■ ZERO : At the end of your opponent 's turn , if your opponent put a creature into the battle zone for no cost , you may put this D2 Field from your hand into the battle zone for no cost . (Whenever another D2 Field is put into the battle zone , put this D2 Field into your graveyard .) Denjara Switch —At the start of your turn , you may turn this D2 Field upside down for the rest of the game . If you do, destroy one of your opponent 's tapped creatures .