Glorybringer is a rare Creature — Dragon card from Tarkir: Dragonstorm Commander (TDC), collector number 215. Current market price: $0.30, 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.)