Håvard Ellefsen , Mortiis is his name

What Wiki says about Mortiis himself

Håvard Ellefsen

Håvard Ellefsen, often referred to as Mortiis, is the only band constant. He was born in Skien, Telemark. Mortiis began his musical career playing bass for the black metal act Emperor. He stayed with the band just over 1 year before going on to create his own solo project, though unlike his previous band the music would be dark ambient orientated. Ellefsen was experimenting greatly with music during his early solo career. Starting four separate projects, though the focus was always on Mortiis.

Ellefsen wrapped up work on the soundtrack to the movie Broken and The Devil`s Chair (Renegade Films) in 2007. Both films were directed by Adam Mason who first worked with him on the Mortiis video for Decadent & Desperate. Having completed an album’s worth of songs, Ellefsen commented at how they were “atmospheric and eerie” and also “very dark” while “some of it actually is semi-song structured, with some melody and sense to it.” They were done under the Mortiis name. The collected music, will eventually be released

as a Mortiis album.

Mortiis as a band was formed shortly after the release of The Smell of Rain.

Dark Dungeon Music was the personal record label of Mortiis. It operated between 1995 and 1999 while Mortiis resided in Halmstad, Sweden, and released mostly limited-edition vinyls. It was dissolved as Mortiis moved back to Norway in late 1999.