243. Black Sabbath, 'Black Sabbath'
Warner Bros., 1970
Recorded in a single 12-hour blurt by a hippie-leaning former blues band, this lumbering debut conjured up a new, sludgy sound: the birth pains of heavy metal. The slide guitar on "The Wizard" and the grungy boogie of "Wicked World" would influence not only future metal spawn but even the sound of Nirvana.