Traveling Through the Prehistoric Times: Signing in to the Ancestral God Egg at the Beginning

Welcome to the world of pirates! Exchange souls, I will act for you! When One Piece is finished, my grandson may have to burn it for me, so I decided to fill in the hole myself! Are Devil Fruits the Strongest? Doesn't exist! Is Shura the strongest swordsman? Doesn't exist! Among the Five Old Stars, Cyborg Kong is the strongest? Doesn't exist! The system is in place and everything is wasted! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.