Illuna Apex of Wishes

“Mutate 3(R/G)UU <em>(If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)</em> <br> Flying, trample <br> Whenever this creature mutates, exile cards from the top of your library until you exile a nonland permanent card. Put that card onto the battlefield or into your hand.”