Archangel of Revenge

Flying, Lifelink
Whenever a source deals damage to Archangel of Revenge, that source's controller makes a Saving Throw. (That player rolls a 20-sided die. If he or she rolls a number lower than the number of cards he or she has in hand, he or she fails the saving throw)
Whenever a player fails a Saving Throw, Archangel of Revenge deals damage equal to its power to that player.