Iranian Zār—that is, magic-users who were claimed by both Throne and Scepter, and thus were considered “Fey”—ruled part of Persia called Anshan. Since the Throne and the Scepter rule by siphoning all Fey magic away at birth, the Zār chose to refill their wells with music, making such amazing sounds that humans died dancing to it while the Zār absorbed all the energy and emotion from the whole experience.
Unfortunately, people of the The Darkness include any magical beings with a primary drive to devour or collect. More dine on Fey, and conflict grew until the Zār created an ultimate weapon to protect themselves… and then something went wrong.
The Zār are gone. The country of Anshan died, and a mountain made of shadow settled on the land over the capitol city, devouring everything, until there was absolutely nothing left.