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!

52 files changed, 135 insertions, 133 deletions

diff --git a/src/server/game/AI/CoreAI/UnitAI.cpp b/src/server/game/AI/CoreAI/UnitAI.cpp
index 92c9c8e3fb6..244b0b5e047 100644
--- a/src/server/game/AI/CoreAI/UnitAI.cpp
+++ b/src/server/game/AI/CoreAI/UnitAI.cpp
@@ -190,7 +190,7 @@ void UnitAI::DoCastAOE(uint32 spellId, bool triggered)
     if (!triggered && me->HasUnitState(UNIT_STATE_CASTING))
         return;
 
-    me->CastSpell((Unit*)nullptr, spellId, triggered);
+    me->CastSpell(nullptr, spellId, triggered);
 }
 
 uint32 UnitAI::GetDialogStatus(Player* /*player*/)
diff --git a/src/server/game/Entities/Unit/Unit.h b/src/server/game/Entities/Unit/Unit.h
index 4fc9a43e464..de98312d51f 100644
--- a/src/server/game/Entities/Unit/Unit.h
+++ b/src/server/game/Entities/Unit/Unit.h
@@ -1279,7 +1279,9 @@ class TC_GAME_API Unit : public WorldObject
 
         void CastSpell(SpellCastTargets const& targets, SpellInfo const* spellInfo, CustomSpellValues const* value, TriggerCastFlags triggerFlags = TRIGGERED_NONE, Item* castItem = nullptr, AuraEffect const* triggeredByAura = nullptr, ObjectGuid originalCaster = ObjectGuid::Empty);
         void CastSpell(Unit* victim, uint32 spellId, bool triggered, Item* castItem = nullptr, AuraEffect const* triggeredByAura = nullptr, ObjectGuid originalCaster = ObjectGuid::Empty);
+        void CastSpell(std::nullptr_t ptr, uint32 spellId, bool triggered, Item* castItem = nullptr, AuraEffect* triggeredByAura = nullptr, ObjectGuid originalCaster = ObjectGuid::Empty) { CastSpell((Unit*)nullptr, spellId, triggered, castItem, triggeredByAura, originalCaster); }
         void CastSpell(Unit* victim, uint32 spellId, TriggerCastFlags triggerFlags = TRIGGERED_NONE, Item* castItem = nullptr, AuraEffect const* triggeredByAura = nullptr, ObjectGuid originalCaster = ObjectGuid::Empty);
+        void CastSpell(std::nullptr_t ptr, uint32 spellId, TriggerCastFlags triggerFlags = TRIGGERED_NONE, Item* castItem = nullptr, AuraEffect* triggeredByAura = nullptr, ObjectGuid originalCaster = ObjectGuid::Empty) { CastSpell((Unit*)nullptr, spellId, triggerFlags, castItem, triggeredByAura, originalCaster); }
         void CastSpell(Unit* victim, SpellInfo const* spellInfo, bool triggered, Item* castItem = nullptr, AuraEffect const* triggeredByAura = nullptr, ObjectGuid originalCaster = ObjectGuid::Empty);
         void CastSpell(Unit* victim, SpellInfo const* spellInfo, TriggerCastFlags triggerFlags = TRIGGERED_NONE, Item* castItem = nullptr, AuraEffect const* triggeredByAura = nullptr, ObjectGuid originalCaster = ObjectGuid::Empty);
         void CastSpell(float x, float y, float z, uint32 spellId, bool triggered, Item* castItem = nullptr, AuraEffect const* triggeredByAura = nullptr, ObjectGuid originalCaster = ObjectGuid::Empty);
diff --git a/src/server/game/Spells/Auras/SpellAuraEffects.cpp b/src/server/game/Spells/Auras/SpellAuraEffects.cpp
index 2d57d1472b4..80565e1b464 100644
--- a/src/server/game/Spells/Auras/SpellAuraEffects.cpp
+++ b/src/server/game/Spells/Auras/SpellAuraEffects.cpp
@@ -4563,7 +4563,7 @@ void AuraEffect::HandleAuraDummy(AuraApplication const* aurApp, uint8 mode, bool
                             break;
                         case 52172:  // Coyote Spirit Despawn Aura
                         case 60244:  // Blood Parrot Despawn Aura
-                            target->CastSpell((Unit*)nullptr, GetAmount(), true, nullptr, this);
+                            target->CastSpell(nullptr, GetAmount(), true, nullptr, this);
                             break;
                         case 58600: // Restricted Flight Area
                         case 58730: // Restricted Flight Area
@@ -5121,7 +5121,7 @@ void AuraEffect::HandlePeriodicDummyAuraTick(Unit* target, Unit* caster) const
                 }
                 case 62292: // Blaze (Pool of Tar)
                     // should we use custom damage?
-                    target->CastSpell((Unit*)nullptr, m_spellInfo->Effects[m_effIndex].TriggerSpell, true);
+                    target->CastSpell(nullptr, m_spellInfo->Effects[m_effIndex].TriggerSpell, true);
                     break;
                 case 62399: // Overload Circuit
                     if (target->GetMap()->IsDungeon() && int(target->GetAppliedAuras().count(62399)) >= (target->GetMap()->IsHeroic() ? 4 : 2))
@@ -5145,7 +5145,7 @@ void AuraEffect::HandlePeriodicDummyAuraTick(Unit* target, Unit* caster) const
             // Mirror Image
             if (GetId() == 55342)
                 // Set name of summons to name of caster
-                target->CastSpell((Unit*)nullptr, m_spellInfo->Effects[m_effIndex].TriggerSpell, true);
+                target->CastSpell(nullptr, m_spellInfo->Effects[m_effIndex].TriggerSpell, true);
             break;
         }
         case SPELLFAMILY_DRUID:
diff --git a/src/server/game/Spells/SpellEffects.cpp b/src/server/game/Spells/SpellEffects.cpp
index 852e34a059f..42fe5d29600 100644
--- a/src/server/game/Spells/SpellEffects.cpp
+++ b/src/server/game/Spells/SpellEffects.cpp
@@ -1008,7 +1008,7 @@ void Spell::EffectTriggerRitualOfSummoning(SpellEffIndex effIndex)
 
     finish();
 
-    m_caster->CastSpell((Unit*)nullptr, spellInfo, false);
+    m_caster->CastSpell(nullptr, spellInfo, false);
 }
 
 void Spell::EffectJump(SpellEffIndex effIndex)
diff --git a/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockDepths/boss_coren_direbrew.cpp b/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockDepths/boss_coren_direbrew.cpp
index b854239c303..fb12a651317 100644
--- a/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockDepths/boss_coren_direbrew.cpp
+++ b/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockDepths/boss_coren_direbrew.cpp
@@ -436,7 +436,7 @@ public:
                 .Schedule(Seconds(1), [this](TaskContext /*context*/)
                 {
                     me->UseDoorOrButton(8);
-                    me->CastSpell((Unit*)nullptr, SPELL_MOLE_MACHINE_EMERGE, true);
+                    me->CastSpell(nullptr, SPELL_MOLE_MACHINE_EMERGE, true);
                 })
                 .Schedule(Seconds(4), [this](TaskContext /*context*/)
                 {
@@ -667,7 +667,7 @@ class spell_barreled_control_aura : public SpellScriptLoader
             void PeriodicTick(AuraEffect const* /*aurEff*/)
             {
                 PreventDefaultAction();
-                GetTarget()->CastSpell((Unit*)nullptr, SPELL_BARRELED, true);
+                GetTarget()->CastSpell(nullptr, SPELL_BARRELED, true);
             }
 
             void Register() override
diff --git a/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_nefarian.cpp b/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_nefarian.cpp
index 076966a2acb..105b27e711e 100644
--- a/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_nefarian.cpp
+++ b/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/boss_nefarian.cpp
@@ -355,7 +355,7 @@ public:
                                         nefarian->setActive(true);
                                         nefarian->SetCanFly(true);
                                         nefarian->SetDisableGravity(true);
-                                        nefarian->CastSpell((Unit*)nullptr, SPELL_SHADOWFLAME_INITIAL);
+                                        nefarian->CastSpell(nullptr, SPELL_SHADOWFLAME_INITIAL);
                                         nefarian->GetMotionMaster()->MovePoint(1, NefarianLoc[1]);
                                     }
                                     events.CancelEvent(EVENT_MIND_CONTROL);
diff --git a/src/server/scripts/EasternKingdoms/ScarletEnclave/chapter1.cpp b/src/server/scripts/EasternKingdoms/ScarletEnclave/chapter1.cpp
index aa3b894bbe3..f15b4613cb0 100644
--- a/src/server/scripts/EasternKingdoms/ScarletEnclave/chapter1.cpp
+++ b/src/server/scripts/EasternKingdoms/ScarletEnclave/chapter1.cpp
@@ -1071,7 +1071,7 @@ class npc_scarlet_miner_cart : public CreatureScript
                 if (apply)
                 {
                     _playerGUID = who->GetGUID();
-                    me->CastSpell((Unit*)nullptr, SPELL_SUMMON_MINER, true);
+                    me->CastSpell(nullptr, SPELL_SUMMON_MINER, true);
                 }
                 else
                 {
diff --git a/src/server/scripts/EasternKingdoms/ShadowfangKeep/shadowfang_keep.cpp b/src/server/scripts/EasternKingdoms/ShadowfangKeep/shadowfang_keep.cpp
index 86ef68e8c4a..f6a5009d112 100644
--- a/src/server/scripts/EasternKingdoms/ShadowfangKeep/shadowfang_keep.cpp
+++ b/src/server/scripts/EasternKingdoms/ShadowfangKeep/shadowfang_keep.cpp
@@ -333,7 +333,7 @@ class spell_shadowfang_keep_haunting_spirits : public SpellScriptLoader
 
             void HandleDummyTick(AuraEffect const* aurEff)
             {
-                GetTarget()->CastSpell((Unit*)nullptr, aurEff->GetAmount(), true);
+                GetTarget()->CastSpell(nullptr, aurEff->GetAmount(), true);
             }
 
             void HandleUpdatePeriodic(AuraEffect* aurEff)
diff --git a/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp b/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp
index f0bcb9dd3de..ae9725525a1 100644
--- a/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp
+++ b/src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp
@@ -124,7 +124,7 @@ class VoidSpawnSummon : public BasicEvent
 
         bool Execute(uint64 /*time*/, uint32 /*diff*/)
         {
-            _owner->CastSpell((Unit*)nullptr, SPELL_SUMMON_VOID_SENTINEL, true);
+            _owner->CastSpell(nullptr, SPELL_SUMMON_VOID_SENTINEL, true);
             return true;
         }
 
@@ -589,7 +589,7 @@ class spell_summon_blood_elves_script : SpellScriptLoader
             void HandleScript(SpellEffIndex /*effIndex*/)
             {
                 for (uint8 i = 0; i < MAX_SUMMON_BLOOD_ELVES; ++i)
-                    GetCaster()->CastSpell((Unit*)nullptr, SummonBloodElvesSpells[urand(0,3)], true);
+                    GetCaster()->CastSpell(nullptr, SummonBloodElvesSpells[urand(0,3)], true);
             }
 
             void Register() override
@@ -621,7 +621,7 @@ class spell_muru_darkness : SpellScriptLoader
             void HandleAfterCast()
             {
                 for (uint8 i = 0; i < MAX_SUMMON_DARK_FIEND; ++i)
-                    GetCaster()->CastSpell((Unit*)nullptr, SummonDarkFiendSpells[i], true);
+                    GetCaster()->CastSpell(nullptr, SummonDarkFiendSpells[i], true);
             }
 
             void Register() override
@@ -683,7 +683,7 @@ class spell_transform_visual_missile_periodic : public SpellScriptLoader
 
             void OnPeriodic(AuraEffect const* /*aurEff*/)
             {
-                GetTarget()->CastSpell((Unit*)nullptr, RAND(TRANSFORM_VISUAL_MISSILE_1, TRANSFORM_VISUAL_MISSILE_2), true);
+                GetTarget()->CastSpell(nullptr, RAND(TRANSFORM_VISUAL_MISSILE_1, TRANSFORM_VISUAL_MISSILE_2), true);
             }
 
             void Register() override
@@ -709,7 +709,7 @@ class spell_summon_blood_elves_periodic : public SpellScriptLoader
 
             void OnPeriodic(AuraEffect const* /*aurEff*/)
             {
-                GetTarget()->CastSpell((Unit*)nullptr, SPELL_SUMMON_BLOOD_ELVES_SCRIPT, true);
+                GetTarget()->CastSpell(nullptr, SPELL_SUMMON_BLOOD_ELVES_SCRIPT, true);
             }
 
             void Register() override
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
diff --git a/src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_blackheart_the_inciter.cpp b/src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_blackheart_the_inciter.cpp
index 2dd469c0068..7f9111cfffb 100644
--- a/src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_blackheart_the_inciter.cpp
+++ b/src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_blackheart_the_inciter.cpp
@@ -229,7 +229,7 @@ class spell_blackheart_incite_chaos : public SpellScript
     {
         if (Unit* target = GetHitUnit())
         {
-            target->CastSpell((Unit*)nullptr, INCITE_SPELLS[i], true);
+            target->CastSpell(nullptr, INCITE_SPELLS[i], true);
             i = (i + 1) % NUM_INCITE_SPELLS;
         }
     }
diff --git a/src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_murmur.cpp b/src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_murmur.cpp
index edaab7cd9cb..1d415bed072 100644
--- a/src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_murmur.cpp
+++ b/src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_murmur.cpp
@@ -185,7 +185,7 @@ class spell_murmur_sonic_boom : public SpellScriptLoader
 
             void HandleEffect(SpellEffIndex /*effIndex*/)
             {
-                GetCaster()->CastSpell((Unit*)nullptr, SPELL_SONIC_BOOM_EFFECT, true);
+                GetCaster()->CastSpell(nullptr, SPELL_SONIC_BOOM_EFFECT, true);
             }
 
             void Register() override
diff --git a/src/server/scripts/Outland/BlackTemple/black_temple.cpp b/src/server/scripts/Outland/BlackTemple/black_temple.cpp
index 08b00caa519..e43c26ec319 100644
--- a/src/server/scripts/Outland/BlackTemple/black_temple.cpp
+++ b/src/server/scripts/Outland/BlackTemple/black_temple.cpp
@@ -138,11 +138,11 @@ public:
                         {
                             for (ObjectGuid guid : _bloodmageList)
                                 if (Creature* bloodmage = ObjectAccessor::GetCreature(*me, guid))
-                                    bloodmage->CastSpell((Unit*)nullptr, SPELL_SUMMON_CHANNEL);
+                                    bloodmage->CastSpell(nullptr, SPELL_SUMMON_CHANNEL);
 
                             for (ObjectGuid guid : _deathshaperList)
                                 if (Creature* deathshaper = ObjectAccessor::GetCreature(*me, guid))
-                                    deathshaper->CastSpell((Unit*)nullptr, SPELL_SUMMON_CHANNEL);
+                                    deathshaper->CastSpell(nullptr, SPELL_SUMMON_CHANNEL);
 
                             _events.ScheduleEvent(EVENT_SET_CHANNELERS, 12000);
 
diff --git a/src/server/scripts/Outland/GruulsLair/boss_gruul.cpp b/src/server/scripts/Outland/GruulsLair/boss_gruul.cpp
index f6ad97f6328..ac6c9e62072 100644
--- a/src/server/scripts/Outland/GruulsLair/boss_gruul.cpp
+++ b/src/server/scripts/Outland/GruulsLair/boss_gruul.cpp
@@ -285,7 +285,7 @@ class spell_gruul_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/Outland/HellfireCitadel/MagtheridonsLair/boss_magtheridon.cpp b/src/server/scripts/Outland/HellfireCitadel/MagtheridonsLair/boss_magtheridon.cpp
index 354e4b0fce3..f0cf459acfe 100644
--- a/src/server/scripts/Outland/HellfireCitadel/MagtheridonsLair/boss_magtheridon.cpp
+++ b/src/server/scripts/Outland/HellfireCitadel/MagtheridonsLair/boss_magtheridon.cpp
@@ -477,9 +477,9 @@ public:
                 return true;
 
             if (Creature* trigger = player->FindNearestCreature(NPC_HELFIRE_RAID_TRIGGER, 10.0f))
-                trigger->CastSpell((Unit*)nullptr, SPELL_SHADOW_GRASP_VISUAL);
+                trigger->CastSpell(nullptr, SPELL_SHADOW_GRASP_VISUAL);
 
-            player->CastSpell((Unit*)nullptr, SPELL_SHADOW_GRASP, true);
+            player->CastSpell(nullptr, SPELL_SHADOW_GRASP, true);
             return true;
         }
     };
diff --git a/src/server/scripts/Pet/pet_hunter.cpp b/src/server/scripts/Pet/pet_hunter.cpp
index 20dcf5fb5d7..ed5f9ea48ed 100644
--- a/src/server/scripts/Pet/pet_hunter.cpp
+++ b/src/server/scripts/Pet/pet_hunter.cpp
@@ -236,7 +236,7 @@ class spell_pet_guard_dog : public SpellScriptLoader
                 PreventDefaultAction();
 
                 Unit* caster = eventInfo.GetActor();
-                caster->CastSpell((Unit*)nullptr, SPELL_PET_GUARD_DOG_HAPPINESS, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, SPELL_PET_GUARD_DOG_HAPPINESS, true, nullptr, aurEff);
 
                 float addThreat = CalculatePct(ASSERT_NOTNULL(eventInfo.GetSpellInfo())->Effects[EFFECT_0].CalcValue(caster), aurEff->GetAmount());
                 eventInfo.GetProcTarget()->GetThreatManager().AddThreat(caster, addThreat, GetSpellInfo(), false, true);
@@ -288,7 +288,7 @@ class spell_pet_silverback : public SpellScriptLoader
                 PreventDefaultAction();
 
                 uint32 spellId = triggerSpell[GetSpellInfo()->GetRank() - 1];
-                eventInfo.GetActor()->CastSpell((Unit*)nullptr, spellId, true, nullptr, aurEff);
+                eventInfo.GetActor()->CastSpell(nullptr, spellId, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_dk.cpp b/src/server/scripts/Spells/spell_dk.cpp
index bd2e36bc30f..1cbe0537563 100644
--- a/src/server/scripts/Spells/spell_dk.cpp
+++ b/src/server/scripts/Spells/spell_dk.cpp
@@ -1546,7 +1546,7 @@ class spell_dk_pvp_4p_bonus : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                eventInfo.GetActionTarget()->CastSpell((Unit*)nullptr, SPELL_DK_RUNIC_RETURN, true, nullptr, aurEff);
+                eventInfo.GetActionTarget()->CastSpell(nullptr, SPELL_DK_RUNIC_RETURN, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_druid.cpp b/src/server/scripts/Spells/spell_druid.cpp
index d57bd1e3008..0a4b7ae303e 100644
--- a/src/server/scripts/Spells/spell_druid.cpp
+++ b/src/server/scripts/Spells/spell_druid.cpp
@@ -495,7 +495,7 @@ class spell_dru_glyph_of_barkskin : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_DRUID_BARKSKIN_01, true, nullptr, aurEff);
+                eventInfo.GetActor()->CastSpell(nullptr, SPELL_DRUID_BARKSKIN_01, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -1160,7 +1160,7 @@ class spell_dru_omen_of_clarity : public SpellScriptLoader
             {
                 Unit* target = GetTarget();
                 if (target->HasAura(SPELL_DRUID_BALANCE_T10_BONUS))
-                    target->CastSpell((Unit*)nullptr, SPELL_DRUID_BALANCE_T10_BONUS_PROC, true, nullptr, aurEff);
+                    target->CastSpell(nullptr, SPELL_DRUID_BALANCE_T10_BONUS_PROC, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -1874,7 +1874,7 @@ class spell_dru_t4_2p_bonus : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_DRUID_INFUSION, true, nullptr, aurEff);
+                eventInfo.GetActor()->CastSpell(nullptr, SPELL_DRUID_INFUSION, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -1940,7 +1940,7 @@ class spell_dru_item_t6_trinket : public SpellScriptLoader
                     return;
 
                 if (roll_chance_i(chance))
-                    eventInfo.GetActor()->CastSpell((Unit*)nullptr, spellId, true, nullptr, aurEff);
+                    eventInfo.GetActor()->CastSpell(nullptr, spellId, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_generic.cpp b/src/server/scripts/Spells/spell_generic.cpp
index 42ab94f193e..1b06b8c3a4a 100644
--- a/src/server/scripts/Spells/spell_generic.cpp
+++ b/src/server/scripts/Spells/spell_generic.cpp
@@ -1855,7 +1855,7 @@ class spell_gen_moss_covered_feet : public AuraScript
     void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
     {
         PreventDefaultAction();
-        eventInfo.GetActionTarget()->CastSpell((Unit*)nullptr, SPELL_FALL_DOWN, true, nullptr, aurEff);
+        eventInfo.GetActionTarget()->CastSpell(nullptr, SPELL_FALL_DOWN, true, nullptr, aurEff);
     }
 
     void Register() override
@@ -2116,7 +2116,7 @@ class spell_gen_paralytic_poison : public AuraScript
         if (GetTargetApplication()->GetRemoveMode() != AURA_REMOVE_BY_EXPIRE)
             return;
 
-        GetTarget()->CastSpell((Unit*)nullptr, SPELL_PARALYSIS, true, nullptr, aurEff);
+        GetTarget()->CastSpell(nullptr, SPELL_PARALYSIS, true, nullptr, aurEff);
     }
 
     void Register() override
@@ -2705,7 +2705,7 @@ class spell_pvp_trinket_wotf_shared_cd : public SpellScriptLoader
                 */
 
                 // Spell flags need further research, until then just cast not triggered
-                GetCaster()->CastSpell((Unit*)nullptr, Triggered, false);
+                GetCaster()->CastSpell(nullptr, Triggered, false);
             }
 
             void Register() override
@@ -2933,7 +2933,7 @@ class spell_gen_whisper_gulch_yogg_saron_whisper : public AuraScript
     void HandleEffectPeriodic(AuraEffect const* /*aurEff*/)
     {
         PreventDefaultAction();
-        GetTarget()->CastSpell((Unit*)nullptr, SPELL_YOGG_SARON_WHISPER_DUMMY, true);
+        GetTarget()->CastSpell(nullptr, SPELL_YOGG_SARON_WHISPER_DUMMY, true);
     }
 
     void Register() override
diff --git a/src/server/scripts/Spells/spell_holiday.cpp b/src/server/scripts/Spells/spell_holiday.cpp
index eac0ff10c23..b278cec06bd 100644
--- a/src/server/scripts/Spells/spell_holiday.cpp
+++ b/src/server/scripts/Spells/spell_holiday.cpp
@@ -1318,7 +1318,7 @@ class spell_brewfest_relay_race_intro_force_player_to_throw : public SpellScript
                 PreventHitDefaultEffect(effIndex);
                 // All this spells trigger a spell that requires reagents; if the
                 // triggered spell is cast as "triggered", reagents are not consumed
-                GetHitUnit()->CastSpell((Unit*)nullptr, GetSpellInfo()->Effects[effIndex].TriggerSpell, TriggerCastFlags(TRIGGERED_FULL_MASK & ~TRIGGERED_IGNORE_POWER_AND_REAGENT_COST));
+                GetHitUnit()->CastSpell(nullptr, GetSpellInfo()->Effects[effIndex].TriggerSpell, TriggerCastFlags(TRIGGERED_FULL_MASK & ~TRIGGERED_IGNORE_POWER_AND_REAGENT_COST));
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_hunter.cpp b/src/server/scripts/Spells/spell_hunter.cpp
index 2b9bfac79e9..a7fed99dccf 100644
--- a/src/server/scripts/Spells/spell_hunter.cpp
+++ b/src/server/scripts/Spells/spell_hunter.cpp
@@ -443,7 +443,7 @@ class spell_hun_glyph_of_mend_pet : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                eventInfo.GetProcTarget()->CastSpell((Unit*)nullptr, SPELL_HUNTER_GLYPH_OF_MEND_PET_HAPPINESS, true, nullptr, aurEff);
+                eventInfo.GetProcTarget()->CastSpell(nullptr, SPELL_HUNTER_GLYPH_OF_MEND_PET_HAPPINESS, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -476,7 +476,7 @@ class spell_hun_hunting_party : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_REPLENISHMENT, true, nullptr, aurEff);
+                eventInfo.GetActor()->CastSpell(nullptr, SPELL_REPLENISHMENT, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -775,7 +775,7 @@ class spell_hun_masters_call : public SpellScriptLoader
 
             void HandleScriptEffect(SpellEffIndex /*effIndex*/)
             {
-                GetHitUnit()->CastSpell((Unit*)nullptr, SPELL_HUNTER_MASTERS_CALL_TRIGGERED, true);
+                GetHitUnit()->CastSpell(nullptr, SPELL_HUNTER_MASTERS_CALL_TRIGGERED, true);
             }
 
             void Register() override
@@ -1105,7 +1105,7 @@ class spell_hun_rapid_recuperation_trigger : public SpellScriptLoader
 
                 uint8 rank = GetSpellInfo()->GetRank();
                 uint32 spellId = triggerSpells[rank - 1];
-                eventInfo.GetActor()->CastSpell((Unit*)nullptr, spellId, true, nullptr, aurEff);
+                eventInfo.GetActor()->CastSpell(nullptr, spellId, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_item.cpp b/src/server/scripts/Spells/spell_item.cpp
index 367fc7f25d3..e78bd3804be 100644
--- a/src/server/scripts/Spells/spell_item.cpp
+++ b/src/server/scripts/Spells/spell_item.cpp
@@ -208,7 +208,7 @@ class spell_item_anger_capacitor : public SpellScriptLoader
                 Unit* caster = eventInfo.GetActor();
                 Unit* target = eventInfo.GetProcTarget();
 
-                caster->CastSpell((Unit*)nullptr, SPELL_MOTE_OF_ANGER, true);
+                caster->CastSpell(nullptr, SPELL_MOTE_OF_ANGER, true);
                 Aura const* motes = caster->GetAura(SPELL_MOTE_OF_ANGER);
                 if (!motes || motes->GetStackAmount() < Stacks)
                     return;
@@ -727,7 +727,7 @@ class spell_item_discerning_eye_beast_dummy : public AuraScript
     void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
     {
         PreventDefaultAction();
-        eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_DISCERNING_EYE_BEAST, true, nullptr, aurEff);
+        eventInfo.GetActor()->CastSpell(nullptr, SPELL_DISCERNING_EYE_BEAST, true, nullptr, aurEff);
     }
 
     void Register() override
@@ -930,7 +930,7 @@ class spell_item_harm_prevention_belt : public AuraScript
 
     void HandleProc(ProcEventInfo& /*eventInfo*/)
     {
-        GetTarget()->CastSpell((Unit*)nullptr, SPELL_FORCEFIELD_COLLAPSE, true);
+        GetTarget()->CastSpell(nullptr, SPELL_FORCEFIELD_COLLAPSE, true);
     }
 
     void Register() override
@@ -958,7 +958,7 @@ class spell_item_healing_touch_refund : public AuraScript
     void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
     {
         PreventDefaultAction();
-        eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_HEALING_TOUCH_MANA, true, nullptr, aurEff);
+        eventInfo.GetActor()->CastSpell(nullptr, SPELL_HEALING_TOUCH_MANA, true, nullptr, aurEff);
     }
 
     void Register() override
@@ -1032,7 +1032,7 @@ class spell_item_heartpierce : public SpellScriptLoader
                         return;
                 }
 
-                caster->CastSpell((Unit*)nullptr, spellId, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, spellId, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -1145,7 +1145,7 @@ class spell_item_mark_of_conquest : public AuraScript
             // in that case, do not cast heal spell
             PreventDefaultAction();
             // but mana instead
-            eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_MARK_OF_CONQUEST_ENERGIZE, true, nullptr, aurEff);
+            eventInfo.GetActor()->CastSpell(nullptr, SPELL_MARK_OF_CONQUEST_ENERGIZE, true, nullptr, aurEff);
         }
     }
 
@@ -1825,7 +1825,7 @@ class spell_item_totem_of_flowing_water : public AuraScript
     void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
     {
         PreventDefaultAction();
-        eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_LESSER_HEALING_WAVE_MANA, true, nullptr, aurEff);
+        eventInfo.GetActor()->CastSpell(nullptr, SPELL_LESSER_HEALING_WAVE_MANA, true, nullptr, aurEff);
     }
 
     void Register() override
diff --git a/src/server/scripts/Spells/spell_mage.cpp b/src/server/scripts/Spells/spell_mage.cpp
index 440c0ba4c5e..6cf70c3a6de 100644
--- a/src/server/scripts/Spells/spell_mage.cpp
+++ b/src/server/scripts/Spells/spell_mage.cpp
@@ -357,7 +357,7 @@ class spell_mage_combustion : public SpellScriptLoader
                 // Do not take charges, add a stack of crit buff
                 if (!(eventInfo.GetHitMask() & PROC_HIT_CRITICAL))
                 {
-                    eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_MAGE_COMBUSTION_PROC, true);
+                    eventInfo.GetActor()->CastSpell(nullptr, SPELL_MAGE_COMBUSTION_PROC, true);
                     return false;
                 }
 
@@ -461,7 +461,7 @@ class spell_mage_imp_mana_gems : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_MAGE_MANA_SURGE, true, nullptr, aurEff);
+                eventInfo.GetActor()->CastSpell(nullptr, SPELL_MAGE_MANA_SURGE, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -712,7 +712,7 @@ class spell_mage_gen_extra_effects : public SpellScriptLoader
                 Unit* caster = eventInfo.GetActor();
 
                 if (caster->HasAura(SPELL_MAGE_T10_2P_BONUS))
-                    caster->CastSpell((Unit*)nullptr, SPELL_MAGE_T10_2P_BONUS_EFFECT, true);
+                    caster->CastSpell(nullptr, SPELL_MAGE_T10_2P_BONUS_EFFECT, true);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_paladin.cpp b/src/server/scripts/Spells/spell_paladin.cpp
index 08ea6472a8d..3e371586175 100644
--- a/src/server/scripts/Spells/spell_paladin.cpp
+++ b/src/server/scripts/Spells/spell_paladin.cpp
@@ -1631,8 +1631,8 @@ class spell_pal_judgements_of_the_wise : public SpellScriptLoader
                 PreventDefaultAction();
 
                 Unit* caster = eventInfo.GetActor();
-                caster->CastSpell((Unit*)nullptr, SPELL_PALADIN_JUDGEMENTS_OF_THE_WISE_MANA, true, nullptr, aurEff);
-                caster->CastSpell((Unit*)nullptr, SPELL_REPLENISHMENT, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, SPELL_PALADIN_JUDGEMENTS_OF_THE_WISE_MANA, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, SPELL_REPLENISHMENT, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_priest.cpp b/src/server/scripts/Spells/spell_priest.cpp
index 4ba231b021c..74c728a6cb0 100644
--- a/src/server/scripts/Spells/spell_priest.cpp
+++ b/src/server/scripts/Spells/spell_priest.cpp
@@ -648,10 +648,10 @@ class spell_pri_item_t6_trinket : public SpellScriptLoader
                 PreventDefaultAction();
                 Unit* caster = eventInfo.GetActor();
                 if (eventInfo.GetSpellTypeMask() & PROC_SPELL_TYPE_HEAL)
-                    caster->CastSpell((Unit*)nullptr, SPELL_PRIEST_DIVINE_BLESSING, true, nullptr, aurEff);
+                    caster->CastSpell(nullptr, SPELL_PRIEST_DIVINE_BLESSING, true, nullptr, aurEff);
 
                 if (eventInfo.GetSpellTypeMask() & PROC_SPELL_TYPE_DAMAGE)
-                    caster->CastSpell((Unit*)nullptr, SPELL_PRIEST_DIVINE_WRATH, true, nullptr, aurEff);
+                    caster->CastSpell(nullptr, SPELL_PRIEST_DIVINE_WRATH, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -1287,7 +1287,7 @@ class spell_pri_vampiric_touch : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                eventInfo.GetActor()->CastSpell((Unit*)nullptr, SPELL_REPLENISHMENT, true, nullptr, aurEff);
+                eventInfo.GetActor()->CastSpell(nullptr, SPELL_REPLENISHMENT, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_quest.cpp b/src/server/scripts/Spells/spell_quest.cpp
index e3ef1faee6f..7cc32340665 100644
--- a/src/server/scripts/Spells/spell_quest.cpp
+++ b/src/server/scripts/Spells/spell_quest.cpp
@@ -2149,7 +2149,7 @@ class spell_q12641_death_comes_from_on_high : public SpellScriptLoader
                         return;
                 }
 
-                GetCaster()->CastSpell((Unit*)nullptr, spellId, true);
+                GetCaster()->CastSpell(nullptr, spellId, true);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_rogue.cpp b/src/server/scripts/Spells/spell_rogue.cpp
index 750b5073a7c..0476c4c09df 100644
--- a/src/server/scripts/Spells/spell_rogue.cpp
+++ b/src/server/scripts/Spells/spell_rogue.cpp
@@ -1022,7 +1022,7 @@ public:
                 return;
 
             if (Player* player = caster->ToPlayer())
-                player->CastSpell((Unit*)nullptr, SPELL_ROGUE_HONOR_AMONG_THIEVES_2, true);
+                player->CastSpell(nullptr, SPELL_ROGUE_HONOR_AMONG_THIEVES_2, true);
         }
 
         void Register() override
@@ -1060,7 +1060,7 @@ class spell_rog_turn_the_tables : public SpellScriptLoader
                 if (!caster)
                     return;
 
-                caster->CastSpell((Unit*)nullptr, GetSpellInfo()->Effects[EFFECT_0].TriggerSpell, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, GetSpellInfo()->Effects[EFFECT_0].TriggerSpell, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_shaman.cpp b/src/server/scripts/Spells/spell_shaman.cpp
index 72208d73653..ecde34a4b8e 100644
--- a/src/server/scripts/Spells/spell_shaman.cpp
+++ b/src/server/scripts/Spells/spell_shaman.cpp
@@ -455,7 +455,7 @@ class spell_sha_earthbind_totem : public SpellScriptLoader
                 if (Player* owner = GetCaster()->GetCharmerOrOwnerPlayerOrPlayerItself())
                     if (AuraEffect* aur = owner->GetDummyAuraEffect(SPELLFAMILY_SHAMAN, 2289, 0))
                         if (roll_chance_i(aur->GetBaseAmount()))
-                            GetTarget()->CastSpell((Unit*)nullptr, SPELL_SHAMAN_TOTEM_EARTHEN_POWER, true);
+                            GetTarget()->CastSpell(nullptr, SPELL_SHAMAN_TOTEM_EARTHEN_POWER, true);
             }
 
             void Apply(AuraEffect const* /*aurEff*/, AuraEffectHandleModes /*mode*/)
@@ -1075,7 +1075,7 @@ class spell_sha_imp_water_shield : public SpellScriptLoader
                     return;
 
                 uint32 spellId = waterShield->GetSpellInfo()->Effects[waterShield->GetEffIndex()].TriggerSpell;
-                caster->CastSpell((Unit*)nullptr, spellId, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, spellId, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -1308,7 +1308,7 @@ class spell_sha_item_t6_trinket : public SpellScriptLoader
                     return;
 
                 if (roll_chance_i(chance))
-                    eventInfo.GetActor()->CastSpell((Unit*)nullptr, spellId, true, nullptr, aurEff);
+                    eventInfo.GetActor()->CastSpell(nullptr, spellId, true, nullptr, aurEff);
             }
 
             void Register() override
@@ -1474,7 +1474,7 @@ class spell_sha_maelstrom_weapon : public SpellScriptLoader
                 if (!aurEff || !roll_chance_i(aurEff->GetAmount()))
                     return;
 
-                caster->CastSpell((Unit*)nullptr, SPELL_SHAMAN_MAELSTROM_POWER, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, SPELL_SHAMAN_MAELSTROM_POWER, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_warlock.cpp b/src/server/scripts/Spells/spell_warlock.cpp
index 4ff38244435..3ee5f8f4e7c 100644
--- a/src/server/scripts/Spells/spell_warlock.cpp
+++ b/src/server/scripts/Spells/spell_warlock.cpp
@@ -1334,11 +1334,11 @@ class spell_warl_soul_leech : public SpellScriptLoader
                 uint32 selfSpellId = casterMana[impSoulLeechRank - 1];
                 uint32 petSpellId = petMana[impSoulLeechRank - 1];
 
-                caster->CastSpell((Unit*)nullptr, selfSpellId, true, nullptr, aurEff);
-                caster->CastSpell((Unit*)nullptr, petSpellId, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, selfSpellId, true, nullptr, aurEff);
+                caster->CastSpell(nullptr, petSpellId, true, nullptr, aurEff);
 
                 if (roll_chance_i(impSoulLeech->GetAmount()))
-                    caster->CastSpell((Unit*)nullptr, SPELL_REPLENISHMENT, true, nullptr, aurEff);
+                    caster->CastSpell(nullptr, SPELL_REPLENISHMENT, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Spells/spell_warrior.cpp b/src/server/scripts/Spells/spell_warrior.cpp
index 4c859f5c8bc..3d6791a0391 100644
--- a/src/server/scripts/Spells/spell_warrior.cpp
+++ b/src/server/scripts/Spells/spell_warrior.cpp
@@ -444,13 +444,13 @@ class spell_warr_extra_proc : public SpellScriptLoader
                 if (!roll_chance_i(bonusAurEff->GetAmount()))
                     return;
 
-                target->CastSpell((Unit*)nullptr, SPELL_WARRIOR_EXTRA_CHARGE, true, nullptr, aurEff);
+                target->CastSpell(nullptr, SPELL_WARRIOR_EXTRA_CHARGE, true, nullptr, aurEff);
 
                 SpellInfo const* auraInfo = aurEff->GetSpellInfo();
                 if (auraInfo->IsRankOf(sSpellMgr->AssertSpellInfo(SPELL_WARRIOR_BLOODSURGE_R1)))
-                    target->CastSpell((Unit*)nullptr, SPELL_WARRIOR_SLAM_GCD_REDUCED, true, nullptr, aurEff);
+                    target->CastSpell(nullptr, SPELL_WARRIOR_SLAM_GCD_REDUCED, true, nullptr, aurEff);
                 else if (auraInfo->IsRankOf(sSpellMgr->AssertSpellInfo(SPELL_WARRIOR_SUDDEN_DEATH_R1)))
-                    target->CastSpell((Unit*)nullptr, SPELL_WARRIOR_EXECUTE_GCD_REDUCED, true, nullptr, aurEff);
+                    target->CastSpell(nullptr, SPELL_WARRIOR_EXECUTE_GCD_REDUCED, true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/World/boss_emerald_dragons.cpp b/src/server/scripts/World/boss_emerald_dragons.cpp
index f510b5c6839..96daefc124c 100644
--- a/src/server/scripts/World/boss_emerald_dragons.cpp
+++ b/src/server/scripts/World/boss_emerald_dragons.cpp
@@ -398,7 +398,7 @@ class boss_lethon : public CreatureScript
                 switch (eventId)
                 {
                     case EVENT_SHADOW_BOLT_WHIRL:
-                        me->CastSpell((Unit*)nullptr, SPELL_SHADOW_BOLT_WHIRL, false);
+                        me->CastSpell(nullptr, SPELL_SHADOW_BOLT_WHIRL, false);
                         events.ScheduleEvent(EVENT_SHADOW_BOLT_WHIRL, urand(15000, 30000));
                         break;
                     default:
@@ -438,7 +438,7 @@ class npc_spirit_shade : public CreatureScript
             {
                 if (moveType == FOLLOW_MOTION_TYPE && data == _summonerGuid.GetCounter())
                 {
-                    me->CastSpell((Unit*)nullptr, SPELL_DARK_OFFERING, false);
+                    me->CastSpell(nullptr, SPELL_DARK_OFFERING, false);
                     me->DespawnOrUnsummon(1000);
                 }
             }
diff --git a/src/server/scripts/World/npcs_special.cpp b/src/server/scripts/World/npcs_special.cpp
index 03631c5b808..dd8e313e54d 100644
--- a/src/server/scripts/World/npcs_special.cpp
+++ b/src/server/scripts/World/npcs_special.cpp
@@ -1603,7 +1603,7 @@ class npc_tournament_mount : public CreatureScript
                 if (apply)
                 {
                     _pennantSpellId = GetPennantSpellId(player);
-                    player->CastSpell((Unit*)nullptr, _pennantSpellId, true);
+                    player->CastSpell(nullptr, _pennantSpellId, true);
                 }
                 else
                     player->RemoveAurasDueToSpell(_pennantSpellId);