Persian

The Persian Sassanids are Zoroastrian, a dualist faith based around the worship of Ahura Mazda. However, they have darker side as well, as a dualist religion - a vast realm of daemons and devils lurks just outside the purview of Ahura’s light. Calling upon both sides of the divine coin, Zoroastrian clerics traffic in both the summoning of daemons through Ahriman and the fiery banishment of the unrighteous through Ahura Mazda.

Ahura Mazda
The Creator of all the World, Ahura Mazda is a stern but caring father figure to all humanity. He grants his faithful control over the Eternal Flame, the fiery symbol of his power, and is often worshipped by Zoroastrian clerics, paladins, and zealous pyromancers. He is the patron of judges, commanders, and those who fight against the forces of evil and darkness

Ahriman
The darker aspect of the dualist paradigm, Ahriman is the lord of the Underworld and King of Daemons. He is in constant conflict with Ahura Mazda, and grants his powers to those who would oppose the Creator - Diabolists, Warlocks, and clerics who dabble in the dark powers, chief among them.