What is one piece 433?

Episode 433 of the One Piece anime is titled "The Resurrected Dark Dark Fruit". In this episode, the Blackbeard pirates arrive on a deserted island where they discover the corpse of the former Shichibukai, Gecko Moria. Blackbeard then performs an unknown experiment using Moria's Devil Fruit, which results in the manifestation of its power being transferred to a member of his crew, Shiryu. Meanwhile, the Straw Hat Pirates face off against Bartholomew Kuma to protect their injured crewmate, Zoro. The episode ends with the revelation that Luffy has been sent to an unknown location by Kuma's Devil Fruit power.