Sole member of South Wales Based Black Metal Assault Prometheus Rising, Marshall prefers to work alone in his endeavours rather than rely upon, and deal with others. Musically his work is quite diverse and explores varying style of Black Metal including Old School, Crust Punk, Black 'n' Roll, Symphonic and Depressive. His lyrical themes include Hatred, Historical Ideas, Political Themes and Protest Songs, Depression, Solitude and Suicide.