“I couldn't afford a real bass guitar, so I just tuned the strings down on a Telecaster”: How Geezer Butler went from playing bass on a guitar to the ominous riff that defined one of Black Sabbath’s darkest moments

Black Sabbath: Geezer Butler, Tony Iommi, Bill Ward and Ozzy Osbourne.

Metallica, Guns N' Roses, Slayer, Tool, Pantera, Alice In Chains and Gojira were among the acts who took part in Black Sabbath’s final ever show in the band’s hometown of Birmingham, UK. Aptly dubbed Back To The Beginning, Sabbath's last rodeo marked the final chapter in an epic 57-year run by the unequivocal godfathers of heavy metal.

The cornerstone of this success, as well as Sabbath's undeniable influence, stems from its sophomore effort, Paranoid, released by Vertigo in September 1970. The songs from Paranoid became not only a blueprint for Sabbath's subsequent recordings, but also the template for legions of metal bands that followed in their wake.