Tsjuder is a Norwegian black-metal band founded in 1993. The band's membership has varied over time; it split up in 2006 and reformed in 2010. The lyrics are written prior to the music, and are based on topics such as darkness, death, evil, hatred, demons, antireligious themes, Satanism, horror films, and the fictional book Necronomicon. The music is mainly written by the founding members, Nag and Draugluin. This photograph shows Nag, whose real name is Jan-Erik Romøren, in performance at the 2013 Party.San Metal Open Air music festival in Schlotheim, Germany.Photograph credit: Jonas Rogowski