Hawkwind - Warrior on the Edge of Time (1975)

Warrior on the Edge of Time is the fifth studio album by the English rock band Hawkwind. Many of the lyrics are by Michael Moorcock, and the album is loosely based on the concept of Moorcock's novel The Eternal Champion. It was the band's highest-charting album on the UK Albums Chart, where it peaked at number 13, and was their third and last album to make the U.S. Billboard chart, where it peaked at number 150. Reviews have been mixed, with Melody Maker panning the album and particularly criticizing the vocal work while the All Music Guide has praised the album for features such as the songwriting. This would also be the last album to feature the band's bassist Ian "Lemmy" Kilmister, who was fired from the band one day before the album's release.
The original album sleeve unfolds into a large shield-shape, revealing that the silhouetted Warrior is standing at the edge of an apparently bottomless chasm. The landscape on the other side of the chasm is a mirror image, with another setting sun, a closer inspection of this entire image reveals a helmeted face. The reverse of the cover depicts a bronze shield bearing the 8-rayed emblem of Chaos, as described in Moorcock's books.
(en.wikipedia.org/wiki/Warrior_on_the_Edge_of_Time)