Nine Hells, Twin Souls

As nine calamities descend upon the world, gods and demons choose their successors—the abyss cages the damned, while holy light cloaks hypocrisy. Former best friends, one bears the nine demons to slaughter the world, the other wields celestial light to seal godhood. So-called righteousness and evil are but illusions; in the mortal realm, there are no angels—only fallen demons. — Description from novelcodex.org