Sabbath's first three albums invented stoner metal and "Sweet Leaf" from 1971's Master of Reality was the coughing exclamation point on the genre.  Vol 4 would begin the band's three album cocaine cycle. Not only did Snowblind directly address the drugs hold on the band at the time but the entire record's energy, pace and production all somehow benefit from the speedy haze that misers Osbourne, Iommi, Butler & Ward were living in while writing and recording the album's ten songs at the Bel Air mansion of the now infamous John Du Pont.