Souvenir Snatcher is a rare Creature — Bird card from Commander 2020 (C20), collector number 38. Current market price: $1.09, TCGplayer market prices via Scryfall.
Mutate {5}{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 Whenever this creature mutates, gain control of target noncreature artifact.