Gluttonborne Ibete

When Gluttonborne Ibete enters the battlefield,
target player searches your library for two creature
cards, exiles them, then you shuffle. That player
chooses one of those cards. Put X +1/+1 counters
on Gluttonborne Ibete, where X is the chosen
creature's converted mana cost.
The Ibete are mindless shadows of what will
never be.