Holak is a guitar musician of the guitar band Kumka Olik and hip-hop duo Ma?e Cities. Author of texts for the SONAR project. A music producer working with rappers such as W. E. N. A. or This Type Mes. Graphic designer of covers for such artists as Happysad, Smolik and Wojtek Mazolewski. He is also involved in clothing design for the Alkopoligamia label. Introvert.