Darkness Fall (BT27-111) - History of Z

[Activate:Main] [Limit 1] If your Leader is a black "Mechikabura" card : Choose up to 1 of your Battle Cards with a [Dark Over Realm] skill and it gains [Servant] until the end of your opponent's turn. Additionally, if the chosen card is a "Supreme Kai of Time" card, place up to 2 black Battle Cards from your Warp into their owner's Drop.