Vraska, Soul of Stone is a rare Legendary Creature — Gorgon Wizard card from Reality Fracture (FRA), collector number 277. Current market price: $0.60 (foil $1.49), TCGplayer market prices via Scryfall.
Artifact creatures you control have vigilance. Whenever you cast a noncreature spell, create a 1/1 colorless Sculpture Treasure artifact creature token with "{T}, Sacrifice this token: Add one mana of any color."