Roots of Mikael Åkerfeldt

Kiss was an American rock band formed in New York City in 1973 by Paul Stanley, Gene Simmons, Ace Frehley and Peter Criss. Known for their face paint and stage outfits, the group rose to prominence in the mid-1970s with shock rock–style live performances that featured fire-breathing, blood-spitting, smoking guitars, shooting rockets, levitating drum kits and pyrotechnics. The band went through several lineup changes, starting with drummer Eric Carr replacing original drummer Peter Criss in 1980, with Stanley and Simmons remaining the only consistent members. The final lineup consisted of Stanley, Simmons, Tommy Thayer and Eric Singer.

Sabbath Bloody Sabbath is the fifth studio album by the English heavy metal band Black Sabbath, released on 30 November 1973. It was produced by the band and recorded at Morgan Studios in London in September 1973. The writing process for the album, which began in Los Angeles, California, was initially hampered in part by the band's substance abuse and fatigue following its 1972–1973 world tour in support of their previous album, Vol. 4. In an effort to get past their writers' block, the band relocated to Clearwell Castle in the Forest of Dean, Gloucestershire, England, where guitarist Tony Iommi conceived the main riff of what became the album's title track and lead single.

Unblessing the Purity is the second EP by Swedish death metal band Bloodbath. It was released on March 10, 2008, on Peaceville Records. It is their first release since Resurrection Through Carnage to include Mikael Åkerfeldt on vocals. Per "Sodomizer" Eriksson replaced Dan Swanö on guitar beginning with this EP. The cover art is by Dusty Peterson, who won the band's contest for fan-made cover art. The album is packaged in a super-jewel case with a slipcase cut to fit. Unblessing the Purity is only available directly through mail-order via Peaceville Records or Snapper Music, and digitally.

Illud Divinum Insanus is the eighth studio album by American death metal band Morbid Angel, released on June 7, 2011 by Season of Mist. The album marks a shift in the band's sound, incorporating elements of industrial metal. It is Morbid Angel's first album since Heretic (2003), the band's longest gap to date between studio albums. This is the only Morbid Angel album to feature guitarist Destructhor and drummer Tim Yeung, making it their first not to feature Pete Sandoval, who was recovering from surgery. It is also the band's only album to feature bassist/vocalist David Vincent since he rejoined in 2004.