Episode 422 - Luffy's Vow! The Fight to Protect the Ocean's Destiny

Episode 422
Luffy’s Promise! The Battle to Save the Future of the Sea
Japanese: ルフィの約束！海の未来をかけた戦い
Rufi no Yakusoku! Umi no Mirai o Kaketa Tatakai

Luffy faces off against the leader of the new pirate group, who is revealed to be a former marine officer with vast knowledge of the Grand Line. The episode delves into the character’s motivations and history, highlighting the moral complexity of the pirate world.