Fortress: Choose one of your shields and attach this card to fortifythat shield. When the fortified shield leaves the shield zone, put this card into the graveyard. (Use "Shield Trigger" abilities before putting this card into the graveyard.) All of your creatures break twice as many shields. If the fortified shield isn't fortified by any other fortresses,whenever the fortified shield would be broken by your opponent's creatures, you may return 1 of your other shields to your hand instead.