Hell unfurling

After satan was assassinated, hell began to fall apart. Different factions unable to come to an agreement started fighting each other, the deep void sectors of hell where giant world ending creatures are help are beginning to break free from their restraints. The veil between the world of the living, hell, the plain of the ghosts and paradise have thinned and demons from hell are starting to terrorize the rest of the plains. The demons and the humans have created massive war machines, while ghosts and lost souls have stayed neutral but only fight back when attacked. And the people in paradise after hundreds of years without having to fight, they have done terribly defending against the demons