Czech musical quartets

Trollech is a Czech band from Plzeň that plays black metal (Viking metal) music. The band was formed by Lord Morbivod and Asura Godwar Gorgon's Ray in 1999 and started performing live but did not release its first album until 2001. This album's genre has been labelled as "forest pagan black metal". The lyrics throughout are in Czech and apparently follow set themes revolving around forests, trees, castles, trolls, dwarfs, weather (thunderstorms, rain) and other natural entities in the mystical realm of Trollech, of which the musicians act as guardians.

Umbrtka is a metal band from Plzeň, Czech Republic. The band describe their music, which incorporates black, doom, industrial metal elements and is influenced by Czech underground, as 'grey' metal. The main themes of their lyrics are deserted industrial areas, factories, power plants, railways, dirty streets, trains, and other industrial elements.