Ultimate Green Goblin is a rare Legendary Creature — Goblin Villain card from Marvel's Spider-Man (SPM), collector number 157. Current market price: $0.37 (foil $0.56), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, discard a card, then create a Treasure token. Mayhem {2}{B/R} (You may cast this card from your graveyard for {2}{B/R} if you discarded it this turn. Timing rules still apply.)