To the Persians, Angromainyus was the adversary of God. Although the Zoroastrian equivalent to Satan, Angromainyus is not a fallen angel nor does he answer to God. He appears in the Zendavesta, (a collection of holy Zoroastrian texts). In them he jumps from Heaven in the disguise of a snake and attempts to trick Zoroaster into rebelling against the Persian supreme power. He was unsuccessful.