A Lord Has Been Slain

http://images3.wikia.nocookie.net/__cb20060927235149/wowwiki/images/thumb/3/36/Ability_backstab.png/85px-Ability_backstab.png	A Lord Has Been SlainDefeat Tylious Dawnbane on Master Difficulty in Old Polcro .	25
Simply put, defeat Tylious on a harder difficulty.
Category:Old Polcro Achievements