Karolina Dean, Runaway is a uncommon Legendary Creature — Alien Hero card from Marvel Super Heroes Commander (MSC), collector number 694. Current market price: $3.66 (foil $8.41), TCGplayer market prices via Scryfall.
Flying At the beginning of your first main phase, add {W}{U}{B}{R}{G}. This mana can't be spent to cast spells from your hand.