Muca, Evolutionary Oddity

Muca, Evolutionary Oddity enters the battlefield with twice X +1/+1 counters on it.
Whenever a creature you control with a +1/+1 counter on it deals combat damage to an opponent, reveal the top X cards of your library, where X is the number of +1/+1 counters on it. You may put a creature card with converted mana cost X or less from among them onto the battlefield. Put the rest on the bottom of your library