Question: What genre did the heavy metal band switch to in their career?

Context articles: Kawaii metal
Obús
List of gothic metal bands
Heavy metal bass
Massacration
Darkthrone
List of heavy metal festivals
Spiritism
El Fin De Los Inicuos
Insidiöus Törment

Kawaii metal (also known as idol metal, cute metal, or kawaiicore) is a musical genre that blends elements of heavy metal and J-pop that was pioneered in Japan in the early 2010s.
 A typical kawaii metal composition involves combining the instrumentation found in various types of heavy metal music with J-pop melodies and a Japanese idol aesthetic.
 Kawaii metal's lyrical topics are often less hostile than those of other heavy metal genres.
 The Japanese girl group Babymetal is often credited with the creation and success of kawaii metal.
 In addition to Babymetal, kawaii metal acts such as Ladybaby have also garnered media attention, as well as minor commercial attention, for performing songs of this genre.
Obús is a Spanish heavy metal band created in Madrid in the early 80s.
 They stood out because they took the risk of making a big spectacle in their concerts in order to reach to the level of other international heavy metal bands.
 In addition, the lyrics they write and the feelings they transmit connect with the people that follow them.
 As they said in an interview: "All our songs , some more and some less, have a meaning".
 Far away from renouncing to their genre, they have always claimed that they were a heavy metal band and they even wrote a song about this genre in their first LP called"Dosis de Heavy Metal".
In 2012, because of their 30th anniversary, they did a Tour around Spain.
This is a list of gothic metal bands.
 Gothic metal is a genre of heavy metal music.
 It is characterized as a combination of the dark atmosphere of gothic rock with the aggression of heavy metal music.
 The genre originated during the early 1990s in Europe as an outgrowth of death/doom, a fusion of death metal, doom metal, and gothic rock.
 The music of gothic metal is diverse with bands known to adopt the gothic approach to different styles of heavy metal music.
 Lyrics are generally melodramatic and dark with inspiration from gothic fiction as well as personal experiences.
Heavy metal bass is the use of the bass guitar (also called "electric bass") in the rock music genres of heavy metal and hard rock.
 The bassist is part of the rhythm section in a heavy metal band, along with the drummer, rhythm guitarist and, in some bands, a keyboard player.
 The prominent role of the bass is key to the metal sound, and the interplay of bass and distorted electric guitar is a central element of metal.
 The bass guitar provides the low-end sound crucial to making the music "heavy".
 The bass plays a "...more important role in heavy metal than in any other genre of rock."
Massacration is a Brazilian satirical heavy metal band, self-proclaimed "greatest and most classic heavy metal band, the inspiration behind most heavy bands since 1985, whose members' hairdos and posing influenced the whole heavy metal culture".
 The classical line-up consists of Detonator (vocal, Bruno Sutter), Blondie Hammet (lead guitar, Fausto Fanti), Metal Avenger (bass guitar, Marco Antônio Alves), Jimmy "The Hammer" (drums, Felipe Torres) and Headmaster (rhythm guitar, Adriano Pereira).
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.
This is an incomplete list of heavy metal festivals.
 Heavy metal (or simply metal) is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United States and the United Kingdom.
 With roots in blues rock and psychedelic rock, the first heavy metal bands such as Led Zeppelin, Black Sabbath and Deep Purple attracted large audiences, and during the late 1960s and mid-1970s these band and others in their genre were featured at a number of historic rock festivals. Judas Priest helped spur the genre's evolution by discarding much of its blues influence.
Spiritism is a spiritualistic philosophy codified in the 19th century by the French educator Hippolyte Léon Denizard Rivail, under the codename Allan Kardec; it proposed the study of "the nature, origin, and destiny of spirits, and their relation with the corporeal world".
 Spiritism soon spread to other countries, having today 35 countries represented in the International Spiritist Council.
El Fin De Los Inicuos (translated: The End of the Iniquitous Ones) was released in 1986 through the small Umbral label, company which was practically ruined, and would disappear some months later; after releasing the album "Un Paso Mas En La Batalla", band members Osvaldo Civile and Gustavo Rowek did quit, Walter Giardino (guitar), Miguel Roldan (guitar) and Gustavo Andino (drums) did replace them, but four months later Giardino is fired from the group because he had a fight with bassist and main man Ricardo Iorio, Adrian Cenci then replaces drummer Andino as well, to finally record this, their last album.
 After conversion to Christianity (something unimaginable a few months ago) and Spiritism (Iorio) the group records "El Fin De Los Inicuos", but the fans could not believe that the aggressive and heavy musicians that they had admired were singing Christian messages.
 The band was not considered heavy metal anymore.
Insidiöus Törment, also referred to as IT or (misspelled) Insidious Torment, is a Danish heavy metal band with Soviet roots.
 The heavy metal umlaut in their band name, a usually purely decorative device, is actually pronounced.
 In heavy metal, a musical genre that is sometimes described as "proto-fascist", the group is also known for being one of the few overtly socialist bands, along with some other notable examples, such as Accept.
 Like Accept in the lyrics to "Balls to the Wall", Insidiöus Törment also call for the oppressed to rise and rebel in such songs as "Metal Balls", "The Enticer" and "Call to Arms".