Got a response from Caleb! Hi Matthew, Great question. If there is no other player for the enemy to attack, then it is not able. In that case, the shadow effect is ignored and the attack resolves as normal. If there was another player, this shadow effect would end the current attack and immediately begin a new attack. Since you reveal shadow cards one at a time, if there are unrevealed shadow cards on the attacking enemy when this effect triggers, they would be discarded when this enemy makes