Krzysztof Raczkowski, also known as Docent or Doc, was a Polish drummer, best known as a member of Polish death metal bands Vader and Dies Irae. He also appeared as a guest or temporary musician in Sw

Christ Agony is a Polish black metal band from Morąg, formed in 1990. Due to legal problems between 2005-2007 Christ Agony performed under the name Union.