Inuyasha: Invincible Demon Emperor

Reborn as the Western Kingdom's Second Prince in feudal Japan, Blood Prison Maru awakens with an ultimate skill system that shatters all limits. While ordinary yokai struggle to master a single legendary technique, he wields an endless arsenal—every basic attack rivals the mightiest forbidden arts. With power that eclipses even the great dog demon, he'll forge an unstoppable demon empire and claim dominion over the entire archipelago. Sesshomaru admits defeat before the battle begins. Inuyasha never knew his father, but he knows one truth: Blood Prison Maru stands above them all.