Lamb of God frontman Randy Blythe will be auctioning off a pair of custom Adidas that were made available to the performers who partook in Ozzy Osbourne’s farewell show, Back To The Beginning. The show was a charity event that raised over $190 million for charities selected by Osbourne.

In a post to his Instagram account, Blythe recounted that while at Comic-Con Midlands he got his pair signed by Osbourne, telling him that he would sell them to benefit the same charities as Back To The Beginning. Read the whole story below: