Arzakon, Spiritcaller

+1: Reveal the top two cards of your library. Exile one of them and put the other into your graveyard.
0: Return target card from your graveyard to your hand with converted mana cost X or less, where X is the number of cards you own in exile.
-X: Draw a card, then put a 1/1 white Spirit creature token with flying onto the battlefield. Repeat this process X times.