Question: Which Norwegian black metal band invited Attila Csihar from Tormentor to do vocals on their first full-length studio album?

full_context: Document 1: Gorgoroth: Gorgoroth is a Norwegian black metal band based in Bergen. It was formed in 1992 by guitarist Infernus, who is also the only original member remaining, and the band have since released nine studio albums. Gorgoroth are a Satanic band and have drawn controversy due to some of their concerts, which have featured impaled sheep heads and mock crucifixions. The band is named after the dead plateau of darkness in the land of Mordor from J. R. R. Tolkien's fantasy novel "The Lord of the Rings".
Document 2: Dawn of the Black Hearts: Dawn of the Black Hearts is a bootleg live album by the Norwegian black metal band Mayhem. It is infamous for bearing a photograph of Mayhem's singer, Dead (Per Yngve Ohlin), after his suicide in April 1991. The photograph was taken by Mayhem's guitarist, Euronymous (Øystein Aarseth), when he discovered the body.
Document 3: True Norwegian Black Metal – Live in Grieghallen: True Norwegian Black Metal – Live in Grieghallen is Gorgoroth's first full-length live album, released by Regain Records. It was recorded live in the studio at Grieghallen Lydstudio in Bergen and Threeman Recordings in Stockholm. The songs on the album represented the most commonly played songs in Gorgoroth's live set. The cover design by Magnus Wohlfart was radically different from the previous three full-length albums, being more reminiscent of the cover of the album "Under the Sign of Hell" (1997). Most of the album was recorded before the departure of vocalist Gaahl and bass guitarist King ov Hell, who had intended on using the band's name and assets. The bass guitar for this album (originally performed by King ov Hell) was later re-recorded by guitarist and band founder Infernus. Infernus dedicated the album to the late Jon Nödtveidt of Dissection.
Document 4: De Mysteriis Dom Sathanas: De Mysteriis Dom Sathanas is the first full-length studio album by the Norwegian black metal band Mayhem. Songwriting began in 1987, but due to the suicide of vocalist Per "Dead" Ohlin and the murder of guitarist Øystein "Euronymous" Aarseth, the album's release was delayed until May 1994. "De Mysteriis Dom Sathanas" is widely considered one of the most influential black metal albums of all time.
Document 5: The Older Ones: The Older Ones is the first compilation album by Norwegian blackened death metal band Old Funeral, which was made up by key players in the Norwegian black metal scene, including bassist/vocalist Olve "Abbath" Eikemo (Immortal), guitarist Harald "Demonaz" Nævdal (Immortal) and guitarist Kristian "Varg" Vikernes (Burzum). By the time this album was released, the members had already gone their separate ways, with Immortal a going concern for Abbath and Varg in jail.
Document 6: Tormentor (musician): Tormentor (* 05.06.1972) is a black metal musician who is best known for his work as guitarist with the Norwegian black metal band Gorgoroth.
Document 7: Attila Csihar: Attila Csihar (] ; born 29 March 1971), also sometimes known as Void, is a Hungarian black metal vocalist, best known for his vocal work on Mayhem's "De Mysteriis Dom Sathanas" album. Author Ian Christe describes his vocals as "operatic."
Document 8: Darkthrone: Darkthrone is a Norwegian heavy metal band. It formed in 1986 as a death metal band under the name Black Death. In 1991, the band embraced a black metal style influenced by Bathory and Celtic Frost and became one of the leading bands in the Norwegian black metal scene. Their first three black metal albums—"A Blaze in the Northern Sky", "Under a Funeral Moon" and "Transilvanian Hunger" (sometimes dubbed the "Unholy Trinity") — are considered the peak of the band's career and to be among the most influential albums in the genre. For most of this time, Darkthrone has been a duo of Nocturno Culto and Fenriz, who have sought to remain outside the music mainstream. Since 2006, their work has strayed from the traditional black metal style and incorporated more elements of traditional heavy metal, speed metal and punk rock, being likened to Motörhead.
Document 9: Mustis: Mustis is the pseudonym of Øyvind Johan Mustaparta (born 10 September 1979), a Norwegian keyboardist best known for his work in the symphonic black metal band Dimmu Borgir, as well as the black/thrash metal band Susperia. Mustis joined Dimmu Borgir in 1998 and has contributed to the further progression of their ambient, atmospherical, symphonic sound. This can be heard in songs such as "Progenies of the Great Apocalypse," which he composed, on their 2003 album, "Death Cult Armageddon". His other studio work with Dimmu Borgir includes "Spiritual Black Dimensions" (1999), "Puritanical Euphoric Misanthropia" (2001), and the re-release of "Stormblåst" (2005) and "In Sorte Diaboli" (2007). Mustis departed the band in 2009 and issued a statement in which he implied that he was being kept out of the proper registration for music he was writing. Due to this, according to his statement, he was fired by text message and he will be allowing "the resolution come from the lawyers instead of dealing with more dishonesty and lies on a one-on-one personal level."
Document 10: Svartsyn: Svartsyn is a black metal band from Sweden. The band formed in 1991 as Chalice, but changed their name to Svartsyn in 1993. They recorded their first demo in 1994 and their first album in 1998. Draugen, ex-drummer of Dark Funeral, teamed up with original founding member Ornias in 1996 and since then, they are working smoothly together. In 1996 Svartsyn signed to Folter Records and released their debut album "The True Legend". In May of the following year, a tour of 9 dates in the Netherlands and Germany with Behemoth and Desaster was made. After this tour, Kolgrim (of Unpure) replaced Surth. In June 1997 Svartsyn released "Tormentor" 7” EP. In September 1997 and October 1998 Svartsyn recorded their 2nd album entitled "Bloodline" at Sunlight Studios, which was released as a limited D-LP by End All Life Productions from Italy. In February 2000, Svartsyn recorded their 3rd album "…His Majesty" at Voisin Studios and they signed to Sound Riot Records for the release of this album. In 2003, Svartsyn signed with Sound Riot Records again for the release of their fourth album "Destruction of Man" and for the re-print of "Bloodline" album including the "Tormentor" 7” EP as bonus track. "Destruction of Man" was released in the summer 2003 and "Bloodline" in September 2005. Their latest album is "Timeless Reign" which has been released through Carnal Records from Sweden.
Document 11: Incipit Satan: Incipit Satan is the fifth full-length album by Norwegian black metal band Gorgoroth. It was released on 7 February 2000 by Nuclear Blast, and reissued in 2006 by Back on Black Records. "Incipit Satan" was the first album with King ov Hell as bassist, the last album to feature Tormentor on guitar and the only one with Sjt. Erichsen on drums. The band members dedicated the album to their deceased friend and former bandmate Erik Brødreskift (a.k.a. "Grim").
Document 12: Tormentor: Tormentor is a black metal band formed in 1986 in Budapest, Hungary. They recorded their first album, "Anno Domini", in 1988, but were unable to release it until the end of communism. The album reached Norway through the tape-trading community. Following the suicide of Per Ohlin, Mayhem invited Attila Csihar from Tormentor to join the band; he was to perform the vocals on "De Mysteriis Dom Sathanas". Tormentor split up in 1991. After a long break they reformed and released the more experimental "Recipe Ferrum" through Avantgarde Music in 2001.
Document 13: Satan rir media: Satan rir media ("Satan Rides the Media") is a 1998 Norwegian documentary by Torstein Grude. The film covers the controversy that surrounded black metal musician Varg Vikernes in the early 1990s, who not only has been tied to a series of church arsons in Norway, but received widespread media attention for the murder of Mayhem band member Øystein "Euronymous" Aarseth.
Document 14: Euronymous: Øystein Aarseth (] ; 22 March 1968 – 10 August 1993), who went by the pseudonym Euronymous, was a Norwegian guitarist. Euronymous was a founder of and central figure in the early Norwegian black metal scene. He was a co-founder of the Norwegian black metal band Mayhem. He was also founder and owner of the extreme metal record label Deathlike Silence Productions and record shop Helvete.
Document 15: Mayhem (band): Mayhem is a Norwegian black metal band formed in 1984 in Oslo. They were one of the founders of the Norwegian black metal scene and their music has strongly influenced the black metal genre. Mayhem's early career was highly controversial, primarily due to their notorious live performances, the 1991 suicide of vocalist Per Yngve Ohlin ("Dead") and the 1993 murder of guitarist Øystein Aarseth ("Euronymous") by former member Varg Vikernes ("Count Grishnackh"), of Burzum.
ground_truth: Mayhem