Core/Spells: Fixed damage from warlock's Death Coil

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

@@ -11029,6 +11029,8 @@ uint32 Unit::SpellHealingBonus(Unit *pVictim, SpellEntry const *spellProto, uint
                 scripted = true;
                 break;
         }
+        if (spellProto->Effect[i] == SPELL_EFFECT_HEALTH_LEECH)
+            scripted = true;
     }
 
     // Check for table values

src/server/game/Spells/SpellEffects.cpp

@@ -2354,6 +2354,8 @@ void Spell::EffectHealthLeech(SpellEffIndex effIndex)
     if (!unitTarget || !unitTarget->isAlive() || damage < 0)
         return;
 
+    damage = m_caster->SpellDamageBonus(unitTarget, m_spellInfo, uint32(damage), SPELL_DIRECT_DAMAGE);
+
     sLog->outDebug(LOG_FILTER_SPELLS_AURAS, "HealthLeech :%i", damage);
 
     float healMultiplier = SpellMgr::CalculateSpellEffectValueMultiplier(m_spellInfo, effIndex, m_originalCaster, this);