Vulpikeet
From Ikoria: Lair of Behemoths set
Vulpikeet
Creature — Fox Bird
2/3
Mutate
(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
Whenever this creature mutates, put a +1/+1 counter on it.