }
+
+            void Initialize()
+            {
+                _vehicleCheckTimer = 500;
             }
 
             void Reset() override
             {
                 me->SetReactState(REACT_PASSIVE);
-                _vehicleCheckTimer = 500;
+                Initialize();
             }
 
             void UpdateAI(uint32 diff) override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp b/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
index 64e1d788695..f5f59e5d1fe 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
@@ -174,6 +174,9 @@ class instance_icecrown_citadel : public InstanceMapScript
                 UpperSpireTeleporterActiveState = NOT_STARTED;
                 BloodQuickeningState = NOT_STARTED;
                 BloodQuickeningMinutes = 0;
+                FrozenBolvarGUID = 0;
+                PillarsChainedGUID = 0;
+                PillarsUnchainedGUID = 0;
             }
 
             // A function to help reduce the number of lines for teleporter management.
diff --git a/src/server/scripts/Northrend/Naxxramas/boss_anubrekhan.cpp b/src/server/scripts/Northrend/Naxxramas/boss_anubrekhan.cpp
index 676e4134f11..35402771494 100644
--- a/src/server/scripts/Northrend/Naxxramas/boss_anubrekhan.cpp
+++ b/src/server/scripts/Northrend/Naxxramas/boss_anubrekhan.cpp
@@ -62,7 +62,15 @@ public:
 
     struct boss_anubrekhanAI : public BossAI
     {
-        boss_anubrekhanAI(Creature* creature) : BossAI(creature, BOSS_ANUBREKHAN) { }
+        boss_anubrekhanAI(Creature* creature) : BossAI(creature, BOSS_ANUBREKHAN)
+        {
+            Initialize();
+        }
+
+        void Initialize()
+        {
+            hasTaunted = false;
+        }
 
         bool hasTaunted;
 
@@ -70,7 +78,7 @@ public:
         {
             _Reset();
 
-            hasTaunted = false;
+            Initialize();
 
             if (GetDifficulty() == RAID_DIFFICULTY_25MAN_NORMAL)
             {
diff --git a/src/server/scripts/Northrend/Naxxramas/boss_four_horsemen.cpp b/src/server/scripts/Northrend/Naxxramas/boss_four_horsemen.cpp
index e2ff68ab851..a8de1418cc4 100644
--- a/src/server/scripts/Northrend/Naxxramas/boss_four_horsemen.cpp
+++ b/src/server/scripts/Northrend/Naxxramas/boss_four_horsemen.cpp
@@ -96,12 +96,25 @@ public:
     {
         boss_four_horsemenAI(Creature* creature) : BossAI(creature, BOSS_HORSEMEN)
         {
+            Initialize();
             id = Horsemen(0);
             for (uint8 i = 0; i < 4; ++i)
                 if (me->GetEntry() == NPC_HORSEMEN[i])
                     id = Horsemen(i);
             caster = (id == HORSEMEN_LADY || id == HORSEMEN_SIR);
+        }
+
+        void Initialize()
+        {
+            uiEventStarterGUID = 0;
+            nextWP = 0;
+            punishTimer = 2000;
+            nextMovementStarted = false;
+            movementCompleted = false;
+            movementStarted = false;
+            encounterActionAttack = false;
             encounterActionReset = false;
+            doDelayPunish = false;
         }
 
         Horsemen id;
@@ -124,15 +137,7 @@ public:
             instance->SetData(DATA_HORSEMEN0 + id, NOT_STARTED);
 
             me->SetReactState(REACT_AGGRESSIVE);
-            uiEventStarterGUID = 0;
-            nextWP = 0;
-            punishTimer = 2000;
-            nextMovementStarted = false;
-            movementCompleted = false;
-            movementStarted = false;
-            encounterActionAttack = false;
-            encounterActionReset = false;
-            doDelayPunish = false;
+            Initialize();
             _Reset();
         }
 
diff --git a/src/server/scripts/Northrend/Naxxramas/boss_gothik.cpp b/src/server/scripts/Northrend/Naxxramas/boss_gothik.cpp
index 648fc3c87d2..de9d85db70b 100644
--- a/src/server/scripts/Northrend/Naxxramas/boss_gothik.cpp
+++ b/src/server/scripts/Northrend/Naxxramas/boss_gothik.cpp
@@ -162,7 +162,18 @@ class boss_gothik : public CreatureScript
 
         struct boss_gothikAI : public BossAI
         {
-            boss_gothikAI(Creature* creature) : BossAI(creature, BOSS_GOTHIK) { }
+            boss_gothikAI(Creature* creature) : BossAI(creature, BOSS_GOTHIK)
+            {
+                Initialize();
+                waveCount = 0;
+            }
+
+            void Initialize()
+            {
+                mergedSides = false;
+                phaseTwo = false;
+                thirtyPercentReached = false;
+            }
 
             uint32 waveCount;
             typedef std::vector<Creature*> TriggerVct;
@@ -182,9 +193,7 @@ class boss_gothik : public CreatureScript
                 me->SetReactState(REACT_PASSIVE);
                 instance->SetData(DATA_GOTHIK_GATE, GO_STATE_ACTIVE);
                 _Reset();
-                mergedSides = false;
-                phaseTwo = false;
-                thirtyPercentReached = false;
+                Initialize();
             }
 
             void EnterCombat(Unit* /*who*/) override
diff --git a/src/server/scripts/Northrend/Naxxramas/boss_heigan.cpp b/src/server/scripts/Northrend/Naxxramas/boss_heigan.cpp
index 648da29ca66..2d0e8a6d2b2 100644
--- a/src/server/scripts/Northrend/Naxxramas/boss_heigan.cpp
+++ b/src/server/scripts/Northrend/Naxxramas/boss_heigan.cpp
@@ -66,7 +66,13 @@ public:
 
     struct boss_heiganAI : public BossAI
     {
-        boss_heiganAI(Creature* creature) : BossAI(creature, BOSS_HEIGAN) { }
+        boss_heiganAI(Creature* creature) : BossAI(creature, BOSS_HEIGAN)
+        {
+            eruptSection = 0;
+            eruptDirection = false;
+            safetyDance = false;
+            phase = PHASE_FIGHT;
+        }
 
         uint32 eruptSection;
         bool eruptDirection;
diff --git a/src/server/scripts/Northrend/Naxxramas/boss_kelthuzad.cpp b/src/server/scripts/Northrend/Naxxramas/boss_kelthuzad.cpp
index 61ee650b37a..1c4320fd48b 100644
--- a/src/server/scripts/Northrend/Naxxramas/boss_kelthuzad.cpp
+++ b/src/server/scripts/Northrend/Naxxramas/boss_kelthuzad.cpp
@@ -263,9 +263,20 @@ public:
     {
         boss_kelthuzadAI(Creature* creature) : BossAI(creature, BOSS_KELTHUZAD), spawns(creature)
         {
+            Initialize();
             uiFaction = me->getFaction();
         }
 
+        void Initialize()
+        {
+            nGuardiansOfIcecrownCount = 0;
+            uiGuardiansOfIcecrownTimer = 5000; // 5 seconds for summoning each Guardian of Icecrown in phase 3
+
+            Phase = 0;
+            nAbomination = 0;
+            nWeaver = 0;
+        }
+
         uint32 Phase;
         uint32 uiGuardiansOfIcecrownTimer;
         uint32 uiFaction;
@@ -315,12 +326,7 @@ public:
                         portal->ResetDoorOrButton();
             }
 
-            nGuardiansOfIcecrownCount = 0;
-            uiGuardiansOfIcecrownTimer = 5000; // 5 seconds for summoning each Guardian of Icecrown in phase 3
-
-            Phase = 0;
-            nAbomination = 0;
-            nWeaver = 0;
+            Initialize();
         }
 
         void KilledUnit(Unit* /*victim*/) override
diff --git a/src/server/scripts/Northrend/Naxxramas/boss_loatheb.cpp b/src/server/scripts/Northrend/Naxxramas/boss_loatheb.cpp
index 9987802a165..736941949d1 100644
--- a/src/server/scripts/Northrend/Naxxramas/boss_loatheb.cpp
+++ b/src/server/scripts/Northrend/Naxxramas/boss_loatheb.cpp
@@ -60,15 +60,21 @@ class boss_loatheb : public CreatureScript
         {
             boss_loathebAI(Creature* creature) : BossAI(creature, BOSS_LOATHEB)
             {
+                Initialize();
             }
 
-            void Reset() override
+            void Initialize()
             {
-                _Reset();
                 _doomCounter = 0;
                 _sporeLoserData = true;
             }
 
+            void Reset() override
+            {
+                _Reset();
+                Initialize();
+            }
+
             void EnterCombat(Unit* /*who*/) override
             {
                 _EnterCombat();
diff --git a/src/tools/vmap4_extractor/model.cpp b/src/tools/vmap4_extractor/model.cpp
index 519f59cb086..64b2923b345 100644
--- a/src/tools/vmap4_extractor/model.cpp
+++ b/src/tools/vmap4_extractor/model.cpp
@@ -143,7 +143,7 @@ Vec3D fixCoordSystem2(Vec3D v)
 }
 
 ModelInstance::ModelInstance(MPQFile& f, char const* ModelInstName, uint32 mapID, uint32 tileX, uint32 tileY, FILE *pDirfile)
-    : scale(0), flags(0)
+    : id(0), scale(0), flags(0)
 {
     float ff[3];
     f.read(&id, 4);