Black Sabbath's 1972 song "Supernaut" is far from the band's most famous composition and it wasn't even a single, but the hardcore fans know it's an absolute masterpiece. It begins with one of Iommi's sharpest riffs and doesn't let up for five minutes. When the group met up with Led Zeppelin a few years later, this is the song John Bonham wanted to play with them. Sabbath drummer Bill Ward is a monster on this track, and it's a vivid reminder of how huge a role he played in their sound. It's a crime he isn't on this new album or tour. The fans didn't wait all these years for a partial reunion; his absence sullies the whole thing.