I have already fought the final battle in the Valley of Gods, but the system is only activated?

In the novel titled 'I have already fought the final battle in the Valley of Gods, but the system is only activated?', follow the mysterious journey of a time traveler who, armed with his divine body, conquers all the pirates. Just when facing the formidable navy and pirates in the Valley of God, the system suddenly comes to life! Dive into the adventure with Allen as he encounters a young Straw Hat Boy, destined to become the Pirate King, and embarks on a mission to defeat the future Pirate King Monkey D. Luffy at the age of 17. With intriguing twists and encounters with formidable characters like the black-haired Garp, this novel promises an exciting blend of action and mystery.