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.

De Profundis is the second album by the Polish death metal band Vader. The album was originally released in Poland by Croon Records and in the US by Pavement Music, but with no lyrics and a normal inner CD layout. It was re-released with a bonus track by Metal Mind Productions in 2003 with a cover of the Depeche Mode song "I Feel You". It was also re-released for Japan in 1997 by Avalon Records/Marquee Records with two bonus tracks.