The Demon Realm.
A few months had passed since Eyghon's passing, and not a peaceful day had gone by within the homeworld of the Outer Demons. In the long dimensional war between Earth and the Demon Realm, there has never been such a major turn of the tides.
Eyghon may have been artificial, but it was a Demon Lord through and through. It was a war machine, a nuclear bomb, an annihilation device, and most importantly… It was one of the Demon Realm's trump cards.
Losing Eyghon had turned the war on its head, and the Outer Demons knew they had to strike back. Using the authority of the Demon Sovereign, the Goddess of Fate, Uriel, had summoned the remaining Demon Lords and ordered them to gather their troops. A military overhaul on the planetary scale soon commenced as every able-bodied Outer Demon was rounded up and forced to join the invading army.
Soon, billions of Outer Demons had been gathered, trained and enhanced by the Demon Lords that commanded them.