Errand of Duty | Magic: The Gathering
Formats Errand of Duty is Legal in
Official Oracle Text for Errand of Duty
—Arna Kennerüd, Skycaptain
Official Rulings for Errand of Duty
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, its controller assigns damage for creatures blocking or blocked by it. That player can ignore the damage assignment order when making this assignment.