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.

Known worldwide as the "Prince of Darkness" and the voice behind classics like "Crazy Train" and "No More Tears," Osbourne's influence on rock and metal is immeasurable. His groundbreaking work with Black Sabbath helped define an entire genre and inspired generations of musicians.