From The Flames of Extinction (Book 1 : The Demon Conquests‪)‬

From the flames of extinction they have risen. Breaking away from the chains of destiny, from the grip of death itself, they have trampled across the bridge of reality. Riding upon the wings of destruction, wielding the fate of all life upon their blades, what once was dead has now returned to life. The empire of old will be lifted upon their shoulders, built from the ashes of the ruin they create. To devour all of Terra, the Demons have brought their conquests to the very soils of the Earth. But standing in their path are the last known remnants of hope, the lone defenders of life. Known as the Protectors of Terra, they are the flickering candle within the all-consuming darkness. But wherever there is light, the dark is always at its side. Even that flickering candle will cast a shadow, giving that light a darkness of its own.

So as these ancient inhabitants of Earth rise up to defend the long forgotten, war torn past from a foe thought to be gone forever, they will learn that forever hadn't lasted long enough.