Cosmic Undead

Jeremy Pence, a carefree easygoing man, has his life turned around after allegedly murdering his wife with no memory of how it happened. He is pulled into a dark world to be consumed by a demon who escaped hell.
However, trapped souls get to him first and they manipulate his living body to fight the demon. Jeremy doesn't trust the dead souls who claim to need his help, neither does he trust the little kid who is rumored to be the escaped demon from hell.
When the battle comes at him, he fights back and acquires ridiculous power. His mundane body is not worthy of the power, making the Cosmic Rulers to write a letter of death to him.
Cooperating with the dead souls to stay alive, he has to hold on to the power that has brought the death prophecy. The cause of his death is the only thing keeping him alive.