Long, long ago, the mortal realms of Yor once lived in peace. All were blessed by the Goddess and wanted for nought, until one day the dragons descended from the heavens and laid waste to the lands. With wings of fire, they tore the world asunder, bringing a violent end to the Age of Bliss and ushering forth the Age of Darkness.
Calling out to the skies, humankind prayed for the Goddess to intervene and in answer she sent forth her warrior angels - radiant beings with wings of light - to do battle with the dragons. And there in the heavens did they clash for millennia.
So terrible and great was the destruction they wrought that the fields withered, giving rise to famine, and the dead lay in such number that a terrible miasma grew from their bodies, giving rise to disease. And in their desperation to survive, all who yet lived turned against one another, fighting over what little remained and giving rise to all consuming war.
Eventually, the angels of the Goddess prevailed against the dragons, but naught would be as it once was once was for the scars of the Great Battle lingered on. Food remained scarce, the miasma continues to plague the lands and all the realms could not forget nor forgive the hurts they'd inflicted upon one another.
Worse still, the presence of the dragons live on in those who partook of their blood and raised up arms in their service. These corrupted souls we call the Tainted will in time take on corrupted forms like that of their masters and if allowed to remain, they may yet complete the death of our world.
And so that is why we hunt them. So that the lands may one day heal, so that the realms of mortalkind may one day know peace and so that we, who laid the dragons low at great and terrible cost, may one day return to the side of the Goddess...

