The Undying is a title awarded when you complete the achievement [The Undying]; within one raid lockout period, defeat every boss in Naxxramas on Normal Difficulty without allowing any raid member to die during any of the boss encounters.
The title will appear after the player's name:
<Name>, the Undying
Patch changes[]
Patch 4.0.3a (2010-11-23): This title can no longer be earned.
The Undying or 
[The Undying]; within one raid lockout period, defeat every boss in Naxxramas on Normal Difficulty without allowing any raid member to die during any of the boss encounters.
