To note
You can't get Low Multiverse level durability from 2 universes collapsing like this for a few reasons. They only do so in the present, they only affect Hyperion in the present. A human-sized part between those universes isn't taking 2-C amounts of power, the 2-C power is the whole feat of the universes collapsing, this is environmental destruction, not something like a bomb blowing up in his face. The feat's unquantifiable as there is no way to know how much power went for every small part of the universe to be reduced to a white nothing. 2-C is also more than just destroying 2 universes, but the space between them too, and the universes were already too close when Hyperion took them collapsing.
I remember The Impress saying that the feat was much weaker due to the size of the dimension being far smaller than a universe, but idk based on what. The feat is very odd, it cannot be Low 2-C at all first of all, you can clearly see & it's stated that fragments of the terrain around and across the the universe survived for a long while, so the universe being destroyed cannot mean that it no longer has a past, present & future, but simply that it got destroyed normally, as it would have been standard to assume from the start anyway.
For it to be 3-A you would need to argue for some pretty hard environmental destruction to be going on, as the epicenter of what happened only got the terrain around fractured. It's likely that the realm wasn't even universe-size to begin with;
- The comic doesn't imply as much.
- It is later in a recap of those events in Defenders #1 that it's quickly stated that the universe was destroyed. The dialogue had already called the place a dimension, so it's not impossible that they meant to use another word for reality rather than to compare it to the real universe (The points below make me say that).
- In Incredible Hulk Vol 1 issue 269 Dark-Crawler refers to the dimension/realm as a "dimension-between-dimensions"; any dimension is "between-dimensions", so to specify it to be a "dimension-between-dimensions" implies it to be a weird dimension in between regular dimensions.
- In the comic where the feat happens Night/Dark-Crawler says "My dimension is a pathway to worlds which lie beyond!", like the universe, which is "adjacent" to it, Bruce having crossed a "forbidden border" to be there, and by the end of the battle Dark-Crawler saying that other dimensions existed alongside that one, sending the cast to the universe of his enemies, the Undying Ones, who wanted to use Dark-Crawler's dimension as a pathway to invade the main universe. So the Undying Ones' universe and the main universe are real universes with Dark-Crawler's dimension being adjacent & in between them as a pathway for both of them and more dimensions.
- The Marvel Legacy The 1980's Handbook and Official Handbook of the Marvel-Universe A to Z portray the feat in an underwhelming manner, only saying that they destroyed all the realm's land masses.
Also in
Defenders Vol 2 issue 1 Dark-Crawler is dragged from his home dimension to Earth against his will and by the end he returns to his home dimension, and
Official Handbook of the Marvel-Universe A to Z specifies this dimension to be the same one as the one in which he was fighting the Hulk (It's called "Dark Dimension", but it's not Darmammu's Dark Dimension, I wasn't saying it to avoid confusion). So, that throw away line in
Defenders #1 was misleading, that "universe" wasn't completely destroyed, just mostly destroyed to the point of being momentarily uninhabitable.
Could be poetic. "The fabric of" doesn't necessarily refer to all of something but a fundamental part of it, it being hyped out by being called "the fabric of" or "the very fabric of", so the fabric of infinity may refer to all infinity or a part of infinity itself, super complex as it may be, around where the feat is happening.
This feat's unquantifiable. They are fighting in the
Crossroads, a dimension that has open doors to an infinite number of universes. To say that in their fight their "consecutive force" "reverberates along the pathways leading from the Crossreads to an infinite number of dimensions" is far less impressive than the description you gave to the feat. The reverberation happens on the pathways, and since the pathways lead to infinite universes, that means "universes are being affected by this", not that "all infinite universes are being affected by this at once". The consecutive force of their fight is causing this, it's not even, meaning that the total amount of universes affected by the end isn't even the same as the universes affected per blow thrown in a measurable way. As in, Hulk punches enemy A, thus there are shakes in the Earths of universes 1 & 2 but not in universes 3 & 4, enemy A punches Hulk, thus there are shakes in Earths of universes 3 & 4, but not in universes 1 & 2, we don't know.
Well, there is a good argument to be made that this doesn't apply due to the Beyonder's retcon, which resets his staments and dealings with power to a much lower level, like the galaxy he destroyed at the start being just an illusion he made to appear to be that powerful -- implying even
that to be too much.
That could be poetic due to its power. The feat is for the Blood Colossus, not Thor.
We don't just assume it has the same rules & mechanics as Greek mythology would if you over analyze it, the feat's unquantifiable. We can probably assume that all of that falls if someone doesn't lift it, which would be Interstellar LS.
Ok mostly. There are shakes but "all levels of reality" aren't being shaked; mystical energies are being unleashed in them, which is not the same. That bit would simply be range, the rest of the feat is good.