Balmor, Battlemage Captain is a uncommon Legendary Creature — Bird Wizard card from Dominaria United (DMU), collector number 196. Current market price: $0.31 (foil $0.38), TCGplayer market prices via Scryfall.
Flying Whenever you cast an instant or sorcery spell, creatures you control get +1/+0 and gain trample until end of turn.