This is classic Thor firing the God Blast directly at these guys one at a time, no ducking dodging or any shields and they stand there prepared for it, one shot per person, how well does each take it if anyone............
Superman ( new birth )
WW Hulk
Sentry
Thanos
Darkseid
Gladiator
Majestic
Silver Surfer
Capt. Marvel ( Billy )
DOS Doomsday
Thor once used Mjolnir to channel enough energy to severely hurt Galactus and make him retreat in order to avoid certain death. But when Thor used the Godblast on a Celestial, Mjolnir couldn't handle the energy and shattered.
So the Godblast seems to be more potent than energy strong enough to hurt Galactus badly. And if that's the case no one on that list remains standing in the end. Some might regenerate (including my boy), but absolutely everyone is a goner.
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I think Apocalypse horseman Slipstream could spread it out over the 5 seconds of his time phase and his carbon chain would only lose 1 link. Then he could replicate all 7 billion people in a time phase the way Collective Man contacts his Chinese.
So there are 250,000 similar dna of 1 person that can fill the damage of a godblast.
Galactus was extremely hungry and shortest height we've seen him
Galactus (along with all other characters) have variable showings in durability. Galactus was damaged from hits from BRB, Thor, Odin, Thanos, etc.
Juggs have tanked the blast with absolutely no damage or pain. Yet nowadays Juggs is pretty much a punching bag.
Lastly, if Galactus was in a forum fight then we use his highest feats of durability and disregard anything lower. But Galactus isn't in this thread and therefore, any feats against him must be assumed to be AVERAGE Galactus at best.