text: A creature forced to attack does so only if it’s able to do so as attackers are declared. If, at that time, the creature is tapped, is affected by a spell or ability that says it can’t attack, or hasn’t been under that player’s control continuously since the turn began (and doesn’t have haste), then it doesn’t attack. If there’s a cost associated with having the creature attack, the creature’s controller isn’t forced to pay that cost, so it doesn’t attack in that case either.