Unstable Hulk is a rare Creature — Goblin Mutant card from Legions (LGN), collector number 115. Current market price: $0.25 (foil $3.46), TCGplayer market prices via Scryfall.
Morph {3}{R}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, it gets +6/+6 and gains trample until end of turn. You skip your next turn.