For their massive new double album Mole City, Quasi, the long-running indie duo of Sam Coomes and Janet Weiss, recorded a grand total of 24 songs, including the previously-posted “You Can Stay But You Gotta Go” and “See You On Mars.” You’d think that would be enough, but no. The band also made an all-covers CD called Interprets. It’s free with every pre-order of Mole City, and you’ll also be able to get it at the merch table on every stop of their massive forthcoming fall tour. Below, check out their wooly and surprisingly faithful take on Black Sabbath’s deathless 1970 politicians-are-evil classic “War Pigs,” which must’ve been an absolute blast to record.

Mole City is out 10/1 on Kill Rock Stars.