Zoroastrian
Mashya and Mashyana
The evil spirit, Angra Mainyu (Ahriman), sought to corrupt them and turn them away from Ahura Mazda's teachings.
Dualism and Cosmic BattleZarathustra's teachings include a strong element of dualism, with the constant battle between good (Ahura Mazda) and evil (Angra Mainyu or Ahriman).
He lives in a constant struggle against his twin brother, the principal or god of evil known as Ahriman. Both are children of the first creator god, Zurvã (time). Ahriman, as the firstborn son, was more powerful than Ahura-Masda and would have a reign of a thousand years. However, after this period, he would be defeated by Aúra-Masda.
Ahriman is also called Daevanam Daeva(daeva of daevas), which means evil god of evil gods or demon of demons.