■ Whenever you tap a multicolored card in your mana zone , you may change the mana number to 2. (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, this turn you may summon creatures from your mana zone .