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.

Possessed is an American death metal band, originally formed in 1983. 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 future Primus member Larry LaLonde, who was the guitarist for Possessed from 1984 to 1987.