Conquest of the Sea is a 6-cost Purple event from Two Legends (077), C rarity. Effect: [Main] DON!! −2 (You may return the specified number of DON!! cards from your field to your DON!! deck.): If your Leader has the {Animal Kingdom Pirates} or {Big Mom Pirates} type, K.O. up to 2 of your opponent's Characters with a cost of 6 or less. The Four Emperors/Animal Kingdom Pirates/Big Mom Pirates