Ringwraith (Trilogy)

Once great kings of Men, the Ringwraiths accepted the gift of magic Rings from the Dark Lord Sauron long ago. From that time forward their wills became enslaved to his, their bodies withering until they became formless specters. Fear is their weapon and it follows them like a cloud wherever they roam carrying out their master's errands. When the Dark Lord puts forth the might of his armies against the land of Gondor, the Ringwraiths wheel high above the battlefield, on their fearsome winged mounts, their rending screams striking terror into the hearts of Men.