Briarhorn is a uncommon Creature — Elemental card from Duel Decks: Ajani vs. Nicol Bolas (DDH), collector number 14. Current market price: $0.32, TCGplayer market prices via Scryfall.
Flash When this creature enters, target creature gets +3/+3 until end of turn. Evoke {1}{G} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)