Core/Unit: For convenience, explicitly redirect CastSpell with nullptr as first argument to the Unit* overloads. No more ->CastSpell((Unit*)nullptr, ...) all over the place!

21 files changed, 64 insertions, 64 deletions

diff --git a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_halion.cpp b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_halion.cpp
index 472dc16191f..a1a21496ae6 100644
--- a/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_halion.cpp
+++ b/src/server/scripts/Northrend/ChamberOfAspects/RubySanctum/boss_halion.cpp
@@ -733,7 +733,7 @@ class npc_halion_controller : public CreatureScript
                         case EVENT_TWILIGHT_MENDING:
                             if (_instance->GetCreature(DATA_HALION)) // Just check if physical Halion is spawned
                                 if (Creature* twilightHalion = _instance->GetCreature(DATA_TWILIGHT_HALION))
-                                    twilightHalion->CastSpell((Unit*)nullptr, SPELL_TWILIGHT_MENDING, true);
+                                    twilightHalion->CastSpell(nullptr, SPELL_TWILIGHT_MENDING, true);
                             break;
                         case EVENT_TRIGGER_BERSERK:
                             for (uint8 i = DATA_HALION; i <= DATA_TWILIGHT_HALION; i++)
@@ -921,7 +921,7 @@ class npc_orb_carrier : public CreatureScript
                 /// However, refreshing it looks bad, so just cast the spell if
                 /// we are not channeling it.
                 if (!me->HasUnitState(UNIT_STATE_CASTING))
-                    me->CastSpell((Unit*)nullptr, SPELL_TRACK_ROTATION, false);
+                    me->CastSpell(nullptr, SPELL_TRACK_ROTATION, false);
 
                 scheduler.Update(diff);
 
diff --git a/src/server/scripts/Northrend/DraktharonKeep/boss_novos.cpp b/src/server/scripts/Northrend/DraktharonKeep/boss_novos.cpp
index 2bcfd7a70d6..bbfc6ac0924 100644
--- a/src/server/scripts/Northrend/DraktharonKeep/boss_novos.cpp
+++ b/src/server/scripts/Northrend/DraktharonKeep/boss_novos.cpp
@@ -243,7 +243,7 @@ public:
             if (Creature* crystalChannelTarget = crystal->FindNearestCreature(NPC_CRYSTAL_CHANNEL_TARGET, 5.0f))
             {
                 if (active)
-                    crystalChannelTarget->CastSpell((Unit*)nullptr, SPELL_BEAM_CHANNEL);
+                    crystalChannelTarget->CastSpell(nullptr, SPELL_BEAM_CHANNEL);
                 else if (crystalChannelTarget->HasUnitState(UNIT_STATE_CASTING))
                     crystalChannelTarget->CastStop();
             }
@@ -384,7 +384,7 @@ class spell_novos_summon_minions : public SpellScriptLoader
             void HandleScript(SpellEffIndex /*effIndex*/)
             {
                 for (uint8 i = 0; i < 2; ++i)
-                    GetCaster()->CastSpell((Unit*)nullptr, SPELL_SUMMON_COPY_OF_MINIONS, true);
+                    GetCaster()->CastSpell(nullptr, SPELL_SUMMON_COPY_OF_MINIONS, true);
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_bronjahm.cpp b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_bronjahm.cpp
index abab9f7ead7..e0ac981b69c 100644
--- a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_bronjahm.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_bronjahm.cpp
@@ -246,7 +246,7 @@ class npc_corrupted_soul_fragment : public CreatureScript
                 if (instance->GetGuidData(DATA_BRONJAHM).GetCounter() != id)
                     return;
 
-                me->CastSpell((Unit*)nullptr, SPELL_CONSUME_SOUL, true);
+                me->CastSpell(nullptr, SPELL_CONSUME_SOUL, true);
                 me->DespawnOrUnsummon();
             }
 
diff --git a/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/halls_of_reflection.cpp b/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/halls_of_reflection.cpp
index 7d620ae5a60..0545d3d19f6 100644
--- a/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/halls_of_reflection.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/halls_of_reflection.cpp
@@ -2824,9 +2824,9 @@ class spell_hor_gunship_cannon_fire : public SpellScriptLoader
                 if (!urand(0, 2))
                 {
                     if (GetTarget()->GetEntry() == NPC_GUNSHIP_CANNON_HORDE)
-                        GetTarget()->CastSpell((Unit*)nullptr, SPELL_GUNSHIP_CANNON_FIRE_MISSILE_HORDE, true);
+                        GetTarget()->CastSpell(nullptr, SPELL_GUNSHIP_CANNON_FIRE_MISSILE_HORDE, true);
                     else
-                        GetTarget()->CastSpell((Unit*)nullptr, SPELL_GUNSHIP_CANNON_FIRE_MISSILE_ALLIANCE, true);
+                        GetTarget()->CastSpell(nullptr, SPELL_GUNSHIP_CANNON_FIRE_MISSILE_ALLIANCE, true);
                 }
             }
 
diff --git a/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/instance_halls_of_reflection.cpp b/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/instance_halls_of_reflection.cpp
index 89f95a32cc8..ab439788c90 100644
--- a/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/instance_halls_of_reflection.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/HallsOfReflection/instance_halls_of_reflection.cpp
@@ -346,7 +346,7 @@ class instance_halls_of_reflection : public InstanceMapScript
 
                                 if (Creature* lichking = instance->GetCreature(TheLichKingEscapeGUID))
                                 {
-                                    lichking->CastSpell((Unit*)nullptr, SPELL_ACHIEV_CHECK, true);
+                                    lichking->CastSpell(nullptr, SPELL_ACHIEV_CHECK, true);
                                     lichking->DespawnOrUnsummon(1);
                                 }
                                 break;
@@ -453,7 +453,7 @@ class instance_halls_of_reflection : public InstanceMapScript
                             if (_quelDelarState == NOT_STARTED)
                             {
                                 if (Creature* bunny = instance->GetCreature(FrostmourneAltarBunnyGUID))
-                                    bunny->CastSpell((Unit*)nullptr, SPELL_ESSENCE_OF_CAPTURED);
+                                    bunny->CastSpell(nullptr, SPELL_ESSENCE_OF_CAPTURED);
                                 events.ScheduleEvent(EVENT_QUEL_DELAR_SUMMON_UTHER, 2000);
                             }
                         }
diff --git a/src/server/scripts/Northrend/Gundrak/instance_gundrak.cpp b/src/server/scripts/Northrend/Gundrak/instance_gundrak.cpp
index c9e5848d2f5..4bd67f3e232 100644
--- a/src/server/scripts/Northrend/Gundrak/instance_gundrak.cpp
+++ b/src/server/scripts/Northrend/Gundrak/instance_gundrak.cpp
@@ -322,7 +322,7 @@ class instance_gundrak : public InstanceMapScript
 
                     if (GameObject* altar = GetGameObject(altarId))
                         if (Creature* trigger = altar->FindNearestCreature(NPC_ALTAR_TRIGGER, 10.0f))
-                            trigger->CastSpell((Unit*)nullptr, spellId, true);
+                            trigger->CastSpell(nullptr, spellId, true);
 
                     // eventId equals statueId
                     ToggleGameObject(eventId, GO_STATE_READY);
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
index b23b3ca9917..e19b4187138 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
@@ -1118,7 +1118,7 @@ class spell_putricide_ooze_tank_protection : public SpellScriptLoader
                 PreventDefaultAction();
 
                 Unit* actionTarget = eventInfo.GetActionTarget();
-                actionTarget->CastSpell((Unit*)nullptr, GetSpellInfo()->Effects[aurEff->GetEffIndex()].TriggerSpell, true, nullptr, aurEff);
+                actionTarget->CastSpell(nullptr, GetSpellInfo()->Effects[aurEff->GetEffIndex()].TriggerSpell, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp
index 370578a3c47..10bec252817 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp
@@ -194,7 +194,7 @@ class FrostBombExplosion : public BasicEvent
 
         bool Execute(uint64 /*eventTime*/, uint32 /*updateTime*/) override
         {
-            _owner->CastSpell((Unit*)nullptr, SPELL_FROST_BOMB, false, nullptr, nullptr, _sindragosaGUID);
+            _owner->CastSpell(nullptr, SPELL_FROST_BOMB, false, nullptr, nullptr, _sindragosaGUID);
             _owner->RemoveAurasDueToSpell(SPELL_FROST_BOMB_VISUAL);
             return true;
         }
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 d00e56606b5..a52d9f9fb4f 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp
@@ -472,7 +472,7 @@ class VileSpiritActivateEvent : public BasicEvent
         {
             _owner->SetReactState(REACT_AGGRESSIVE);
             _owner->CastSpell(_owner, SPELL_VILE_SPIRIT_MOVE_SEARCH, true);
-            _owner->CastSpell((Unit*)nullptr, SPELL_VILE_SPIRIT_DAMAGE_SEARCH, true);
+            _owner->CastSpell(nullptr, SPELL_VILE_SPIRIT_DAMAGE_SEARCH, true);
             return true;
         }
 
@@ -626,8 +626,8 @@ class boss_the_lich_king : public CreatureScript
                         me->GetMap()->SetZoneOverrideLight(AREA_ICECROWN_CITADEL, 0, 5000);
                         break;
                     case ACTION_BREAK_FROSTMOURNE:
-                        me->CastSpell((Unit*)nullptr, SPELL_SUMMON_BROKEN_FROSTMOURNE, TRIGGERED_IGNORE_CAST_IN_PROGRESS);
-                        me->CastSpell((Unit*)nullptr, SPELL_SUMMON_BROKEN_FROSTMOURNE_2, TRIGGERED_IGNORE_CAST_IN_PROGRESS);
+                        me->CastSpell(nullptr, SPELL_SUMMON_BROKEN_FROSTMOURNE, TRIGGERED_IGNORE_CAST_IN_PROGRESS);
+                        me->CastSpell(nullptr, SPELL_SUMMON_BROKEN_FROSTMOURNE_2, TRIGGERED_IGNORE_CAST_IN_PROGRESS);
                         SetEquipmentSlots(false, EQUIP_BROKEN_FROSTMOURNE);
                         events.ScheduleEvent(EVENT_OUTRO_TALK_6, 2500, 0, PHASE_OUTRO);
                         break;
@@ -709,7 +709,7 @@ class boss_the_lich_king : public CreatureScript
                     summons.DespawnAll();
                     me->GetMap()->SetZoneMusic(AREA_ICECROWN_CITADEL, MUSIC_FURY_OF_FROSTMOURNE);
                     me->InterruptNonMeleeSpells(true);
-                    me->CastSpell((Unit*)nullptr, SPELL_FURY_OF_FROSTMOURNE, TRIGGERED_NONE);
+                    me->CastSpell(nullptr, SPELL_FURY_OF_FROSTMOURNE, TRIGGERED_NONE);
                     me->SetWalk(true);
                     events.ScheduleEvent(EVENT_OUTRO_TALK_1, 2600, 0, PHASE_OUTRO);
                     events.ScheduleEvent(EVENT_OUTRO_EMOTE_TALK, 6600, 0, PHASE_OUTRO);
@@ -756,7 +756,7 @@ class boss_the_lich_king : public CreatureScript
                         break;
                     case NPC_FROSTMOURNE_TRIGGER:
                     {
-                        summon->CastSpell((Unit*)nullptr, SPELL_BROKEN_FROSTMOURNE, true);
+                        summon->CastSpell(nullptr, SPELL_BROKEN_FROSTMOURNE, true);
 
                         me->GetMap()->SetZoneOverrideLight(AREA_ICECROWN_CITADEL, LIGHT_SOULSTORM, 10000);
                         me->GetMap()->SetZoneWeather(AREA_ICECROWN_CITADEL, WEATHER_STATE_BLACKSNOW, 0.5f);
@@ -1119,11 +1119,11 @@ class boss_the_lich_king : public CreatureScript
                             Talk(SAY_LK_OUTRO_6);
                             if (Creature* tirion = ObjectAccessor::GetCreature(*me, instance->GetGuidData(DATA_HIGHLORD_TIRION_FORDRING)))
                                 tirion->SetFacingToObject(me);
-                            me->CastSpell((Unit*)nullptr, SPELL_SUMMON_BROKEN_FROSTMOURNE_3, TRIGGERED_IGNORE_CAST_IN_PROGRESS);
+                            me->CastSpell(nullptr, SPELL_SUMMON_BROKEN_FROSTMOURNE_3, TRIGGERED_IGNORE_CAST_IN_PROGRESS);
                             SetEquipmentSlots(false, EQUIP_UNEQUIP);
                             break;
                         case EVENT_OUTRO_SOUL_BARRAGE:
-                            me->CastSpell((Unit*)nullptr, SPELL_SOUL_BARRAGE, TRIGGERED_IGNORE_CAST_IN_PROGRESS);
+                            me->CastSpell(nullptr, SPELL_SOUL_BARRAGE, TRIGGERED_IGNORE_CAST_IN_PROGRESS);
                             sCreatureTextMgr->SendSound(me, SOUND_PAIN, CHAT_MSG_MONSTER_YELL, 0, TEXT_RANGE_NORMAL, TEAM_OTHER, false);
                             // set flight
                             me->SetDisableGravity(true);
@@ -1693,7 +1693,7 @@ class npc_strangulate_vehicle : public CreatureScript
                             {
                                 if (Unit* summoner = summ->GetSummoner())
                                 {
-                                    summoner->CastSpell((Unit*)nullptr, SPELL_HARVEST_SOUL_VISUAL, true);
+                                    summoner->CastSpell(nullptr, SPELL_HARVEST_SOUL_VISUAL, true);
                                     summoner->ExitVehicle(summoner);
                                     if (!IsHeroic())
                                         summoner->CastSpell(summoner, SPELL_HARVEST_SOUL_TELEPORT, true);
@@ -1775,7 +1775,7 @@ class npc_terenas_menethil : public CreatureScript
                         }
                         break;
                     case ACTION_TELEPORT_BACK:
-                        me->CastSpell((Unit*)nullptr, SPELL_RESTORE_SOUL, TRIGGERED_NONE);
+                        me->CastSpell(nullptr, SPELL_RESTORE_SOUL, TRIGGERED_NONE);
                         me->DespawnOrUnsummon(3000);
                         break;
                     default:
@@ -1805,7 +1805,7 @@ class npc_terenas_menethil : public CreatureScript
                         _events.ScheduleEvent(EVENT_TELEPORT_BACK, 1000);
                         if (Creature* warden = me->FindNearestCreature(NPC_SPIRIT_WARDEN, 20.0f))
                         {
-                            warden->CastSpell((Unit*)nullptr, SPELL_DESTROY_SOUL, TRIGGERED_NONE);
+                            warden->CastSpell(nullptr, SPELL_DESTROY_SOUL, TRIGGERED_NONE);
                             warden->DespawnOrUnsummon(2000);
                         }
 
@@ -1863,7 +1863,7 @@ class npc_terenas_menethil : public CreatureScript
                         case EVENT_DESTROY_SOUL:
                             me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NOT_SELECTABLE);
                             if (Creature* warden = me->FindNearestCreature(NPC_SPIRIT_WARDEN, 20.0f))
-                                warden->CastSpell((Unit*)nullptr, SPELL_DESTROY_SOUL, TRIGGERED_NONE);
+                                warden->CastSpell(nullptr, SPELL_DESTROY_SOUL, TRIGGERED_NONE);
                             DoCast(SPELL_TERENAS_LOSES_INSIDE);
                             _events.ScheduleEvent(EVENT_TELEPORT_BACK, 1000);
                             break;
@@ -2318,7 +2318,7 @@ class spell_the_lich_king_shadow_trap_periodic : public SpellScriptLoader
                 if (targets.empty())
                     return;
 
-                GetCaster()->CastSpell((Unit*)nullptr, SPELL_SHADOW_TRAP_KNOCKBACK, true);
+                GetCaster()->CastSpell(nullptr, SPELL_SHADOW_TRAP_KNOCKBACK, true);
             }
 
             void Register() override
@@ -2700,7 +2700,7 @@ class spell_the_lich_king_vile_spirits : public SpellScriptLoader
             void OnPeriodic(AuraEffect const* aurEff)
             {
                 if (_is25Man || ((aurEff->GetTickNumber() - 1) % 5))
-                    GetTarget()->CastSpell((Unit*)nullptr, GetSpellInfo()->Effects[aurEff->GetEffIndex()].TriggerSpell, true, nullptr, aurEff, GetCasterGUID());
+                    GetTarget()->CastSpell(nullptr, GetSpellInfo()->Effects[aurEff->GetEffIndex()].TriggerSpell, true, nullptr, aurEff, GetCasterGUID());
             }
 
             void Register() override
@@ -2823,7 +2823,7 @@ class spell_the_lich_king_vile_spirit_damage_target_search : public SpellScriptL
                 if (TempSummon* summon = GetCaster()->ToTempSummon())
                     if (Unit* summoner = summon->GetSummoner())
                         summoner->GetAI()->SetData(DATA_VILE, 1);
-                GetCaster()->CastSpell((Unit*)nullptr, SPELL_SPIRIT_BURST, true);
+                GetCaster()->CastSpell(nullptr, SPELL_SPIRIT_BURST, true);
                 GetCaster()->ToCreature()->DespawnOrUnsummon(3000);
                 GetCaster()->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NOT_SELECTABLE);
             }
@@ -2858,7 +2858,7 @@ class spell_the_lich_king_harvest_soul : public SpellScriptLoader
             {
                 // m_originalCaster to allow stacking from different casters, meh
                 if (GetTargetApplication()->GetRemoveMode() == AURA_REMOVE_BY_DEATH)
-                    GetTarget()->CastSpell((Unit*)nullptr, SPELL_HARVESTED_SOUL, true, nullptr, nullptr, GetTarget()->GetInstanceScript()->GetGuidData(DATA_THE_LICH_KING));
+                    GetTarget()->CastSpell(nullptr, SPELL_HARVESTED_SOUL, true, nullptr, nullptr, GetTarget()->GetInstanceScript()->GetGuidData(DATA_THE_LICH_KING));
             }
 
             void Register() override
@@ -3054,7 +3054,7 @@ class spell_the_lich_king_in_frostmourne_room : public SpellScriptLoader
             {
                 // m_originalCaster to allow stacking from different casters, meh
                 if (GetTargetApplication()->GetRemoveMode() == AURA_REMOVE_BY_DEATH)
-                    GetTarget()->CastSpell((Unit*)nullptr, SPELL_HARVESTED_SOUL, true, nullptr, nullptr, GetTarget()->GetInstanceScript()->GetGuidData(DATA_THE_LICH_KING));
+                    GetTarget()->CastSpell(nullptr, SPELL_HARVESTED_SOUL, true, nullptr, nullptr, GetTarget()->GetInstanceScript()->GetGuidData(DATA_THE_LICH_KING));
             }
 
             void Register() override
@@ -3081,7 +3081,7 @@ class spell_the_lich_king_summon_spirit_bomb : public SpellScriptLoader
             void HandleScript(SpellEffIndex effIndex)
             {
                 PreventHitDefaultEffect(effIndex);
-                GetHitUnit()->CastSpell((Unit*)nullptr, uint32(GetEffectValue()), true);
+                GetHitUnit()->CastSpell(nullptr, uint32(GetEffectValue()), true);
             }
 
             void Register() override
@@ -3139,7 +3139,7 @@ class spell_the_lich_king_jump : public SpellScriptLoader
             {
                 PreventHitDefaultEffect(effIndex);
                 GetHitUnit()->RemoveAurasDueToSpell(SPELL_RAISE_DEAD);
-                GetHitUnit()->CastSpell((Unit*)nullptr, SPELL_JUMP_2, true);
+                GetHitUnit()->CastSpell(nullptr, SPELL_JUMP_2, true);
                 if (Creature* creature = GetHitCreature())
                     creature->AI()->DoAction(ACTION_BREAK_FROSTMOURNE);
             }
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_valithria_dreamwalker.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_valithria_dreamwalker.cpp
index 493b759e0f7..89bc369fd6f 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_valithria_dreamwalker.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_valithria_dreamwalker.cpp
@@ -1467,7 +1467,7 @@ class spell_dreamwalker_twisted_nightmares : public SpellScriptLoader
                 //    return;
 
                 if (InstanceScript* instance = GetHitUnit()->GetInstanceScript())
-                    GetHitUnit()->CastSpell((Unit*)nullptr, GetSpellInfo()->Effects[effIndex].TriggerSpell, true, nullptr, nullptr, instance->GetGuidData(DATA_VALITHRIA_DREAMWALKER));
+                    GetHitUnit()->CastSpell(nullptr, GetSpellInfo()->Effects[effIndex].TriggerSpell, true, nullptr, nullptr, instance->GetGuidData(DATA_VALITHRIA_DREAMWALKER));
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp b/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
index ffc899b4d0d..53caf9fda7a 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
@@ -1308,7 +1308,7 @@ class instance_icecrown_citadel : public InstanceMapScript
                             return;
 
                         stalkers.sort(Trinity::ObjectDistanceOrderPred(teleporter));
-                        stalkers.front()->CastSpell((Unit*)nullptr, SPELL_ARTHAS_TELEPORTER_CEREMONY, false);
+                        stalkers.front()->CastSpell(nullptr, SPELL_ARTHAS_TELEPORTER_CEREMONY, false);
                         stalkers.pop_front();
                         for (std::list<Creature*>::iterator itr = stalkers.begin(); itr != stalkers.end(); ++itr)
                             (*itr)->AI()->Reset();
diff --git a/src/server/scripts/Northrend/Nexus/EyeOfEternity/boss_malygos.cpp b/src/server/scripts/Northrend/Nexus/EyeOfEternity/boss_malygos.cpp
index 8e51d79a87b..a7ea5b57fb0 100644
--- a/src/server/scripts/Northrend/Nexus/EyeOfEternity/boss_malygos.cpp
+++ b/src/server/scripts/Northrend/Nexus/EyeOfEternity/boss_malygos.cpp
@@ -2142,7 +2142,7 @@ class spell_alexstrasza_bunny_destroy_platform_event : public SpellScriptLoader
 
             void HandleScript(SpellEffIndex /*effIndex*/)
             {
-                GetCaster()->CastSpell((Unit*)nullptr, SPELL_SUMMON_RED_DRAGON_BUDDY_F_CAST);
+                GetCaster()->CastSpell(nullptr, SPELL_SUMMON_RED_DRAGON_BUDDY_F_CAST);
             }
 
             void Register() override
@@ -2271,7 +2271,7 @@ class spell_malygos_surge_of_power_warning_selector_25 : public SpellScriptLoade
 
             void ExecuteMainSpell()
             {
-                GetCaster()->ToCreature()->CastSpell((Unit*)nullptr, SPELL_SURGE_OF_POWER_PHASE_3_25);
+                GetCaster()->ToCreature()->CastSpell(nullptr, SPELL_SURGE_OF_POWER_PHASE_3_25);
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/Ulduar/HallsOfStone/boss_krystallus.cpp b/src/server/scripts/Northrend/Ulduar/HallsOfStone/boss_krystallus.cpp
index 338b273808f..a98fadd56d9 100644
--- a/src/server/scripts/Northrend/Ulduar/HallsOfStone/boss_krystallus.cpp
+++ b/src/server/scripts/Northrend/Ulduar/HallsOfStone/boss_krystallus.cpp
@@ -156,7 +156,7 @@ class spell_krystallus_shatter : public SpellScriptLoader
                 if (Unit* target = GetHitUnit())
                 {
                     target->RemoveAurasDueToSpell(SPELL_STONED);
-                    target->CastSpell((Unit*)nullptr, SPELL_SHATTER_EFFECT, true);
+                    target->CastSpell(nullptr, SPELL_SHATTER_EFFECT, true);
                 }
             }
 
diff --git a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_algalon_the_observer.cpp b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_algalon_the_observer.cpp
index 69d5fa4d2fb..868e337933d 100644
--- a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_algalon_the_observer.cpp
+++ b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_algalon_the_observer.cpp
@@ -254,7 +254,7 @@ class ActivateLivingConstellation : public BasicEvent
             if (!_instance || _instance->GetBossState(BOSS_ALGALON) != IN_PROGRESS)
                 return true;    // delete event
 
-            _owner->CastSpell((Unit*)nullptr, SPELL_TRIGGER_3_ADDS, TRIGGERED_FULL_MASK);
+            _owner->CastSpell(nullptr, SPELL_TRIGGER_3_ADDS, TRIGGERED_FULL_MASK);
             _owner->m_Events.AddEvent(this, execTime + urand(45000, 50000));
             return false;
         }
@@ -273,7 +273,7 @@ class CosmicSmashDamageEvent : public BasicEvent
 
         bool Execute(uint64 /*execTime*/, uint32 /*diff*/) override
         {
-            _caster->CastSpell((Unit*)nullptr, SPELL_COSMIC_SMASH_TRIGGERED, TRIGGERED_FULL_MASK);
+            _caster->CastSpell(nullptr, SPELL_COSMIC_SMASH_TRIGGERED, TRIGGERED_FULL_MASK);
             return true;
         }
 
@@ -290,7 +290,7 @@ class SummonUnleashedDarkMatter : public BasicEvent
 
         bool Execute(uint64 execTime, uint32 /*diff*/) override
         {
-            _caster->CastSpell((Unit*)nullptr, SPELL_SUMMON_UNLEASHED_DARK_MATTER, TRIGGERED_FULL_MASK);
+            _caster->CastSpell(nullptr, SPELL_SUMMON_UNLEASHED_DARK_MATTER, TRIGGERED_FULL_MASK);
             _caster->m_Events.AddEvent(this, execTime + 30000);
             return false;
         }
@@ -474,9 +474,9 @@ class boss_algalon_the_observer : public CreatureScript
                         break;
                     case NPC_BLACK_HOLE:
                         summon->SetReactState(REACT_PASSIVE);
-                        summon->CastSpell((Unit*)nullptr, SPELL_BLACK_HOLE_TRIGGER, TRIGGERED_FULL_MASK);
+                        summon->CastSpell(nullptr, SPELL_BLACK_HOLE_TRIGGER, TRIGGERED_FULL_MASK);
                         summon->CastSpell(summon, SPELL_CONSTELLATION_PHASE_TRIGGER, TRIGGERED_FULL_MASK);
-                        summon->CastSpell((Unit*)nullptr, SPELL_BLACK_HOLE_EXPLOSION);
+                        summon->CastSpell(nullptr, SPELL_BLACK_HOLE_EXPLOSION);
                         summon->CastSpell(summon, SPELL_SUMMON_VOID_ZONE_VISUAL, TRIGGERED_FULL_MASK);
                         break;
                     case NPC_ALGALON_VOID_ZONE_VISUAL_STALKER:
@@ -787,7 +787,7 @@ class npc_living_constellation : public CreatureScript
                 me->DespawnOrUnsummon(1);
                 if (InstanceScript* instance = me->GetInstanceScript())
                     instance->DoStartTimedAchievement(ACHIEVEMENT_TIMED_TYPE_EVENT, EVENT_ID_SUPERMASSIVE_START);
-                caster->CastSpell((Unit*)nullptr, SPELL_BLACK_HOLE_CREDIT, TRIGGERED_FULL_MASK);
+                caster->CastSpell(nullptr, SPELL_BLACK_HOLE_CREDIT, TRIGGERED_FULL_MASK);
                 caster->ToCreature()->DespawnOrUnsummon(1);
             }
 
diff --git a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_freya.cpp b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_freya.cpp
index fe0539fc407..8b5039b8326 100644
--- a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_freya.cpp
+++ b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_freya.cpp
@@ -610,7 +610,7 @@ class boss_freya : public CreatureScript
                     /* 25N */    {62955, 62956, 62957, 62958}
                 };
 
-                me->CastSpell((Unit*)nullptr, summonSpell[me->GetMap()->GetDifficulty()][elderCount], true);
+                me->CastSpell(nullptr, summonSpell[me->GetMap()->GetDifficulty()][elderCount], true);
 
                 Talk(SAY_DEATH);
 
diff --git a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_mimiron.cpp b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_mimiron.cpp
index 3b95b36c375..8200ea8ca06 100644
--- a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_mimiron.cpp
+++ b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_mimiron.cpp
@@ -2129,7 +2129,7 @@ class spell_mimiron_proximity_trigger : public SpellScriptLoader
 
             void HandleDummy(SpellEffIndex /*effIndex*/)
             {
-                GetCaster()->CastSpell((Unit*)nullptr, SPELL_PROXIMITY_MINE_EXPLOSION, true);
+                GetCaster()->CastSpell(nullptr, SPELL_PROXIMITY_MINE_EXPLOSION, true);
             }
 
             void Register() override
@@ -2215,7 +2215,7 @@ class spell_mimiron_rocket_strike : public SpellScriptLoader
 
             void HandleDummy(SpellEffIndex /*effIndex*/)
             {
-                GetHitUnit()->CastSpell((Unit*)nullptr, SPELL_SCRIPT_EFFECT_ROCKET_STRIKE, true, nullptr, nullptr, GetCaster()->GetGUID());
+                GetHitUnit()->CastSpell(nullptr, SPELL_SCRIPT_EFFECT_ROCKET_STRIKE, true, nullptr, nullptr, GetCaster()->GetGUID());
             }
 
             void Register() override
@@ -2262,7 +2262,7 @@ class spell_mimiron_rocket_strike_damage : public SpellScriptLoader
 
             void HandleFriendlyFire(SpellEffIndex /*effIndex*/)
             {
-                GetHitUnit()->CastSpell((Unit*)nullptr, SPELL_NOT_SO_FRIENDLY_FIRE, true);
+                GetHitUnit()->CastSpell(nullptr, SPELL_NOT_SO_FRIENDLY_FIRE, true);
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_thorim.cpp b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_thorim.cpp
index 9c6cffcba13..8b618c8b271 100644
--- a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_thorim.cpp
+++ b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_thorim.cpp
@@ -375,7 +375,7 @@ class RunicSmashExplosionEvent : public BasicEvent
 
         bool Execute(uint64 /*eventTime*/, uint32 /*updateTime*/) override
         {
-            _owner->CastSpell((Unit*)nullptr, SPELL_RUNIC_SMASH);
+            _owner->CastSpell(nullptr, SPELL_RUNIC_SMASH);
             return true;
         }
 
@@ -393,7 +393,7 @@ class TrashJumpEvent : public BasicEvent
             switch (_stage)
             {
                 case 0:
-                    _owner->CastSpell((Unit*)nullptr, SPELL_LEAP);
+                    _owner->CastSpell(nullptr, SPELL_LEAP);
                     ++_stage;
                     _owner->m_Events.AddEvent(this, eventTime + 2000);
                     return false;
@@ -425,7 +425,7 @@ class LightningFieldEvent : public BasicEvent
             {
                 if (instance->GetBossState(BOSS_THORIM) == IN_PROGRESS)
                 {
-                    _owner->CastSpell((Unit*)nullptr, SPELL_LIGHTNING_FIELD);
+                    _owner->CastSpell(nullptr, SPELL_LIGHTNING_FIELD);
                     _owner->m_Events.AddEvent(this, eventTime + 1000);
                     return false;
                 }
@@ -515,7 +515,7 @@ class boss_thorim : public CreatureScript
                     if (Creature* pillar = ObjectAccessor::GetCreature(*me, _activePillarGUID))
                     {
                         pillar->CastSpell(pillar, SPELL_LIGHTNING_ORB_CHARGED, true);
-                        pillar->CastSpell((Unit*)nullptr, SPELL_LIGHTNING_PILLAR_2);
+                        pillar->CastSpell(nullptr, SPELL_LIGHTNING_PILLAR_2);
                         events.ScheduleEvent(EVENT_LIGHTNING_CHARGE, 8000, 0, PHASE_2);
                     }
                 }
@@ -1778,7 +1778,7 @@ class spell_thorim_charge_orb : public SpellScriptLoader
             void HandleScript()
             {
                 if (Unit* target = GetHitUnit())
-                    target->CastSpell((Unit*)nullptr, SPELL_LIGHTNING_PILLAR_1, true);
+                    target->CastSpell(nullptr, SPELL_LIGHTNING_PILLAR_1, true);
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp
index c3817b0525b..2dbc0d0dfbb 100644
--- a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp
+++ b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp
@@ -558,7 +558,7 @@ class boss_voice_of_yogg_saron : public CreatureScript
                             if (Creature* yogg = instance->GetCreature(BOSS_YOGG_SARON))
                             {
                                 yogg->AI()->Talk(EMOTE_YOGG_SARON_EXTINGUISH_ALL_LIFE, me);
-                                yogg->CastSpell((Unit*)nullptr, SPELL_EXTINGUISH_ALL_LIFE, true);
+                                yogg->CastSpell(nullptr, SPELL_EXTINGUISH_ALL_LIFE, true);
                             }
                             events.ScheduleEvent(EVENT_EXTINGUISH_ALL_LIFE, 10000);    // cast it again after a short while, players can survive
                             break;
@@ -2340,7 +2340,7 @@ class spell_yogg_saron_empowering_shadows_missile : public SpellScriptLoader
             void HandleScript(SpellEffIndex /*effIndex*/)
             {
                 if (Unit* target = GetHitUnit())
-                    target->CastSpell((Unit*)nullptr, SPELL_EMPOWERING_SHADOWS, true);
+                    target->CastSpell(nullptr, SPELL_EMPOWERING_SHADOWS, true);
             }
 
             void Register() override
@@ -2600,7 +2600,7 @@ class spell_yogg_saron_death_ray_warning_visual : public SpellScriptLoader     /
                 if (Unit* caster = GetCaster())
                 {
                     caster->CastSpell(caster, SPELL_DEATH_RAY_PERIODIC, true);
-                    caster->CastSpell((Unit*)nullptr, SPELL_DEATH_RAY_DAMAGE_VISUAL, true);
+                    caster->CastSpell(nullptr, SPELL_DEATH_RAY_DAMAGE_VISUAL, true);
                     // TODO: set better movement
                     caster->GetMotionMaster()->MoveConfused();
                 }
@@ -2778,7 +2778,7 @@ class spell_yogg_saron_induce_madness : public SpellScriptLoader    // 64059
 
             void ClearShatteredIllusion()
             {
-                GetCaster()->CastSpell((Unit*)nullptr, SPELL_SHATTERED_ILLUSION_REMOVE);
+                GetCaster()->CastSpell(nullptr, SPELL_SHATTERED_ILLUSION_REMOVE);
 
                 if (InstanceScript* instance = GetCaster()->GetInstanceScript())
                     if (Creature* voice = instance->GetCreature(DATA_VOICE_OF_YOGG_SARON))
diff --git a/src/server/scripts/Northrend/UtgardeKeep/UtgardePinnacle/boss_skadi.cpp b/src/server/scripts/Northrend/UtgardeKeep/UtgardePinnacle/boss_skadi.cpp
index 968210df209..4fda1d7abf6 100644
--- a/src/server/scripts/Northrend/UtgardeKeep/UtgardePinnacle/boss_skadi.cpp
+++ b/src/server/scripts/Northrend/UtgardeKeep/UtgardePinnacle/boss_skadi.cpp
@@ -855,7 +855,7 @@ class spell_summon_gauntlet_mobs_periodic : public SpellScriptLoader
                 for (uint8 i = 0; i < 2; ++i)
                 {
                     uint32 spellId = SummonSpellsList.front();
-                    GetTarget()->CastSpell((Unit*)nullptr, spellId, true);
+                    GetTarget()->CastSpell(nullptr, spellId, true);
                     SummonSpellsList.push_back(spellId);
                     SummonSpellsList.pop_front();
                 }
diff --git a/src/server/scripts/Northrend/VaultOfArchavon/boss_archavon.cpp b/src/server/scripts/Northrend/VaultOfArchavon/boss_archavon.cpp
index 03ee2289818..ded80918b1c 100644
--- a/src/server/scripts/Northrend/VaultOfArchavon/boss_archavon.cpp
+++ b/src/server/scripts/Northrend/VaultOfArchavon/boss_archavon.cpp
@@ -243,12 +243,12 @@ class spell_archavon_rock_shards : public SpellScriptLoader
 
                 for (uint8 i = 0; i < 3; ++i)
                 {
-                    caster->CastSpell((Unit*)nullptr, SPELL_ROCK_SHARDS_VISUAL_L, true);
-                    caster->CastSpell((Unit*)nullptr, SPELL_ROCK_SHARDS_VISUAL_R, true);
+                    caster->CastSpell(nullptr, SPELL_ROCK_SHARDS_VISUAL_L, true);
+                    caster->CastSpell(nullptr, SPELL_ROCK_SHARDS_VISUAL_R, true);
                 }
 
-                caster->CastSpell((Unit*)nullptr, SPELL_ROCK_SHARDS_DAMAGE_L, true);
-                caster->CastSpell((Unit*)nullptr, SPELL_ROCK_SHARDS_DAMAGE_R, true);
+                caster->CastSpell(nullptr, SPELL_ROCK_SHARDS_DAMAGE_L, true);
+                caster->CastSpell(nullptr, SPELL_ROCK_SHARDS_DAMAGE_R, true);
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/zone_storm_peaks.cpp b/src/server/scripts/Northrend/zone_storm_peaks.cpp
index efe1691d479..76b2fa60fbd 100644
--- a/src/server/scripts/Northrend/zone_storm_peaks.cpp
+++ b/src/server/scripts/Northrend/zone_storm_peaks.cpp
@@ -1045,7 +1045,7 @@ class spell_close_rift : public SpellScriptLoader
             void HandlePeriodic(AuraEffect const* /* aurEff */)
             {
                 if (++_counter == 5)
-                    GetTarget()->CastSpell((Unit*)nullptr, SPELL_DESPAWN_RIFT, true);
+                    GetTarget()->CastSpell(nullptr, SPELL_DESPAWN_RIFT, true);
             }
 
             void Register() override
@@ -1241,7 +1241,7 @@ class spell_low_health_trigger : public SpellScriptLoader
 
             void HandleScript(SpellEffIndex /*effIndex*/)
             {
-                GetHitUnit()->CastSpell((Unit*)nullptr, GetEffectValue(), true);
+                GetHitUnit()->CastSpell(nullptr, GetEffectValue(), true);
             }
 
             void Register() override
@@ -1312,7 +1312,7 @@ class spell_claw_swipe_check : public SpellScriptLoader
                     }
                 }
 
-                GetTarget()->CastSpell((Unit*)nullptr, aurEff->GetAmount(), false);
+                GetTarget()->CastSpell(nullptr, aurEff->GetAmount(), false);
             }
 
             void Register() override
@@ -1355,7 +1355,7 @@ class spell_fatal_strike : public SpellScriptLoader
                     return;
                 }
 
-                GetCaster()->CastSpell((Unit*)nullptr, SPELL_FATAL_STRIKE_DAMAGE, true);
+                GetCaster()->CastSpell(nullptr, SPELL_FATAL_STRIKE_DAMAGE, true);
             }
 
             void Register() override
@@ -1422,7 +1422,7 @@ class spell_player_mount_wyrm : public SpellScriptLoader
 
             void HandleDummy(AuraEffect const* /*aurEff*/, AuraEffectHandleModes /*mode*/)
             {
-                GetTarget()->CastSpell((Unit*)nullptr, SPELL_FIGHT_WYRM, true);
+                GetTarget()->CastSpell(nullptr, SPELL_FIGHT_WYRM, true);
             }
 
             void Register() override