Hell King in Other Worlds (paused)

After waking up in a sea of flames, the man called Cain gained a system that allows him to travel to different worlds. Where it would take him... nobody knows (not even I do, as I am just writing for fun). Disclaimer: I don't own any of the worlds or characters aside from the main character. First world: Danmachi Second world: we shall see... :) This is the first time, I am writing a novel. So be merciful haha. Just writing for fun