A new power to introduce to the game?

I was thinking that a cool power to introduce to the game would be for one of the players (either by means of individually banking the most gold in a mission or by winning some other kind of game), to become "The Assassin". A one-time power, the Assassin can be either a Traitor or Faithful. When the power is awarded (and for maximum potency I think it should be awarded close, but not too close, towards the end of a series), the traitors do not meet that night to murder. Instead, the Assassin (who may be a traitor - but may not be) enters the traitors' headquarters alone and is given by the host the power to murder any one player of their choice - no matter whether if that player is a faithful or a traitor. After locking in their choice of who to assassinate, the Assassin is then told if the assassinated player was a faithful or traitor (obviously only relevant if the Assassin is a faithful). What they do with the information the following day is up to them.

Thoughts?