Episode 207
Luffy’s New Promise! The Journey to the Pirate King’s Treasure
Japanese: ルフィの新たな誓い!海賊王の財宝を目指して
Rufi no Aratana Chikai! Kaizoku-Ō no Zaihō o Mezasite
The crew explores the deserted island and uncovers evidence of an ancient civilization that once thrived there. They discover a series of strange ruins and artifacts, leading them to suspect that the island is tied to the Void Century. The episode reveals more about the mysterious history of the Grand Line.