Pouncing Shoreshark is a uncommon Creature — Shark Beast card from Ikoria: Lair of Behemoths (IKO), collector number 64. Current market price: $0.21 (foil $0.41), TCGplayer market prices via Scryfall.
Mutate {3}{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.) Flash Whenever this creature mutates, you may return target creature an opponent controls to its owner's hand.