The third series of emanations were the innumerable Ferouers of things and men--for each must have its soul, which shall purify them in the day of resurrection. In antagonism to all these, Ahriman produced an exactly similar host of dark and evil powers. These Devas rise, rank on rank, to their Arch-Devs--each of whom is chained to his planet--and their head is Ash-Mogh, the 'two-footed serpent of lies,' who seems to correspond to Mithras, the divine Mediator. After a reign of 3000 years Ormuzd entered on the work of realising his spiritual emanations in a material universe. He formed the sun as commander-in-chief, the moon as his lieutenant, the planets as captains of a great host--the stars--who were soldiers in his war against Ahriman. The dog Sirius he set to watch at the bridge Chinevat (the Milky Way), lest thereby Ahriman should scale the heavens. Ormuzd then created earth and water, which Ahriman did not try to prevent, knowing that darkness was inherent in these. But he struck a blow when life was produced. This was in form of a Bull, and Ahriman entered it and it perished; but on its destruction there came out of its left shoulder the seed of all clean and gentle animals, and, out of its right shoulder--Man. Ahriman had matched every creation thus far; but to make man was beyond his power, and he had no recourse but to destroy him. However, when the original man was destroyed, there sprang from his body a tree which bore the first human pair, whom Ahriman, however, corrupted in the manner elsewhere described.