I have a question about the new D.D. Assailant card that has come out in the Capsule Monster Colisseum game. In its effect, D.D. Assailant states that "when this card is destroyed as a result of battle with your opponent's monster, remove this card and the one that destroyed it from the game." Now on to my question. Does it have to be destoyed by a monster with the same attack so that it is destroyed "with" the opponent's monster? Or can its effect be activated any time that it is destroyed by my opponent's monster?