The conversation between human and AI assistant.
How does Morgoth's greatest servant compare to that of Sauron's?
That's quite the feat. What about the Witch-king? Has he ever been defeated in battle?
The Witch-king of Angmar was finally defeated by Eowyn and Merry during the Battle of the Pelennor Fields. He was killed by a blow from Merry's sword, which broke the curse he had placed on the sword many years prior.