Black Sabbath! is a mythos card. It first appeared in the
Dunwich Horror expansion.
Mythos Type: Headline
Gate Opens: Gate Burst at Woods
Clue Appears At: *Historical Society
Mythos Ability: All Rat-things, Witches, and Warlocks in Arkham are returned to the cup. If at least one monster returns to the cup, raise the terror level by 1.