Cheapest priced copy (Fourth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Battering Ram 
Artifact Creature — Construct · 1/1 · Common · Fifth Edition · #353
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.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
8 printings · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fourth Edition Foreign Black Border | 297 | Common | — | — |
| Fourth Edition | 297 | Common | $0.35 | — |
| Fifth Edition | 353 | Common | $0.35 | — |
| Antiquities | 41 | Common | $0.35 | — |
| Introductory Two-Player Set | 48 | Common | — | — |
| Renaissance | 107 | Common | — | — |
| Rinascimento | 105 | Common | — | — |
| Rivals Quick Start Set | 47 | Common | — | — |
4 rulings from Wizards of the Coast
- 1 October 2008A maximum of one nonbanding creature can join an attacking band no matter how many creatures with banding are in it.
- 1 October 2008Creatures in the same band must all attack the same player or planeswalker.
- 1 October 2008If a creature with banding attacks, it can team up with any number of other attacking creatures with banding (and up to one nonbanding creature) and attack as a unit called a "band." The band can be blocked by any creature that could block a single creature in the band. Blocking any creature in a band blocks the entire band. If a creature with banding is blocked, the attacking player chooses how the blockers' damage is assigned.
- 1 October 2009If a creature in combat has banding, its controller assigns damage for creatures blocking or blocked by it.