[ACT](RC) Darkness (This ability is active if cards have been put into your soul during this turn):[Retire this unit] If the number of cards in your soul is 20 or more, choose any number of cards with the darkness ability from your soul each with different grades, put them into your deck, and shuffle your deck. If you choose 4 cards, choose up to five of your units, and they get [Power]+6000 until end of turn.