Overpopulation in Hell is constantly controlled by the sanctioned Demon Warriors by their Hell God. Otherwise, the world would collapse. They were called the Death Harbingers equipped with superpowers to kill demon souls just to maintain the balance of the Hell Realm.
The Hell God transmigrated on Earth with the sheer purpose of destroying the balance between the Three realms - Hell, Earth, and Heaven.
Dreygo Mondus, A Death Harbinger, ascended to Earth from Hell, with the help of an Angel and a prophetess, to stop the Hell God's madness. 
Can Dreygo and his comrades have enough arsenal to stop a God and save Billions of lives not only on Earth but also in Heaven? Can he stop and win the ensuing war between Hell and Heaven?

Demon Ascension: Battle of Realms

There were words unspoken and an awkward confrontation as they exited the foundry. Viriel was apparently silent and evasive upon the sights of Dreygo. The Harbinger was dubious about the contents of the book and the intriguing sacrifice needed for the Forbidden spells. Viriel wrapped it with white cloth and placed it inside a satchel. 


“Viriel, why are we going to Decadia?” Dreygo asked as they sauntered back to the quiet aisle. 


“If Sarakel is the traitor then the bombs will never be retrieved. And if I suspect Ebrahim is also a traitor then he will come back to Decadia to open the vaults of Megadishu.” 


“What are we going to expect in Decadia, Viriel?” 


“A city of Industry. It may be a ghost town for now but I know some souls remained. We might also meet the demon raiders of the Megadishu transports and most especially, there could be a Demon Lord. You are at full power right?” 


Decadia Ambush