One Piece: Start by Rebuilding Kuri

Dan D. Lyon realized that he had transmigrated into a Mythical Zoan-type Devil Fruit.



Just before his consciousness was devoured by the consciousness of the Yamata no Orochi Fruit, Dan awakened the Devil-Slaying Magic from Fairy Tail—Satan Soul. Dan declared, "Isn't a Devil Fruit just another kind of devil?" Starting with the absorption of the Eight-Headed Serpent Devil Fruit, he rises to become the ruler of Wano Country!



...Forty years later, when Zoro stands before Mihawk, battered and bruised, he can't help but ask, "A man like you... how are you not the world's greatest swordsman?"



"Frog in a well... have you ever heard of the Musou no Hitotachi (Sword of Empty Mind)?"