[Core / Spell] Fixed Amplify Damage (#1387)

Fixed Amplify Damage for Prince Malchezaar, this will no longer apply the effect on all players in the raid but only single player

src/server/game/Spells/SpellMgr.cpp

@@ -4468,6 +4468,12 @@ void SpellMgr::LoadDbcDataCorrections()
         case 37852:
             spellInfo->AttributesEx5 |= SPELL_ATTR5_USABLE_WHILE_STUNNED;
             break;
+                
+        // Karazhan
+        // Amplify Damage
+        case 39095:
+            spellInfo->MaxAffectedTargets = 1;
+            break;
 
         // Magisters' Terrace
         // Energy Feedback