Roots of Necrophagia

Possessed is an American death metal band, originally formed in 1982 in the San Francisco Bay Area. Noted for their fast style of playing and Jeff Becerra's growled vocals, they are often called the first band in the death metal genre, and paved the way for the 1980s Bay Area thrash metal scene, along with Metallica, Exodus, Testament and Death Angel. The band is also notable for featuring then-teenage guitarist Larry LaLonde, who went on to join Primus.

Pantera is an American heavy metal band formed in Arlington, Texas, in 1981 by the Abbott brothers, and currently composed of vocalist Phil Anselmo, bassist Rex Brown, and touring musicians Zakk Wylde and Charlie Benante. The group's best-known lineup consisted of the Abbott brothers along with Brown and Anselmo, who joined in 1982 and 1986, respectively. The band is credited for developing and popularizing the subgenre of groove metal in the 1990s. Regarded as one of the most successful and influential bands in heavy metal history, Pantera has sold around 20 million records worldwide and has received four Grammy nominations.

Slipknot is an American heavy metal band formed in Des Moines, Iowa, in 1995 by percussionist Shawn Crahan, vocalist Anders Colsefni and bassist Paul Gray. After several lineup changes in its early years, the band settled on nine members from 1999 until Gray's death in 2010: Crahan, Gray, Joey Jordison, Craig Jones, Mick Thomson, Corey Taylor, Sid Wilson, Chris Fehn, and Jim Root. Slipknot is well known for its attention-grabbing image, aggressive style of music, and energetic and chaotic live shows.

Jussi Sydänmaa is a Finnish guitarist and a former founding member of the rock band Lordi, performing by the stage name of Amen until his departure in May 2022.