■ Whenever a creature attacks , if you have at least one darkness card and one fire card in your mana zone , you may reveal this creature from your hand and put it on the bottom of your deck . If you do, choose one of your opponent 's creatures that has power 3000 or less and destroy it. Oniend : When you put this creature into the battle zone , if any player has no shields , choose one of your opponent 's creatures that has power 6000 or less and destroy it.