Roots of Primal Fear

Mägo de Oz are a Spanish folk metal band from Begoña, Madrid formed in mid-1988 by drummer Txus di Fellatio. The band became well known for the strong Celtic feel to their music strengthened through their consistent usage of a violinist and flautist. The name for the band was chosen, according to founding member Txus, because "life is a yellow brick road, on which we walk in the company of others searching for our dreams." On the 26th of October, 2018, the band played a special concert to celebrate their 30th anniversary, playing with a symphony orchestra at the WiZink Center in Madrid.

Testament is an American thrash metal band from Berkeley, California. Formed in 1983 under the name Legacy, the band's current lineup includes rhythm guitarist Eric Peterson, lead vocalist Chuck Billy, lead guitarist Alex Skolnick, bassist Steve Di Giorgio and drummer Chris Dovas. Testament has experienced many lineup changes over the years, with Peterson being the only remaining original member. The band has released fourteen studio albums, four live albums, five compilation albums, thirteen singles and three DVDs. They are estimated to have sold over 1.4 million albums in the United States since the beginning of the SoundScan era, and over 14 million copies worldwide as of 2016.

Helloween is a German power metal band founded in 1984 in Hamburg by members of bands Iron Fist, Gentry, Second Hell and Powerfool. The band has at times been called one of the most influential European heavy metal bands of the 1980s. Its first lineup consisted of singer and guitarist Kai Hansen, bassist Markus Grosskopf, guitarist Michael Weikath and drummer Ingo Schwichtenberg. By the time Hansen left Helloween in 1989 to form Gamma Ray, the band had evolved into a five-piece, with Michael Kiske taking over as lead vocalist. Schwichtenberg and Kiske both parted ways with Helloween in 1993; Schwichtenberg died two years later as the result of suicide. Between then and 2016, there had been numerous line-up changes, leaving Grosskopf and Weikath as the only remaining original members. As a septet, their current lineup features all of the surviving members of the Keeper of the Seven Keys lineup, in addition to the remaining members from the Keeper of the Seven Keys: The Legacy-era.

Sin After Sin is the third studio album by English heavy metal band Judas Priest, released on 8 April 1977 by Columbia Records, and on 22 April in the UK, by CBS Records. Produced by Deep Purple bassist Roger Glover, it was the band's major label debut, their first album for the label, and their only album to feature drummer Simon Phillips, a studio musician who replaced drummer Alan Moore for the recording sessions.