Core/Spell: spells with ignore hit result should pierce damage immunities

src/server/game/Entities/Unit/Unit.cpp

@@ -7658,6 +7658,9 @@ bool Unit::IsImmunedToDamage(SpellInfo const* spellInfo) const
     if (!spellInfo)
         return false;
 
+    if (spellInfo->HasAttribute(SPELL_ATTR3_IGNORE_HIT_RESULT))
+        return false;
+
     if (spellInfo->HasAttribute(SPELL_ATTR1_UNAFFECTED_BY_SCHOOL_IMMUNE) || spellInfo->HasAttribute(SPELL_ATTR2_UNAFFECTED_BY_AURA_SCHOOL_IMMUNE))
         return false;