Div-e Sepid (دیو سپید)

The White Demon, most powerful of the demons of Mazandaran, defeated by Rostam whose blood then restored Key Kavus's lost sight. Key Kavus, the Shah of Iran, unwisely attempts to conquer Mazandaran, the land of the Divs. Div-e Sepid captures Key Kavus, his commanders, and his elite soldiers, blinds them with sorcery, and imprisons them in a dark dungeon. Div-e Sepid had a son named Shabrang.