Mystic Drawfist

Whenever you draw a card, you may pay {1}.
If you do, put a +1/+1 counter on Mystic Drawfist. If you have drawn two or more
cards this turn, Mystic Drawfist gains flying
until end of turn. Whenever Mystic Drawfist attacks, you may reveal the top card of your library. If it's a nonland card, you may cast it without paying it's mana cost.