Ahriman | Zoroastrianism

(also Angra Mainyu)

Ahriman is the god of darkness, the personnification of evil. He is in constant opposition to Ahura Mazdah.

Zoroastrianism predicts that Ahriman will be destroyed, starting the fourth and final era of time - the first 9000 years represent a struggle between Ahriman and Ahura Mazdah, which ends with the victory of good.