Vorrac Battlehorns is a common Artifact — Equipment card from Mirrodin (MRD), collector number 271. Current market price: $1.83 (foil $9.08), TCGplayer market prices via Scryfall.
Equipped creature has trample and can't be blocked by more than one creature. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)