Claim: Daniel Rostén is a Black Metal musician, a subgenre within heavy metal music.
Evidence: Black metal Musician Black metal is an extreme subgenre of heavy metal music. 
Daniel Rostén is a Swedish black metal vocalist, guitarist, and bassist, known as the frontman for Funeral Mist and singer/guitarist of Triumphator under the stage name Arioch, and for having been the vocalist for renowned Swedish black metal band Marduk since 2004 under the stage name Mortuus.