'Droner' is the fourth Opium Warlords album, and brings an uncompromising musical vision to its most sparse form. It is noisy lo-fi riff music consisting only of particles unquestionably necessary; but at the same time with a musical spectrum that is very wide and open. It is experimental and avantgarde, still with roots deep in the very heart of heavy rock music. It is concrete blues, diving to the existence and the smallest molecular spheres of minimal riffs, and what seems to be an endless repetition of them.