Kael Black is reincarnated in an alien body, in an Underworld where low-class demons exist only to serve and die. Without a clan, without protection, and with nothing but his own will, he is thrown into a ruthless system that shapes his power through combat, risk, and sheer effort.

A story of organic, brutal ascension in a crossover world (High School DxD, Shinmai Maou no Testament, Rosario + Vampire, Fate), where power is not granted—it is seized, blow by blow, wound by wound, choice by choice.

A new fanfic similar to this one has already been created, but with some changes, improvements, and new ideas added. It already has 1 chapter posted.


Chapter 11 - Notice