The legend of lost guardians

Prologue

TIME LINE: XXXX
THE URBAN LEGEND:

We speak of a story which has been long forgotten or perhaps, it might have never existed. We speak of a land, an empire far away seen by none, but known by many (though now they pretend it didn't existed). When I was young, my grand-mother did not sing me lullabies or tell scary stories to make me fall asleep. But rather peculiar chronicle which made me awake all night. My mother always disliked that. However, I think you will find it rather fascinating like I did, after all you did not decided to read this for no reason, right?
"Some time ago, don't ask me when, for those were long forgotten days, we have very few intelligence of that era, there stood two powerful Empires. These were no ordinary dynasties of kings, queens and riches. They were filled with powerful magic and sorcery. So indestructible that no empire could rise before them. But there was harmony among them, for the rulers were both Sibling, bonded by their blood and love.
The First Kingdom was ruled by his Majesty, My Lord, who possessed Dark power beyond realm of death. The people of My lord called themselves the 'Black Caste'. They were proud of the dark power that resign inside them. The darkness inside them made them feel powerful and alive.
The second Kingdom was watched over by Her majesty, Milady, who possessed power of heaven beyond realm of life. The people of Milady called themselves the 'White Caste'. They too were also proud of the power that resign inside them. Both siblings, though differing in their sorcery, had maintained peace among themselves and the kingdoms within them.
The civilians of these kingdoms called themselves, 'Magnus', the magic users. For the usage of magic was common in those old forgotten days. The Magnus were proud of their origin. Their king. Their queen. And themselves. However, the pride of Magnus, lead them to their own destruction.
In time, the peace did not rule the land and was destroyed by the lust to gain power. My Lord was illuminated by the light and Milady fell into the darkness. Feeling betrayed by their own king and queen, the nation changed sides. A terrible war was waged and bloodshed was beyond imagination and very few survived . However, something ominous happened when MY lord and Milady fought. Unable to kill each other, both scarified themselves and their powers, in attempt to not take life of the other. Their powers combined and created something different. Something no nation has seen before. Some one beyond light and beyond dark. Perhaps they didn't belong here because they were,
Nor white.
Nor Black.
They were the "Grey caste".
The Guardians.

Those who survived the vivid War of pride, lost hope. They lost hope in their power. They forgot their people, their ancestors and their rulers. Slowly magic vanished. The history of Magnus, the pride civilisation , became a mere urban legend. Some who still possessed the gift, pretend it didn't exist and lived like normal being. Time passes, technology took over. The Magnus no longer felt the need of magic to survive. However, there were those who still believe in magic. They believed that the guardians will come and the kingdom of Magnus will rise again. Some died believing and some still to this day, believed that the guardians will come and restore the lost kingdom of Magnus. And hence the story began. The legend of lost guardians.