One Piece: Build The Strongest Beast Pirates

In 'One Piece: Build The Strongest Beast Pirates', Barbarossa Kaishu transmigrates into the world of One Piece as the older brother of Kaidou of the Beasts, possessing unmatched physical abilities. Following the Battle of the Gods Valley, the activation of the Strongest Assistant system enhances crew loyalty and evolves Zoan-type devil fruits. The presence of Mythical Zoan Devil Fruit Users among the Beasts Pirates baffles even renowned figures like Sengoku, the Five Elders, and Garp, showcasing Kaishu's formidable defense against the fiercest adversaries. Written in Chinese as a Web Novel, this action-packed story blends adventure, martial arts, and themes of kingdom building around an evil yet overpowered protagonist immersed in a world of pirates and systems.