One Piece: Build The Strongest Beast Pirates

Barbarossa Kaishu, transmigrates to one piece and become the older brother of Kaidou of the Beasts while possessing a stronger physique talent!

After the Battle of the Gods Valley, the Strongest Assistant system was activated.

It can continuously improve the loyalty of the crew members while letting their Zoan-type devil fruit evolve.

Sengoku: Why all of the Beasts Pirates are Mythical Zoan Devil Fruit Users?!

Five Elders: Damn it! How can the Beasts Pirates be scarier than Rocks Pirates?

Garp: My iron fist can’t even break Kaishu’s defense at all!

Im: How can there be such a terrible monster? Why even Uran*s can’t kill Kaishu!!