Kansas City's JPT Scare Band didn't release an album until the 1990s, yet the group has been recording its burly jams since the early '70s. If you dig thunderous proto-metal from the age of bell-bottoms and thick 'staches, then you need to explore Past Is Prologue. This wonderfully raw mishmash of once-forgotten demos is proto-metal heaven, particularly the 13-minute opus "Sleeping Sickness." In 2007, Classic Rock Magazine tagged JPT as "the lost pioneers of heavy metal." That's no overstatement. These dudes slayed with the best of them: Cactus, Black Pearl, Pentagram and so on.