Master of Disguise

Face-down creatures you control have Lurk {3}{u}{u} ({3}{u}{u}, Exile that creature: At the beginning of your next combat phase, put that creature onto the battlefield tapped and attacking. It can't be blocked until end of turn. Activate this ability only during combat.)
Whenever Master of Disguise deals combat damage to a player, you may put a card from your hand onto the battlefield face down.