Moon Girl and Devil Dinosaur is a rare Legendary Creature — Human Dinosaur Hero card from Marvel Super Heroes (MSH), collector number 421. Current market price: $0.37 (foil $0.39), TCGplayer market prices via Scryfall.
Whenever you draw your second card each turn, until end of turn, Moon Girl and Devil Dinosaur's base power and toughness become 6/6 and they gain trample. Whenever an artifact you control enters, draw a card. This ability triggers only once each turn.