Temporal Darkness Demigra (BT4-105) - Colossal Warfare

[Dark Over Realm 7] 4 (If you have at least 7 black cards in your Drop Area, you can play this card by sending all cards in your Drop Area to your Warp. [Over Realm] and [Dark Over Realm] can only be activated once per turn)
[Auto] When you play this card, choose up to 1 of your opponent's Battle Cards and send it to their Warp, then choose up to 1 Battle Card from your Warp with an energy cost of 4 or less and play it.