Raff, Weatherlight Stalwart is a uncommon Legendary Creature — Human Wizard card from Dominaria United (DMU), collector number 311. Current market price: $0.20 (foil $0.22), TCGplayer market prices via Scryfall.
Whenever you cast an instant or sorcery spell, you may tap two untapped creatures you control. If you do, draw a card. {3}{W}{W}: Creatures you control get +1/+1 and gain vigilance until end of turn.