
Years of constant touring, alcoholism, & drug abuse finally began to affect Black Sabbath around the time of their fifth release, 1975's Sabotage. While it's not a bad album (in fact, it's one of their most underrated), you can sense that the magical chemistry that made such albums as Paranoid & Vol. 4 so special was beginning to disintegrate. But guitarist Tony Iommi again comes equipped with an arsenal of sturdy, ultra-heavy riffs, as evidenced by the raucous album opener, Hole in the Sky