Demonaz is a Norwegian musician best known as the guitarist and founder of the black metal band Immortal, one of the most influential acts in the genre since the early 1990s. His distinctive riff-writing style and raw, atmospheric sound have helped define the sound of Scandinavian black metal across multiple decades. With a career spanning over 30 years, Demonaz remains a respected figure in extreme metal and continues to create innovative music with Immortal.