To start the year off with a double kick, we’re looking at five upcoming album anniversaries in 2021 of some of the most iconic heavy metal records from the past, tracing the impact they left on legions of heavy metal fans and the industry at large.   

Black Sabbath – Master of Reality (1971)

The third studio album by Black Sabbath, Master of Reality has been heralded by critics and contemporary artists as a foundation for doom, sludge, and stoner metal. Marked as the band’s…