Episode 677 - Luffy’s Ultimate Challenge! The Battle to Become the Pirate King

Episode 677
Luffy’s Ultimate Challenge! The Battle to Become the Pirate King
Japanese: ルフィの究極の挑戦！海賊王になるための戦い
Rufi no Kyūkyoku no Chōsen! Kaizoku-Ō ni Naru Tame no Tatakai

Luffy and his crew manage to stop the ancient machine, but at great cost. The World Government's forces are relentless, and a final showdown between the Straw Hats and the government’s highest-ranking agents ensues. As the battle unfolds, secrets about the history of the Grand Line are revealed, deepening the mystery surrounding the island and its inhabitants.