Card Rulings:The Dark Door


 * A single monster may still attack more than once while this card is on the field, such as "Hayabusa Knight", "Asura Priest", "Black Luster Soldier - Envoy of the Beginning", a monster equipped with "Twin Swords of Flashing Light - Tryce" or a Spellcaster-Type Monster affected by "Diffusion Wave-Motion".


 * If the effect of "Weather Report" is used to gain an additional Battle Phase, one monster may attack once each Battle Phase.

Mentions in other rulings

 * Amazoness Archers: Monsters that have already attacked cannot attack again. If "The Dark Door" is active, your opponent still can only attack with 1 monster. Monsters which cannot attack still cannot attack (Toon Monsters the turn they are Summoned, "Ultimate Obedient Fiend" under the wrong conditions, etc.) If "Diffusion Wave-Motion" is in effect, only the monster affected by "Diffusion Wave-Motion" can attack. The ATK reduction of "Amazoness Archers" is still applied in these cases where monsters cannot attack.


 * Berserk Gorilla: If "The Dark Door" is active and you control "Berserk Gorilla" and another monster, you can choose for your other monster to be the 1 monster that attacks.