Here Are the Songs Black Sabbath Practiced but Didn’t Play at Farewell Gig—and Why originally appeared on Parade.

The metal pioneers’ original lineup — Iommi, Ozzy Osbourne, Geezer Butler and Bill Ward — performed last Saturday at Birmingham, England’s Villa Park, marking their first show together in 20 years. They closed out the all-day event with a four-song set comprising “War Pigs,” “N.I.B.,” “Iron Man” and “Paranoid.”