■ You may add a card from your hand to your shields face down. If you do, choose one of your shields and put it into your hand. You can't use the "shield trigger" ability of that shield.
■ Look at your opponent's hand and choose a card from it. You may add that card to your opponent's shields face down. If you do, choose one of your opponent's shields and put it into his hand. They can't use the "shield trigger" ability of that shield.