The nine Ringwraiths, once great kings and sorcerers of Men who were given nine of the Rings of Power by Sauron. The Rings extended their lives but enslaved their wills, and they faded into wraiths - neither living nor dead, invisible to mortal eyes, wielding terror as a weapon. Their chief is the Witch-king of Angmar. They ride flying fell beasts and are Sauron's most feared servants. No man can kill the Witch-king, a prophecy fulfilled when he is slain by Eowyn of Rohan, a woman, aided by the Hobbit Merry.