Donquixote Doflamingo - 500 Years in the Future (OP07)

[Activate:Main] [Once Per Turn] (2) (You may rest the specified number of DON!! cards in your cost area.): Reveal 1 card from the top of your deck. If that card is a [The Seven Warlords of the Sea] type Character card with a cost of 4 or less, you may play that card rested. Then, place the rest at the bottom of your deck.