Deathspell Omega is a French black metal band formed in 1998. Their lyrical content deals primarily with Satanism on a metaphysical level – as the band has stated that "all other interpretations of Satan are intellectually invalid" – and other various theological topics.

They have recently completed a series of three concept albums which focus on the theological aspects of God, Satan and man's relationship with the two. Some of their lyrical inspiration has come from the post-surrealist Georges Bataille as well as existentialist themes.

While information about the band's membership has never been officially confirmed (apart from Shaxul being known as the band's first vocalist), it is generally believed that Deathspell Omega was created by Hasjarl as a side project before Hirilorn broke up.

After Hirilorn split, it is believed that Shaxul, Hasjarl and Khaos carried on with Deathspell Omega as a three piece. Eventually, Shaxul is confirmed to have left due to his distaste for the band moving towards Orthodox Satanism, and is believed to have been replaced by Mikko Aspa on vocals.

Hasjarl is the owner of End All Life Productions and one of the main forces behind Norma Evangelium Diaboli. Mikko Aspa is the owner of Northern Heritage Records and Freak Animal Records (power electronics label), and is also believed to own a progressive rock label called Totuuden Sarvi Levyt.

Shaxul (ex-member) is the owner of Legion of Death Records.In December 2015, the band launched a Bandcamp site.Major releases:1999 - Disciples of the Ultimate Void (demo, later re-released as part of Infernal Battles)2000 - Sob a lua do bode / Demoniac Vengeance (split with Moonblood)2000 - Infernal Battles2001 - split with Clandestine Blaze2002 - split with Mütiilation2002 - Inquisitors of Satan2004 - Si monumentum requires, circumspice2005 - From the Entrails to the Dirt (four-way split with Malicious Secrets, Antaeus, and Mütiilation)2005 - Kénôse (EP)2005 - Crushing the Holy Trinity (six-way split with Stabat mater, Musta surma, Clandestine Blaze, Mgła, and Exordium)2007 - Fas - ite, maledicti, in ignem aeternum2008 - Veritas diaboli manet in aeternum: Chaining the Katechon (EP, also released on vinyl as part of a split with S.

V.E.S.T.)2008 - Mass Grave Aesthetics (EP, originally released in 2005 on From the Entrails to the Dirt)2008 - Manifestations 2000-2001 (compilation of previously released material from Mütiilation split, Moonblood split, and Black Metal Blitzkrieg multi-artist compilation)2008 - Manifestations 2002 (previously unreleased album)2010 - Paracletus2011 - Diabolus absconditus (EP, originally released in 2005 on Crushing the Holy Trinity)2012 - Drought (EP)Note that the material from the Clandestine Blaze split from 2001 contains material not on any of the other above releases.

There are also two untitled, comprehensive vinyl box sets, one a five-LP set compiling all the material from the Shaxul era (2000-2002) released in 2009 and the other a seven-LP set compiling all the material from the Mikko Aspa era's "trilogy" and related releases (2004-2012) released in 2012.