As leader of the Heavenly Host, the Amesha Spentas, he battles Ahriman and his followers to rid the world of evil, darkness and deceit. His symbol is the winged disc.
In Persian belief, Ahura Mazdah ("Lord Wisdom") was the supreme god, he who created the heavens and the Earth, and another son of Zurvan. Atar, his son, battled Azhi Dahaka, the great dragon of the sky, and bound it in chains on a high mountain. The dragon was, however, destined to escape and destroy a third of mankind at the final reckoning, before it was slain. Ahura Mazdah was the god of prophetic revelation, and bore both Ahriman and Ormazd.