Abyssal Sovereign: The Demon's Dominion

This is a novel about a former human becoming a demon because of a game. Living the life as a demon from the abyss and crossing to other worlds (there will be different systems in use, different plots, and different powers; expect cultivation systems, game systems, magic systems, and much more).

His main objective is to destroy and cause chaos among the multiverse. Also, this novel uses a ranking that affects both the anime verse and comic verse. Void becomes a primordial demon and, step by step, changes the view of all races about demons; demons are not weak, demons are pure chaos. Note: the MC is cruel and indifferent to life. This is a dark novel; don't expect a hero or a son of destiny. In fact, Void isn't a typical villain—he is much, much crueler. Do not read if you are weak-minded. The start is a little bit rough, but the novel finds its footing after chapter 5.