Brainwash | Magic: The Gathering
Formats Brainwash is Legal in
Official Oracle Text for Brainwash
Enchanted creature can't attack unless its controller pays .
Official Rulings for Brainwash
10/4/2004 : If there are multiple combat phases during the turn, the attack cost must be paid each time if you want to attack with the creature.
10/4/2004 : Paying this cost is not an instant or any other kind of ability, it is an additional cost on the declaration of the attacker.