Glorybringer is a rare Creature — Dragon card from Amonkhet (AKH), collector number 134. Current market price: $0.36 (foil $0.98), TCGplayer market prices via Scryfall.
Flying, haste You may exert this creature as it attacks. When you do, it deals 4 damage to target non-Dragon creature an opponent controls. (An exerted creature won't untap during your next untap step.)