Sounds more like a mystical realms...not the scientifically defined sun.
I agree that the other characters like Thor without a hammer would be harmed from Firelords most intense attacks. I'm not trying to pick on Herc or anything, don't take it personal. Taking a attack from lots of those guys, like the BEYONDER, is kinda just novelty. The Beyonder is infinitely more powerful than Galactus. If Galactus can turn Herc into an Amoeba then so can the Beyonder. The Beyonder did all kinds of stuff when he was in his human form. But it didnt mean he was using his full power. The Thing beat the Beyonder in a fight! Doesnt give the Thing class 10^100000 strength and invulnerability.