The Nazgul

The Nazgul are wraiths that serve The Dark Lord, Sauron. They serve his every command. The Nazgul are also referred to as The Black Riders, and The Ringwraiths. The Nazgul are some of the most horrifing creatures ever known in legends. The nazgul's primary weapon are there swords and daggers, The Morgul Blades. Should they land an injury on there opponent, a piece will break off in the wound, and work there way to there heart. The Result causes the victim to turn into one of the Ringwraiths.

Origins
The Nazgul were once 9 mortal men who took the Rings of power made for them. However, After Sauron fell, and the Ring fell into the river Anduwin, Sauron's dark spirit captured the nine after there passing, and turned there owners into The Nazgul. They ride out in search for Sauron's Ring, so Sauron can cover the land in a second Darkness, and rule all Middle-Earth.

When Frodo put the ring on, he saw what The Nazgul really look like before getting his injury. There world is the realm of Shadows, here they reveal there true selves as the Nine Men now ghosts. The Nazgul show no mercy when they want to find something or someone. Now The Nazgul seek revenge for there Master as well, including their Leader, The Witch-King of Angwar.

Trivia

 * The Nazgul will become Aaron's enemy in Aaron's Adventures of The Lord of The Rings.