Wildcall
Wildcall {X}{G}{G}
Sorcery
Manifest the top card of your library, then put X +1/+1 counters on it. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
Latest set: [FRF] Fate Reforged (R)