The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
Demiurge created the Elder gods...
Gaia create demogorge (who kill demons and some elder gods) :
CHthon fears Demogorge and run for his life :
After Demogorge merges with the Sun, the Skyfathers and other beings arise...
So the power level is :
Demiurge > Gaia > Atum/Demogorge > Chthon > Dormammu~Odin~Glactus~Knull > Celestials~Gorr~THor...etc
Even Chthon and Set togheter could not kill Atum..
Chthon is so powerful that Dormmammu venerated him..
And Set in another marvel universe (Earth-9151) "eated" the phoenix force..
Thor himself generally only uses the Phoenix Force as a resource. He has never even thought about destroying the Phoenix Force. This doesn't even seem possible for him, even with the title of Allfather...When he faces doom for example :
While Set continued fighting for eternity inside the Eye of Agamotto against the Unipower (When Quasar becomes Captain Universe).