Roots of Omnium Gatherum

Dark Tranquillity are a Swedish melodic death metal band from Gothenburg, formed in 1989. They are considered one of the pioneering acts of the Gothenburg metal scene, which also includes bands such as At the Gates and In Flames. After a nearly three-decade long collaboration of four founding members frequent lineup changes between 2015-2021 have left only vocalist Mikael Stanne as an original member, together with long-time keyboardist Martin Brändström. The current lineup of the band consists of Stanne (vocals), Brandstrom, Johan Reinholdz, Peter Lyse Karmak, Christian Jansson (bass), and Joakim Strandberg Nilsson (drums).

Stam1na is a Finnish metal band native of Lemi, South Karelia. Their music is arguably best described as thrash metal with some progressive metal, death, alternative and punk influences, and is sung in the Finnish language. The band mainly uses seven-string guitars on all albums except the first one where they used six-strings, and a few songs were composed for eight-string guitar on the eighth album Taival.

In Flames is a Swedish heavy metal band from Gothenburg, formed in 1990. They are considered one of the pioneering acts of the Gothenburg metal scene, which also includes bands such as At the Gates and Dark Tranquillity. Their lineup has changed several times, with vocalist Anders Fridén and lead guitarist Björn Gelotte being the only consistent members since 1995. Since the departure of Jesper Strömblad in 2010, no original members remain with the band. The band has sold over two million records worldwide.

Dissection was a Swedish extreme metal band from Strömstad, formed in 1989 by guitarist, vocalist, and main songwriter Jon Nödtveidt and bassist Peter Palmdahl. Despite several lineup changes, Dissection released The Somberlain in 1993 and Storm of the Light's Bane in 1995 before splitting up in 1997 due to Nödtveidt's imprisonment for complicity in the murder of Josef Meddour.

Megadeth is an American heavy metal band formed in Los Angeles in 1983 by vocalist and guitarist Dave Mustaine. Known for their technically complex guitar work and musicianship, Megadeth is one of the "big four" of American thrash metal—along with Slayer, Anthrax, and Metallica—and is credited with helping to develop and popularize the genre. Their music features intricate arrangements, fast rhythm sections, dual lead guitars, and lyrical themes such as war, conflicts, politics, religion, death, and personal relationships.