Episode 623 - Luffy’s Ultimate Test! The Battle to Become the Pirate King

Episode 623
Luffy’s Ultimate Test! The Battle to Become the Pirate King
Japanese: ルフィの究極の試練！海賊王になるための戦い
Rufi no Kyūkyoku no Shiren! Kaizoku-Ō ni Naru Tame no Tatakai

After narrowly escaping the mercenaries, the Straw Hat Pirates encounter a mysterious figure with information about the ancient civilization that once ruled the Grand Line. This individual reveals that the treasure is not just a material wealth, but a key to unlocking a lost power that could either save or destroy the world. The crew decides to follow the clues leading to the treasure’s true location.