Sabotage

Sabotage is the final release of Black Sabbath's legendary First Six, and it's also the least celebrated of the bunch, though most die-hard fans would consider it criminally underrated. The band continues further down the proto-prog metal road of Sabbath Bloody Sabbath, and this time around, the synthesizers feel more organically integrated into the arrangements. What's more, the song structures generally feel less conventional and more challenging.