In the manuscript of his notes for translators Tolkien stated that the Witch-king's name and background were not recorded, but that he was probably of Númenórean descent. It is unknown if his association with the realm of Angmar (or use of sorcery) can be traced to a time before he received one of the Rings of Power. In the Second Age, the Rings of Power were forged by the Elves of Eregion under Sauron's direction, and nine of these were given to men of the time, one of whom became the Witch-king. The rings gave them immense power, and they "became mighty in their day, kings, sorcerers, and warriors of old."
The rings also made them immortal, but eventually corrupted them, turning them into the ghastly, undead Nazgûl. The Witch-king became their leader. The Lord of the Nazgûl served Sauron as his second in command for over 4000 years. He fought in the war against the Last Alliance of Elves and Men. When Sauron was defeated by the Alliance, the nine Nazgûl went "into the shadows".
Recalled to the battle by the unexpected advance of the Rohirrim, the Witch-king attacked Théoden, who had outrun his own riders. Snowmane, Théoden's horse, was struck by an arrow and fell upon Théoden. As the Witch-king approached him for the kill, Éowyn, the king's niece, barred his way. She decapitated his mount, and the Witch-king replied with a powerful blow from his mace, breaking her arm and her shield. As he prepared to finish her off, Merry stabbed the back of the Witch-king's knee with a Dúnedain dagger which bore enchantments deadly to the Witch-king. Éowyn then thrust her sword into the void between the Witch-king's crown and body. Her sword shattered but the Witch-king's clothing fell to the ground and he vanished with a wailing cry.
This fulfilled the prophecy of Glorfindel, for the Witch-king fell not by "the hand of man", but by a woman and a hobbit.
Argonath RPG Member
Witchking, in the Argonath RPG community, is an IV:MP Division Leader, and is also known as [R*]Tandtrollet.
Witchking is also a member of the Rock Stars Clan, which is mostly composed of Argonath Administration members.