Voici l'exrait en anglais (il n'est pas encore sur le site) avec les nouvelles règles. Xavi91 aurait pu faire un effort au lieu de te critiquer, TTT.
702.19. Banding
702.19a Banding is a static ability that modifies the rules for combat.
702.19b “Bands with other” is a special form of banding. If an effect causes a permanent to lose
banding, the permanent loses all “bands with other” abilities as well.
702.19c As a player declares attackers, he or she may declare that one or more attacking creatures
with banding and up to one attacking creature without banding (even if it has “bands with
other”) are all in a “band.” He or she may also declare that one or more attacking [quality]
creatures with “bands with other [quality]” and any number of other attacking [quality] creatures
are all in a band. A player may declare as many attacking bands as he or she wants, but each
creature may be a member of only one of them. (Defending players can’t declare bands but may
use banding in a different way; see rule 702.19j.)
702.19d All creatures in an attacking band must attack the same player or planeswalker.
702.19e Once an attacking band has been announced, it lasts for the rest of combat, even if
something later removes banding or “bands with other” from one or more of the creatures in the
band.
702.19f An attacking creature that’s removed from combat is also removed from the band it was in.
702.19g Banding doesn’t cause attacking creatures to share abilities, nor does it remove any
abilities. The attacking creatures in a band are separate permanents.
702.19h If an attacking creature becomes blocked by a creature, each other creature in the same
band as the attacking creature becomes blocked by that same blocking creature.
Example: A player attacks with a band consisting of a creature with flying and a
creature with swampwalk. The defending player, who controls a Swamp, can block the
flying creature if able. If he or she does, then the creature with swampwalk will also
become blocked by the blocking creature(s).
702.19i If one member of a band would become blocked due to an effect, the entire band becomes
blocked.
702.19j During the combat damage step, if an attacking creature is being blocked by a creature with
banding, or by both a [quality] creature with “bands with other [quality]” and another [quality]
creature, the defending player (rather than the active player) chooses how the attacking
creature’s damage is assigned. That player can divide that creature’s combat damage as he or
she chooses among any number of creatures blocking it. This is an exception to the procedure
described in rule 510.1c.
702.19k During the combat damage step, if a blocking creature is blocking a creature with banding,
by both a [quality] creature with “bands with other [quality]” and another [quality] creature, the
active player (rather than the defending player) chooses how the blocking creature’s damage is
assigned. That player can divide that creature’s combat damage as he or she chooses among any
number of creatures it’s blocking. This is an exception to the procedure described in rule
510.1d.
702.19m Multiple instances of banding on the same creature are redundant. Multiple instances of
bands with other of the same kind on the same creature are redundant.