Episode 73 - The Treasure’s Power! The Heart of the Pirate King

Episode 73
The Treasure’s Power! The Heart of the Pirate King
Japanese: 財宝の力！海賊王の心！
Zaihō no Chikara! Kaizoku-Ō no Kokoro!

The crew comes across a mysterious island that holds a key piece of information about the ancient weapons of the world. As they uncover secrets about the island, they find themselves facing a powerful group of mercenaries who have been guarding this knowledge for centuries. The Straw Hats must battle these mercenaries to protect the secrets and continue their quest.