Undercover — Unveil this identity only if another identity card has been unveiled or if another player attacked a Leader player this game.

Unveil {X}{X}{1}

When The Great Martyr is unveiled, you gain X life and draw X cards. Until end of turn, if a source an opponent controls would deal damage to a Leader player, that damage is dealt to you instead. The same is true for losing life, discarding cards and sacrificing permanents.