The Witch King of Daranmar.

The Witch King was a sorcerer, who had a reign of terror around 174 SD-84 SD.  He was born in the old human kingdom of Durthinngar, which was located to the far west of Naldagor.  Durthinngar was known for dabbling in witchcraft.  He, the Witch King, or Serren, was born about 203 SD, in a small village in north Durthinngar, he was said to be born a wizard, so his parents sent him off to school at age ten, he was very powerful, and turned his interests toward black magic.  Serren graduated from the school at age twenty, he went to join a cult dedicated to Aralvras, he then took control of the cult and slowly seized control of Durthinngar.  Serren then started calling himself the Witch King, for he was a warlock and ruler of the old human empire, he also put his soul in an enchanted diamond and put it deep in his personal vaults in the Stormhead Mountains in north Durthinngar, thus becoming a lich.  He started to spread his rule to all corners of the world, none dared stand in his way, until his great-grandson, Deromir, and his sister, Lianna, a dragon rider, mustered together the small human rebel armies and drove the Witch King's forces back to Durthinngar.  The rebels called for help, but no other race dared anger the Witch King, but the high chief of Orvak, the orc Grougabash sent his finest battalion of orcs and hobgoblins and stormed the entire kingdom of Durthinngar as Deromir and Lianna led a fleet of Gelldorin airships and dragon riders against the Witch King's fleet at the Battle of Weatherborn's Pass.  Lianna was nearly killed in the battle, Deromir locked his great-grandfather in a duel, he used the legendary sword, Aetherwing, while Serren used his hand-made, enchanted flail, Sectemus, the Scourge of Men.  Deromir slew the Witch King, but was not able to destroy Sectemus.  Many dout Deromir killed the Witch King, it is said he sold his already extracted soul to Aralvras.  Durthinngar was destroyed by the Gelldorin fleet and the orcs, all that remains are some old necropolises and ruins of ancient cities.  It is agreed that the Witch King was the most vile and powerful warlock to ever walk Eilendor.