Fall of the Abyssal King

Light is but the absence of shadow, with which darkening times encourage encroaching evil. So it was when Aylzrot, the Dragon King of the Abyssal Plane, invaded the lands of Éiféindü, ending the millennia long age of freedom the material realm had relished. A shadowed entity of deity defying indomitable will, none could hope to stand against him.
The lands were consumed as the heavens rained down the blood of the countless dead. Fields filled with the remains of those who rejected Aylzrot's will. All hope was lost and the world was plunged into abyssal darkness as Aylzrot sat upon his throne, victorious.
But, shadow is also the absence of light. Two constants, by godly design, that can never be fully expired. And so, a flicker of hope was sparked by the first of the Guardians...