I am so privileged to have spent most of my life with him," Terence “Geezer” Butler said of his late bandmate and friend

G eezer Butler, the founding bassist of Black Sabbath, revealed how the band’s final concert came together weeks before Ozzy Osbourne ‘s death. In a tribute written for the Times of London, Butler said he was initially taken aback by Osbourne’s appearance when the band came in for rehearsals.

Ozzy Osbourne left behind a very heavy legacy. Here's a look at his best songs, from Black Sabbath's "Paranoid" to "Crazy Train" and "Mr. Crowley."