I see some are trying to use unrelated analogies to define the UN, lol.
What I don't see is anyone posting a single piece of evidence
that even suggests the UN operates on various levels of power.
Simple ...
The Ultimate Nullifier is a Marvel comics production,
it has never ever been depicted shifting levels of potency to get the job done.
The UN uses one method,
it releases a nullification sphere that erases and/or recreates space-time.
This "nullification sphere" looks the same is the same no matter what size it is.
This "nullification sphere" can ONLY have ONE difference,
it can be expelled as a concentrated beam and/or sphere to attack a specific target
or it can be used in an omni-directional fashion, therefore erasing everything in its path.
In the end, what happens?
A specific target is erased, or an entire reality is erased.
Same result, same shit is the conclusion. (nullification)
Even in the Quasar scenario, it is known, had Quasar not concentrated on Magus,
he could've easily erased the Universe around him,
instead of just the intended target which was Magus.
Quasar never said, "oh, let me power down the UN,
or let me adjust the potency of nullification, or" ... bah yall get the picture.
What Quasar did do, was limit the size of the nillification sphere in order to attack one individual,
therefore avoiding erasing anything elase (including the Universe) which the same sphere was capable of.
heck, Quasar even states, "can't let the sphere mushroom out of control" 😬
This literally supports what I'm saying, well that and the fact that there's no proof to contradict this.
The UN Handbook bio makes NO mention of any variations of power/potency either.