Contagious Weakening Gas (C)

You may only cast this card if you have a 《Plague》 on your field. [Counter] Choose a card on your opponent's field. For this turn, when the chosen card attacks, put a card from your opponent's gauge into his or her drop zone, and deal 1 damage to your opponent! If this card is in the soul of a 《Plague》, all cards on your opponent's field get power-1000, and defense-1000!