Duplicitous Confidant

Spy {1}{b}{b}{b} (You may cast this card for its spy
cost. If you do, this creature enters the battlefield
under an opponent's control.)
At the beginning of your upkeep, reveal the top
card of your library. You lose life equal to its converted mana cost. If you own Duplicitous Confidant, put that card into your hand.
"I would suggest moving quickly, my lord. No, I am
sure Queen Marchesa will never find out..."