Silhouetted Sanguisuge

When Silhouetted Sanguisuge enters the battlefield, look at the top card of your library
and exile it face down.
Whenever Silhouetted Sanguisuge deals combat
damage to a player, you may play the exiled card
until end of turn.
Shrouded in darkness, she awaits the man who
sees her face and gives her his heart.