This subgenre of black metal emphasizes instrumental virtuosity and technical skill over vocals and lyrics. The music is characterized by its fast, aggressive rhythms, dissonant harmonies, and atmospheric soundscapes. The lack of vocals allows the listener to focus on the intricate interplay between the guitar, bass, and drums, which can range from complex and chaotic to hypnotic and trance-like. The music is often associated with themes of darkness, mysticism, and the occult.