Battering Ram is a common Artifact Creature — Construct card from Fifth Edition (5ED), collector number 353. Current market price: $0.11, TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, this creature gains banding until end of combat. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's blocking.) Whenever this creature becomes blocked by a Wall, destroy that Wall at end of combat.