Barrage of Boulders is a common Sorcery card from Khans of Tarkir (KTK), collector number 100. Current market price: $0.06 (foil $0.63), TCGplayer market prices via Scryfall.
Barrage of Boulders deals 1 damage to each creature you don't control. Ferocious — If you control a creature with power 4 or greater, creatures can't block this turn.