Demon Ascension: Battle of Realms

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?