A Black Mass is a Satanic ritual.
Black Mass may also refer to:
Arts and entertainment Literature Black Mass: Apocalyptic Religion and the Death of Utopia, a 2007 book by John N. Gray Black Mass, a 2000 book by Dick Lehr and Gerard O'Neill
Music Black Mass Sonata, a 1913 composition by Alexander Scriabin Black Mass (album), a 2011 album by This Is Hell Black Mass Krakow 2004, a 2008 video by Gorgoroth "Black Mass" (song), a 2016 song by Creeper "Black Mass", a song by Danzig from their 2002 album I Luciferi
Other uses in arts and entertainment Black Mass (comics), a DC Comics character Black Mass (film), a 2015 American film A Black Mass, a 1966 play by Amiri Baraka The Black Mass, an American radio program
Other uses Black mass (battery recycling), a common inactivated inorganic compound output from lithium-ion battery recycling Black body, an idealized physical body that absorbs all incident electromagnetic radiation Shadow person, a paranormal phenomenon also known as a "black mass"