Joint Assault | Magic: The Gathering
Formats Joint Assault is Legal in
Official Oracle Text for Joint Assault
—Avacyn's Cursemute Decree
Official Rulings for Joint Assault
5/1/2012 : Joint Assault checks whether the target creature is paired only when it resolves. If it becomes unpaired later in the turn, neither creature will lose the bonus. Similarly, if it becomes paired later in the turn, the creature it's paired with won't gain the bonus.