The greatest of Morgath's demonic servants is Klyss the Necromancer, Lord of the Gulmorvrin, Befouler of the Dead. Klyss often walks among mortal men in the form of an emaciated man in black robes. His face is unnaturally pale but rarely seen past the cowl that keeps it ever in shadow. His hands are withered, almost skeletal.
It is said that meeting the eyes of Klyss directly, or feeling his touch, destroys the will of mortals and results in "the fate which no flight escapes." A legend regarding Klyss involves a servant who encountered the Necromancer in a marketplace. Telling his master that Klyss had made a threatening gesture at him, the servant begged the loan of a horse and fled for a distant town. The master, curiosity overcoming trepidation, went to the market to see the truth of his servant's story. Seeing the figure of the demonic lord, he summoned his courage and asked Klyss why he had threatened his servant. The apocryphal reply was: "I threatened him not. My gesture was surprise at seeing him, for tonight I am to meet him in a far-off place." When he is not incognito, Klyss carries Udra, a staff of bone carved with thirteen skulls and thirteen orbs. Udra also bears, in ancient runes, Klyss' oath of fealty to the Dark One. The staffs powers and purposes are obscure.