Lord Mordimus

Lord Mordimus, originally known as Renvil Baleth, and also known as The Darkener, was an immensely powerful Dunmer necromancer, summoner, and vampire that lived during the Second Era, existed as a shade for the Third and early Fourth Eras, and re-entered Tamriel in the Fourth Era.

The exact history of Lord Mordimus is unknown, but some surviving texts describe him as a wizard who lived during the Second Era and battled against the Kamal during the Second Akaviri Invasion of Tamriel. It is believed that at this time Renvil sought power beyond the arcane alone and made a pact with the Lord of Domination, Molag Bal, transforming into a mighty and dreadful vampire lord.

It was said that Renvil's pride and love for himself caused him to abandon all morality and to dominate all life he came across. He used his powers of necromancy and blood magic to wreak havoc on southern Morrowind for years. He took on the name "Mordimus" at this time, and established a brutal and shadowy cult of vampires of which he was lord.

At some point in the late Second Era Mordimus met his end through unknown means, in the Velothi Mountains on the border of Skyrim. There, his followers set his body to rest within a dark and ancient cave which they began to dwell in, hoping to be present for when their master returned to the world of the living.