Scritps/ICC: Fixed resistance calculation for Mutated Transformation (Professor Putricide) (#23858)

More Info in: #23837

(cherry picked from commit 9f7b464a6aa5b64bf5ec5c0f586853fbc71029c6)

2 files changed, 31 insertions, 0 deletions

diff --git a/src/server/game/Spells/SpellMgr.cpp b/src/server/game/Spells/SpellMgr.cpp
index fa2f12c437c..5ede1c15af9 100644
--- a/src/server/game/Spells/SpellMgr.cpp
+++ b/src/server/game/Spells/SpellMgr.cpp
@@ -4250,6 +4250,13 @@ void SpellMgr::LoadSpellInfoCorrections()
         });
     });
 
+    // Mutated Transformation (Professor Putricide)
+    ApplySpellFix({ 70402 }, [](SpellInfo* spellInfo)
+    {
+        // Resistance is calculated inside of SpellScript
+        spellInfo->AttributesEx4 |= SPELL_ATTR4_IGNORE_RESISTANCES;
+    });
+
     // Empowered Flare (Blood Prince Council)
     ApplySpellFix({ 71708 }, [](SpellInfo* spellInfo)
     {
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
index 37c84759489..2a8416c7de4 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
@@ -1654,6 +1654,29 @@ class spell_stinky_precious_decimate : public SpellScriptLoader
         }
 };
 
+// 70402, 72511, 72512, 72513 - Mutated Transformation
+class spell_abomination_mutated_transformation : public SpellScript
+{
+    PrepareSpellScript(spell_abomination_mutated_transformation);
+
+    /* Resist system always pick the min resist value for spells with multiple schools.
+       But following some combat logs of retail, this spell is a exception and need get the sum of both schools. */
+    void HandleResistance(SpellEffIndex /*effIndex*/)
+    {
+        Unit* caster = GetCaster();
+        uint32 damage = GetHitDamage();
+        Unit* target = GetHitUnit();
+        damage -= Unit::CalcSpellResistedDamage(caster, target, GetHitDamage(), SPELL_SCHOOL_MASK_SHADOW, nullptr);
+        damage -= Unit::CalcSpellResistedDamage(caster, target, GetHitDamage(), SPELL_SCHOOL_MASK_NATURE, nullptr);
+        SetHitDamage(damage);
+    }
+
+    void Register() override
+    {
+        OnEffectHitTarget += SpellEffectFn(spell_abomination_mutated_transformation::HandleResistance, EFFECT_0, SPELL_EFFECT_SCHOOL_DAMAGE);
+    }
+};
+
 void AddSC_boss_professor_putricide()
 {
     new boss_professor_putricide();
@@ -1677,4 +1700,5 @@ void AddSC_boss_professor_putricide()
     new spell_putricide_regurgitated_ooze();
     new spell_putricide_clear_aura_effect_value();
     new spell_stinky_precious_decimate();
+    RegisterSpellScript(spell_abomination_mutated_transformation);
 }