The original title of "War Pigs" was "Walpurgis", dealing with the witches' sabbath. "Walpurgis is sort of like Christmas for Satanists. "And to me, war was the big Satan", said bassist and lyricist Geezer Butler. "It wasn’t about politics or government or anything. It was Evil itself. So I was saying 'generals gathered in the masses / just like witches at black masses' to make an analogy. But when we brought it to the record company, they thought 'Walpurgis' sounded too Satanic. And that's when we turned it into 'War Pigs.' But we didn't change the lyrics, because they were already finished."