Is a Dew that works with the druj Nasu and Daeva Aeshma. If a pious soul is ascending into heaven, he is one of the three who will pull your soul into the House of Lies.
And the evil spirit thought that the creatures of Ohrmazd were all rendered useless except Gayomard; and Astwihad with a thousand demons, causers of death, were let forth by him on Gayomard. 22. But his appointed time had not come, and he (Astwihad) obtained no means of noosing (avizidano) him; as it is said that, when the opposition of the evil spirit came, the period of the life and rule of Gayomard was appointed for thirty years. 23. After the coming of the adversary he lived thirty years, and Gayomard spoke thus: ‘Although the destroyer has come, mankind will be all of my race; and this one thing is good, when they perform duty and good works.’
And, afterwards, he (the evil spirit) came to fire, and he mingled smoke and darkness with it. 25. The planets, with many demons, dashed against the celestial sphere, and they mixed the constellations; and the whole creation was as disfigured as though fire disfigured every place and smoke arose over it. 26. And ninety days and nights the heavenly angels were contending in the world with the confederate demons of the evil spirit, and hurled them confounded to hell; and the rampart of the sky was formed so that the adversary should not be able to mingle with it.
Hell is in the middle of the earth; there where the evil spirit pierced the earth and rushed in upon it, as all the possessions of the world were changing into duality, and persecution, contention, and mingling of high and low became manifest.
For when a man passes from the loins of his father into the womb of his mother, then does Astwihad, (‘the Dissolver of Bones’ and demon of death), secretly (menokiha) cast a halter round his neck which for his whole life’s span cannot be shaken off, not through the power of a good spirit and not through the power of an evil spirit; (32) but after he has passed away, that halter falls from off the neck of the man who is saved through the good deeds that he has done, but the man who is damned is dragged to Hell by that very halter.”
(Chidag Andarz i Poryotkeshan: A Zoroastrian Catechism)