Bob, Reluctant HYDRA Agent is a uncommon Legendary Creature — Human Coward Villain card from Marvel Super Heroes Commander (MSC), collector number 649. Current market price: $0.28 (foil $0.66), TCGplayer market prices via Scryfall.
Whenever Bob attacks alone, return him to his owner's hand. If you do, each opponent loses 2 life and you gain 2 life.