Demonic Cultivator In A Divine War

A person who ripped through the Martial World. A person who brought nations to their knees. Japan, China, Korea--all of their efforts were crushed in front of this man. This very demonic man. But he had a secret. He'd been reincarnated. His first life was hell - he belonged to a poor family, and to make matters worse his family was caught in a car accident...and his father and mother were killed while his sister was hospitalized. Holding the last of his family up on his own, this man overworked himself and died, only to find himself in a new world filled with martial arts and superhumans. Yet even that life was bound for ruin. Despite becoming the Heavenly Demon of the Martial World, a walking calamity, he was still alone. And his solidarity was what allowed his enemies a chance at killing him...which succeeded. But what would this man do if he was given a third chance? A demon like him wouldn't mind making a deal with the devil, would he? And thus, that's how he got involved in a war between the Gods and their Avatars. The battlefield? A world of anime. (Gonna be drawing heavily from 'Descent of the Demonic Master' for inspiration, so don't go complaining, yeah? Things are gonna go different than the original, I'm just using it as a foundation, I guess.)