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.