The Golem
Identity — Guardian (U)
Undercover (Unveil only if another identity has been unveiled or if another player attacked the Leader this game.)
Unveil {6} (Start the game with this identity face down in the command zone. Turn it face up any time for its unveil cost.)
When The Golem is unveiled, target Leader player loses 6 life and you gain 6 life.
Leader players have hexproof and can’t be attacked. (Until you lose the game.)