Illuna, Apex of Wishes

Mutate {3}{r/g}{u}{u} (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.)
Flying, trample
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.