Petr Hošek

Petr Hošek, also known by the stage names Blackie and Blackosh, is one of the founding members of Czech black metal group Root. He left Root after the recording of ''Madness of the Graves'' (2003). He also has some other musical side projects such as Cales and Blackosh. As of 2017 he is also a member of Master's Hammer, having previously collaborated with the band as a session member on their 2012 album ''Vracejte konve na místo.''. His first album as an official member of the band, ''Fascinator'', came out on 10 February 2018. As of early 2019, he is also a member of Nifelheim as their guitarist. Provided by Wikipedia