If Black Sabbath never released an album after their 1970 debut, they'd still be legends. It's hard to imagine how heavy metal would have evolved had this album not existed. They recorded it in just two days in November of 1969, barely realizing they were breaking ground. They were simply four guys from Birmingham sick of hippie songs about peace and love. They wanted to write songs that would scare and thrill people like horror movies. The slow, haunting title track set the tone for their entire career. It was a sound they stumbled upon in rehearsal one day, and more than four decades later it can still send a chill up your spine. "N.I.B" showcases Geezer Butler's amazing bass skills, while "The Wizard" set the stage for about ten million metal songs about wizards and dragons.