"Seventh Son of a Seventh Son is the last great Iron Maiden album, reconnecting with the band's prog rock roots and reversing the signs of decline that had been evident on their previous record. By this point, Maiden had earned the respect of metalheads the world over with their steadfast adherence to unadulterated metal and their grandiose aesthetic. They'd made concessions neither to pop-metal nor to thrash, and their passionate fan base would never have tolerated a radical reinvention. But what do you do when your epic ambition itself has become a formula? You go even bigger and make a concept album, of course, and that's what Maiden does here, breaking out of the creative rut they'd fallen into on Somewhere in Time. The concept is based on the European folklore which held that the seventh son of a seventh son would be born with special powers that could be used for good or evil (and probably also in part by fantasy author Orson Scott Card, who'd touched on this idea in his own work). As such, the lyrics are Maiden at their most gothic, obsessed with supernatural mysticism of all stripes; the story line concerns the title character, born with a gift for prophecy but mistrusted by his village, which ignores his warnings of apocalyptic doom and makes him a tormented Cassandra figure. Musically, this is Maiden at their proggiest, with abrupt, stop-on-a-dime transitions between riffs, tempos, time signatures, and song sections."
- Allmusic
