Helm of Chatzuk

Artifact, 1 (1)

{1}, {T}: Target creature gains banding until end of turn. (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 a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Illus. Mark Tedin

Gatherer Card Rulings?, Legality?

• 10/1/2008: If 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.
• 10/1/2008: A maximum of one nonbanding creature can join an attacking band no matter how many creatures with banding are in it.
• 10/1/2008: Creatures in the same band must all attack the same player or planeswalker.
• 10/1/2009: If a creature in combat has banding, it's controller assigns damage for creatures blocking or blocked by it. That player can ignore the damage assignment order when making this assignment.

• Legal in Vintage (Type 1)
• Legal in Legacy (Type 1.5)
• Legal in Commander