Episode 874 - Luffy’s Ultimate Resolve! The Final Showdown for Pirate King’s Legacy

Episode 874
Luffy’s Ultimate Resolve! The Final Showdown for Pirate King’s Legacy
Japanese: ルフィの究極の決意！海賊王の遺産を守るための最終決戦
Rufi no Kyūkyoku no Ketsui! Kaizoku-Ō no Isan o Mamoru Tame no Saishū Kessen

As the Straw Hats explore the underground world, they encounter unexpected enemies who also seek the One Piece. These new foes are members of a secretive organization known as the Black Sea, a group dedicated to seizing the world’s most powerful treasures. Luffy and his crew are forced to defend the One Piece and protect the island from falling into the wrong hands.