book of the dead god

Jack is pretty average in almost everything job, education, love life, etc. but what he wasn't average in, was his possessions he possessed the book of a dead god who was the god of life and death. he could create any form of life he wished to and could kill any form of life he wished to. one day he realised that he needed to exchange a small portion of his own life force to do the things he did and what ever he killed something equal to it would be born and vise versa as such he realised that his own life was coming to a rapid end. but what he wasn't expecting was that after he died he wouldn't cease to exist rather he would be reborn into brand new world.