The Nazgul, or Ringwraiths, were Sauron\’s most terrible servants. They were originally mortal men, Sauron gave them the Nine Rings of Power in order to enslave them to his will and thus became Specters. Little is known about the Nazgul\’s real identities. It is said that three were great lords of Númenor. The Nazgûl were condemned to exist only in the spectral world. Their lives were so stretched until their very existence became torture. They were permanently invisible, except when they used black robes to give them a visible shape. Sauron, and whoever used the One Ring, could see them in their spectral form, like pale figures with flaming eyes, gray hair, white and gray robes, and silver helmets.