Mastered

http://images1.wikia.nocookie.net/__cb20060829175013/wowwiki/images/thumb/8/8b/Ability_creature_cursed_04.png/85px-Ability_creature_cursed_04.png	MasteredDefeat any of the X-Skulled bosses, on Master Difficulty .
==Rewards==
*[Helm of the Auditor]
Category:Feats of Legends