Cheapest priced copy (Mirrodin): $0.69 at Card Kingdom, near mint, their price list as of .
Vorrac Battlehorns 
Artifact — Equipment · Common · Mirrodin · #271
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.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.69 to $9.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 271 | Common | $0.69 | $9.99 |