Molly Hayes, Runaway is a common Legendary Creature — Mutant Hero card from Marvel Super Heroes Commander (MSC), collector number 698. Current market price: $0.30 (foil $0.27), TCGplayer market prices via Scryfall.
Power-up — {5}{R}: Put two +1/+1 counters on Molly Hayes. Exile the top card of your library. Until the end of your next turn, you may play that card. (Activate each power-up ability only once. Reduce the cost by her mana cost if she entered this turn.)