White Wolf

"Every other night, you can devour another player. You must stay stealth [sic] and pretend to be a normal werewolf, but you have to be the last player standing to win"

This wolf has to kill everyone including the other werewolves. He knows who the werewolves are but the werewolves do not know if he is or is not a white wolf, to them he just appears as a normal werewolf.