Jack of Hearts, Volatile Hero is a rare Legendary Creature — Alien Human Hero card from Marvel Super Heroes Commander (MSC), collector number 693. Current market price: $0.21 (foil $0.37), TCGplayer market prices via Scryfall.
Flying, haste When Jack of Hearts dies, he deals damage equal to his power to each creature. Power-up — {4}{R}{R}: Discard your hand, then draw three cards. Put two +1/+1 counters on Jack of Hearts. (Activate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn.)