Question: What is the name of this heavy metal band from Copenhagen, formed in 1981, who were part of the album A Tribute to Judas Priest: Legends of Metal?

Context paragraphs:
Stained Class: Stained Class is the fourth album by British heavy metal group Judas Priest, released in February 1978.  It is the first of three albums to feature drummer Les Binks.  It gained notoriety for its dark lyrics and themes, as well as 1990 civil action trial where the band were accused of backmasking that led to the suicide attempts of two teenagers.  Stained Class was ranked as the greatest Judas Priest album on Stereogum.com, and was described by Steve Huey on Allmusic.com as “Judas Priest’s greatest achievement.”

Judas Rising: "Judas Rising" is a song by heavy metal band Judas Priest.  It is the opening track on the band's 2005 album Angel of Retribution.  The song is about the Judas Priest "Messiah" on the cover of the albums "Sad Wings of Destiny", "Painkiller" and "Angel of Retribution".  .  It was also included on the album's The Essential Judas Priest and

A Tribute to Judas Priest: Legends of Metal: A Tribute to Judas Priest: Legends of Metal Vol.  I and A Tribute to Judas Priest: Legends of Metal Vol.  II are tribute albums, both released in 1997 by Century Media Records.  It includes several rock and metal bands such as Helloween, Overkill, Saxon, Heavens Gate, Blind Guardian, Mercyful Fate, and Iced Earth, covering songs by British heavy metal band Judas Priest.  Some of the songs included in this album have been previously released by the artists.

Rob Halford: Robert John Arthur Halford (born 25 August 1951) is an English singer and songwriter, who is best known as the lead vocalist for the Grammy Award-winning heavy metal band Judas Priest and famed for his powerful wide-ranging voice.  AllMusic says of Halford: "There have been few vocalists in the history of heavy metal whose singing style has been as influential and instantly recognizable", possessing a voice which is "able to effortlessly alternate between a throaty growl and an ear-splitting falsetto".  Halford was voted number 33 in the greatest voices in rock by Planet Rock listeners in 2009.  In addition to his work with Judas Priest, he has been involved with several side projects, including Fight, 2wo and Halford.  In 1998, he came out as gay in an interview with MTV News.

Beyond the Realms of Death: "Beyond The Realms of Death" is a power ballad by British heavy metal band Judas Priest from their 1978 album, "Stained Class".  Vocalist Rob Halford's performance is considered one of his finest ever, and the guitar work is noted as well, especially the solos.  Many reviewers have called it one of the best songs on the album.  The song is considered a Judas Priest classic, with versions of the song appearing on the albums "Priest, Live and Rare", "'98 Live Meltdown", "Live in London", "", "Live Insurrection" and many of the group's compilation albums.  Drummer Les Binks has his only songwriting credit with the band for the song's main riff.

Hell Bent Forever: A Tribute to Judas Priest: Hell Bent Forever: A Tribute to Judas Priest is a tribute album, released in 2008.  It includes several rock and metal bands such as Motörhead, Icarus Witch, L.A. Guns and Sepultura, covering songs by British heavy metal band Judas Priest.  The album's font is a mistake because the red lettering is in the style of Iron Maiden's logo instead of Judas Priest's logo

Fight (band): Fight was an English-American heavy metal band assembled by frontman Rob Halford after his departure from Judas Priest in 1992.  He took with him from Judas Priest and Racer X drummer Scott Travis, though Travis also continued to drum for Judas Priest.  The line-up was completed by Russ Parrish on guitar, Brian Tilse on guitar and keyboards and Jack "Jay Jay" Brown on bass guitar, the latter of the two former members of Cyanide.

Demolition (Judas Priest album): Demolition is the fourteenth studio album by British heavy metal band Judas Priest, the first in the decade of the 2000s.  It is the second and final studio album to feature Tim 'Ripper' Owens on vocals.  It is the only Judas Priest studio album to feature a Parental Advisory label due to some songs featuring profanity: "Machine Man," "Hell Is Home" and "Metal Messiah" all carry explicit markings on the album's iTunes page.

War of Words (Fight album): War of Words is the debut studio album by English-American heavy metal band Fight, released on September 14, 1993 by Epic Records.  This is the first release Rob Halford recorded after his departure from Judas Priest in 1992.  He brought with him drummer Scott Travis from the band and recruited three new members.  The music is a mixture between the heavy metal sound created by Judas Priest and a thrash/groove sound similar to that of Pantera.  Halford is also credited with playing guitar but only recorded vocals for the album.

Mercyful Fate: Mercyful Fate is a Danish heavy metal band from Copenhagen, formed in 1981 by vocalist King Diamond and guitarist Hank Shermann.  Influenced by progressive rock and hard rock, with lyrics dealing with Satan and the occult, Mercyful Fate were part of the first wave of black metal in the early to mid-1980s.  Many of the bands from this movement went on to influence later black metal musicians in the 1990s, particularly in Norway.  Since the band's inception in 1981, Mercyful Fate have released seven studio albums, two extended plays and four compilations.

Supporting paragraphs: A Tribute to Judas Priest: Legends of Metal Mercyful Fate
Answer: Mercyful Fate