Goku Black, Future Decimator (BT10-051) - Rise of the Unison Warrior 2nd Edition

[Activate:Main] If your Leader Card is a blue 'Zamasu' or 'Goku Black' card : Place this card in your energy from your hand, and you can't place cards in your energy or play cards other than mono-blue 'Zamasu' or 'Goku Black' cards for the turn; at the end of the turn, if this card is in your energy, place it in its owner's Drop Area.