Person reborn in the void century of One piece becomes a legendary swordsman and blacksmith makes his own blade finds the soul soul fruit and puts his soul in the blade being forgotten by time due to the voice century and with his immense haki and whatever's left of the soul soul fruits power which was reincarnated in the devil fruit cycle he then gains the ability to possess his wielders
Goals and ambitions
Become the world's greatest swordsman of all time
If anybody would like to pick this up as a story feel free to I'm not much of a writer myself