Behemoth is a Polish extreme metal band from Gdańsk, formed in 1991. They are considered to have played an important role in establishing the Polish extreme metal underground.

Vader is a Polish death metal band from Olsztyn. Formed in 1983, the group was founded by then-bassist Piotr "Peter" Wiwczarek and guitarist Zbigniew "Vika" Wróblewski. Vader went through several lineup changes over the years, with Wiwczarek as the only constant member. Since 2022, the band has comprised Wiwczarek on lead guitar and vocals, rhythm guitarist Marek "Spider" Pająk, bassist Tomasz "Hal" Halicki, and drummer Michał Andrzejczyk.