Pentagram are one of the most enduring and influential underground bands in metal history with a trademark doom-laden style that's often compared to Black Sabbath. Laudatory reviews were abundant for 1987's Day of Reckoning, 1993's Relentless, and 1994's Be Forewarned, and they were bolstered by Pentagram's relentless touring and intense performances. Despite near constant lineup changes, singer Bobby Liebling kept the band alive. 2001's Sub-Basement was followed by several compilations. Liebling fronted the lineup of Internal Void as Pentagram for 2004's Show 'Em How. 2011's ...