Let’s start with the obvious. Ozzy Osbourne has seen better days. And after decades of ingesting enough booze and contraband to kill most of us, you never know which version of the rock legend will show up in concert.
Will it be the guy who’s had trouble finishing tours in recent years; the one that melted down and shuffled offstage after his voice blew out midway through Black Sabbath’s set in Auburn a few years back? Or will it be some semblance of the Prince of (bleeping) Darkness, the lovable madman that got this metal train rolling more than …