The Unfortunate Life of a Zanpakuto

You've heard of this before. He's young or old, naive or wiser, the same or powerful, kill someone or change everything, when he was still alive or beyond his birth, how or why he travel is for you to tell, but everytime he replace himself or only his mind remain. But in this story his new name holds power like a Zanpakuto, ...he replaced them. (Done rewrite, Enjoy, 06/08/2021)