Question: What Swedish avant-garde metal band formed in 2003 with the debut studio album The Butcher's Ballroom?

Context articles: Diablo Swing Orchestra
Aspera Hiems Symfonia
Pan.Thy.Monium
Pacifisticuffs
Cleric (band)
The Butcher's Ballroom
Hypno5e
Borderline Hymns
Pandora's Piñata
What's He Building in There?

Diablo Swing Orchestra is a Swedish avant-garde metal band formed in 2003.
 They have released three albums: "The Butcher's Ballroom" (2006), "Sing Along Songs for the Damned & Delirious" (2009), and "Pandora's Piñata" (2012).
Aspera Hiems Symfonia is the debut studio album by the Norwegian avant-garde metal band Arcturus.
 This was the only black metal album Arcturus released, though it still contains many of the experimental elements that are seen in their following albums, which shifted into the genres of avant-garde and progressive metal.
 Four songs are re-recorded versions of the "Constellation" EP and the other four are new songs.
Pan.Thy.Monium was a Swedish avant-garde metal band formed and led by Dan Swanö with several members from another project of his, Edge of Sanity.
 The group disbanded in 1996, after recording "Khaooohs and Kon-Fus-Ion".
Pacifisticuffs is the upcoming fourth studio album by Swedish avant-garde metal band Diablo Swing Orchestra.
 It is currently planned for an October 2017 release.
Cleric is an American avant-garde metal band based out of Philadelphia, Pennsylvania, United States.
 Formed in 2003, their initial lineup consisted of guitarist Matt Hollenberg, drummer Larry Kwartowitz, vocalist Nick Shellenberger and bassist Chris Weindel.
 After their first EP Chris Weindel was replaced by James Lynch, who was succeeded by bassist Daniel Ephraim Kennedy in 2012.
 Informed by metal pioneers such as Meshuggah, Converge, Fantômas, and Neurosis, the band is known for their experimental approach to grindcore, doom and avant-garde metal.
The Butcher's Ballroom is the debut studio album by Swedish avant-garde metal band Diablo Swing Orchestra, released in 2006.
 It features all four songs from their EP and disc debut "Borderline Hymns", along with 9 new songs, for a total of 13 tracks divided into two acts.
 It is the band's first release with singer AnnLouice Lögdlund.
Hypno5e is a French avant-garde metal band formed in Montpellier in 2003.
 They released their debut album "Des Deux l'Une Est l'Autre" in January 2007.
 Hypno5e uses lyrics in both French and English (as well as Castilian Spanish on "Tio" from their 2016 album "Shores of the Abstract Line").
 The band has toured throughout France and the United States with other bands such as Gojira, the Ocean Collective, Watcha, Black Bomb A and Eths.
Borderline Hymns is the debut EP by avant-garde metal band Diablo Swing Orchestra, released in 2003.
 It consists of four songs, all of which were re-used in their subsequent studio album debut, "The Butcher's Ballroom".
 It is their only record with original singer Lisa Hansson.
Pandora's Piñata is the third studio album by Swedish avant-garde metal band Diablo Swing Orchestra.
 It was released on May 14, 2012 in Europe through Candlelight Records and on May 22, 2012 in North America through Sensory Records.
What's He Building in There?
 was a Canadian avant-garde metal band, formed in 2006 in Waterloo.
 The band's music combined elements of funk, avant-garde metal and progressive rock.
 The band, named after a Tom Waits song from "Mule Variations", were known for their live show in which they usually wear outrageous costumes.
 They have been said to "create a sort of audio psychosis that totally envelopes and surrounds the listener like a straight jacket," and their debut album has been described as "an unlikable masterpiece."