Ozzy Osbourne has warned fans not to expect him to be the singer he once was at what is being billed as his final show this summer. On his Sirius XM radio show, Ozzy Speaks, the veteran frontman said he would only be partially on stage during the show.

Fans gathering in their masses, just like witches at black masses, should prepare for a reduced amount of Ozzy Osbourne at the upcoming final Black Sabbath concert. Speaking on the aptly titled Ozzy Speaks show on Osbourne’s SiriusXM channel [ via Billboard],

"I am doing what I can, where I feel comfortable," the legendary rocker shared Ozzy Osbourne will be performing the final Black Sabbath reunion concert at his own pace. On the SiriusXM channel Ozzy's Boneyard,

He will reunite with the original Black Sabbath lineup for what will most likely be his final performance. The show is happening in the band’s Birmingham hometown this summer, and it will include performances from both Sabbath and solo Ozzy Osbourne.