Tony Iommi, Black Sabbath guitarist and co-founder, told UK broadcaster ITV that Osbourne was “frustrated” during the band’s farewell concert on July 5. The heavy metal icon died less than three weeks later, on July 22, at age 76.

Black Sabbath's farewell show "energized" Ozzy Osbourne and "filled him with life. The Prince of Darkness died on July 22, days after performing five songs with the rock band