Locrian is an experimental / drone three-piece band from Chicago, Illinois, United States formed in late 2005. The band's music was described by Allmusic as an "eclectic mixture of black metal, electronics, drone, and noise rock". Allmusic writer Ned Raggett also identified progressive rock influences on The Crystal World. The band have identified krautrock and 1990s death metal as influences. Locrian was formed in late 2005 by André Foisy and Terence Hannum, who had previously played together in Unlucky Atlas.