Hanzu shu

The goes something like this (story):it's the prime era of demons and samurai when something abnormal happened one day a big Shockwave shock the land and what came ofthat shock wave humans slowly awakening powers to finaly fight back and as humans evolved over time there was eventually a tittle given to a lucky individual called a "demon slayer" which is given to a human of unbounded bravery and courage due to what thay did the slaying of a demon (the end):you a regular person meat what is described in whispers as a urban legend a feared man of night "the shadow slayer of dawn" it was a mistake but a great one here is your chance say hi