The Damned is a new character card for Mascarade with this special ability: If the player of the Damned reveals his role, he is eliminated from the game. If the Inquisitor or the Usurper select the Damned as target for their ability, the Inquisitor or the Usurper are eliminated instead and the former Damned becomes the new Inquisitor or Usurper.
For more information: http://boardgamegeek.com/boardgameexpansion/146565/mascarade-damned
The Usurpur is a new character card for Mascarade with this special ability: The player who holds the Usurpur – or who is at least pretending to hold the Usurpur – points at another player and announces what he thinks this other player's role is. If he's correct, he gains the power associated with the role guessed. (Note that if the revealed card is immediately to the left of the Usurpur, the player who is next in line to play must take the second action: "Swap cards or not".)
For more information: http://boardgamegeek.com/boardgameexpansion/144984/mascarade-usurper
Note: These promos are also included in Mascarade Expansion