Otrimi, the Ever-Playful

Mutate {1}{b}{g}{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.)
Trample
Whenever this creature deals combat damage to a player, return target creature
card with mutate from your
graveyard to your hand.