The Lord of the Rings has such a vast number of characters that they cover a range of personalities, powers, and moral viewpoints. The heroes are relentlessly opposed by formidable villains. Among them are the ever-terrifying ringwraiths, who act as servants to Sauron and the One Ring.
Source:https://www.cbr.com/lord-of-the-rings-terrifying-facts-ringwraiths/