The Olympian amounts of drugs and alcohol that Ozzy consumed that got him fired from Black Sabbath in the '70s couldn't stop him from touring for decades.

The ants he snorted or flying animals whose heads he bit off never hindered his tour schedule. Grunge didn't stymie his ability to sell out arenas where he'd throw buckets of water onto the faithful in his front rows.

It was Parkinson's disease that took down our beloved Prince of Darkness and left him singing from a glorious throne Saturday night (7/5) for two bittersweet sets in Birmingham, England.

The near 10-hour parade of metal and rock giants concluded with John Michael Osbourne singing a short set from his distinguished solo career that began in 1980 shortly after being booted from Sabbath, widely known as the first huge metal act.

Then the final act was with his old chums Geezer Butler, Tony Iommi and Bill Ward, the original Black Sabbath, who proved that even well past retirement age, rock n roll will never die, but sometimes the drummer should keep his shirt on.

Some have called it more Loud Aid than Live Aid because the live stream and much of the other revenue garnered from the event was earmarked to several charities: Cure Parkinson’s, Birmingham Children’s Hospital & Acorn Children’s Hospice.

The tightly observed scheduled was aided by a revolving stage where as one band was rocking, the next could set up behind the curtain.

At 1:00 pm Mastodon took the stage, followed by Rival Sons at 1:20 pm, Anthrax at 1:40 pm, Halestorm at 2:35 pm, Lamb of God at 3:00 pm, the first Super Group appeared at 3:25 pm, Alice in Chains at 3:35 pm, Gojira at 4:30 pm, Chad Smith led a drum-off with Travis Barker and Danny Carey at 4:50 pm, the second Super Group rocked out at 5:05 pm which included Yungblud on "Changes."

Pantera came on at 5:35 pm, Tool at 6:15 pm, Slayer at 6:45 pm, Guns N’ Roses at 7:20 pm, Metallica at 7:55 pm, then Ozzy Osbourne rose from the depths under the stage in his throne as the sun set.

And soon tears fell, particularly when he sang "Mama, I'm Coming Home."

Due to timing and scheduling conflicts, some artists, like Judas Priest were unable to attend, so they sent video messages that were aired in between acts.

One video sent by Jack Black was a cover of "Mr. Crowley," from Ozzy's first solo debut, Blizzard of Oz, that the Tenacious D singer performed alongside Tom Morello's guitar-playing son Roman Morello, Revel Ian, Yoyoka Soma & Hugo Weiss.

Despite being such a long event, there wasn't any filler. The early acts were only granted a few numbers and everyone honored Ozzy with either a Sabbath cover or something from his solo discography.

The supergroups featured Lzzy Hale, Jake E. Lee, Mike Bordin, David Ellefson, Nuno Bettencourt, Adam Wakeman, David Draiman, Scott Ian, Whitfield Crane, Frank Bello, Yungblud, II from Sleep Token, Billy Corgan, Tom Morello, K.K. Downing, Adam Jones, Rudy Sarzo, Danny Carey, Papa Emeritus (Tobias Forge), Vernon Reid, Steven Tyler, Sammy Hagar, Andrew Watt, and freakin Ronnie Wood from the Rolling Stones.

Was every act good?

Yes. Some were great.

A prime example was Slayer who took the stage after a brutal set from Tool.

Their reunited lineup—featuring Kerry King, Tom Araya, Gary Holt, and Paul Bostaph—launched straight into “Raining Blood” with no preamble. The group was tight and those in the pit, including Jason Momoa, raged like it was 1986 all over again.

Their set included a wicked cover of Sabbath’s “Children of the Grave,” giving it the Slayer treatment with double-time drums and sinister harmonics. Between songs, Araya offered a tender moment, thanking Ozzy for “letting darkness into all our lives in the best possible way.”

Another example was the beautiful hodge-podge collection Tom Morello put together to perform the title track of Ozzy's third solo LP, Bark at the Moon.

The Rage guitar hero collected the perfect pieces like a kid arranges baseball cards. You had the singer of Ghost, the shredder from Living Colour, the bassist from Quiet Riot who joined Randy Rhoads when he defected to join Ozzy in '80, Nuno of Extreme, and the Blink guy on drums.

And as great as it was... Ozzy's original version is still better somehow.

Respectfully.

Likewise when he was fronting the group that would make up his last solo band, even while seated, he commanded all of our attention and most of our feels, for this would be the last time we would be welcomed all aboard the craziest train.

And when he got to play with his old mates, brief as it was, it was a respectable, strong, finale to a storybook career.

"Wow!! What an EVENT!! Extremely overwhelming!! Really great crowd!! Was very emotional for everyone," Guns N' Roses singer Axl Rose said on Twitter on Sunday generously using emojis and exclamation marks.

"MET OZZY!! (Crazy we’d never met b4!!) He was really great!! Was great to meet Sabbath!!" he continued. "Was hard as I imagine for anyone to watch his struggles while at the same time everyone was rooting for him n’ massively respecting the challenges he took head on n’ HE DID IT!!!!

Axl should be proud of himself and his band.

They did three Sabbath covers for the first time in their 40 year history and kicked off their set with a fourth they hadn't rocked in decades.

They were followed by Metallica who also live debuted a Sabbath cover, "Johnny Blad," and dusted off the 50 year-old Sabbath gem "Hole in the Sky," the lead track from the band's Sabotage album.

Metallica finished their set with a pair of tunes from Master of Puppets, the album they were supporting when Ozzy invited them on The Ultimate Sin Tour where they got introduced to their largest audiences to date and helped catapult their popularity.

"I’ve been listening to this band for 50 years," Smashing Pumpkins frontman Billy Corgan wrote on Twitter on Sunday.

"And there hasn’t been a year that’s gone by that I didn’t listen to them. They’re the band that I reach for when I’m having a hard time. They’re the band that I reach for when I want to get inspired. I will wear these pictures of us together on my heart forever."

Speaking of forever, for those of you wondering if this is the last Sabbath / Ozzy show forever? Tony Iommi has sad news.

"There will be no more comebacks, no more tours, and no more ‘final’ shows,” the guitarist said.

Guns N' Roses, however, are in the middle of their European leg of the Because What You Want & What You Get Are Two Completely Different Things Tour.

Get your tickets on their website.