On July 22, the legendary Prince of Darkness, the father of heavy metal and one of the genre’s defining vocalists, Ozzy Osbourne, passed away at age 76. His health had been declining for years after a slew of back injuries, several respiratory infections and Parkinson’s disease. Despite his poor health, Osbourne still managed to put on one final concert mere weeks before his death. The concert was a massive metal bonanza in England which saw Osbourne perform nine songs – five with his solo band and four with the band that started it all: Black Sabbath.