I would think the True Magics outright being stated to also getting negged by Avalon is huge. Easiest way to put this into perspective is how Zelretch can erase entire timelines as shown in Strange Fake, and yet the 2nd Magic still can't effect Avalon. Ergo, any "world destroying" statements is not only smaller scale but generally by people with abilities ranked below True Magic and lower scaling than Zelretch himself. Point is that Avalon is blatantly a very unique realm in of itself.
The dimensional aspect I don't care much for really, just the Avalon scaling.
*
Avalon
Rank: EX
Type: Bound Field
Maximum Targets: 1 Person
The sheath of Excalibur, a Noble Phantasm with its origin in the Fairyland Avalon where King Arthur rests. The wielder will heal from any wound, and the aging process will cease. Unleashing the true name of Avalon will deploy a Bound Field that provides the greatest defence. A Noble Phantasm that annuls the interference of True Magic; its existence is equivalent to True Magic.*
Avalon is obviously not beyond true magic, it just nullifies true magic in so far as it being an existence equivalent to True Magic. The interference of 2nd magic, is nullified specifically when applied to parallel worlds, which doesn't indicate superiority over every general application of 2nd magic.
It's a categorical error anyways, to suggest it's beyond true magic, when it's true magic itself or an equivalent of such.
So, it can be said definitely, that anything affected by the pruning system is 4D at max, and thus, could not affect Avalon. The pruning system even affects the Moon Cell, as well, as it is affected by timeline changes.
Is there any reason to believe pruning system is 4-dimensional?
Also, just to be clear, no, physically speaking avalon is not 'impossible' to destroy, however seeing as the planet defends it, as a reality marble of the planet itself, it makes it effectively impossible to destroy.
https://gyazo.com/2758e6ba72a0e90d130811bafa305322But outside of that, we've seen characters capable of nuking it, ORT in lostbelt 7, was gonna destroy the planet, not the planet of some timeline, no, him destroying chaldeas, creates a chain of events that lead to the destruction of pan-human history; thus every parallel world.
After that, ORT proceeds to spin its webs on the celestial body and end it, this doesn't say 'world' which bears more ambiguity and can just reference the parallel worlds, no, it explicitly says ORT will destroy the planet.
It's renowned as a planet eater anyways, this shouldn't be controversial
Back Alley Satsuki proves that the MEODP can’t exactly do that either. Ryougi is able to hit Ries’s lines of death through her shield-barrier thing. But when Ryougi tries hitting Artoria’s lines of death, it doesn’t work.
Lmao, what are we saying, Arcueid, you know the brain of the planet, is the one who says 'everything has a fated end'.
https://gyazo.com/9c502c4248774f4724866a2415c3bdachttps://gyazo.com/4aa76013aa925f5d41a552b401e7431e
when having a conversation with dust of osiris, who notes that if humanity were to prosper, she'd be the first to disappear because she's the brain of the planet and the celestial body will reach its end, when the age of will arrives and she doesn't even dispute this, she just says that's a conclusion (because destruction is the natural order of things).
It's just exceptionally difficult to see them, but the lines of death exist for the planet; seeing as how hard it was for tohno to destroy a building in the Arcueid route.
Without frying his blood vessels a tadbit. The fated end of the planet, is the entire point of the servantverse.
——————“Oh, what to say, I wonder really ... the Age of Gods is long past, and with what is soon to unfold, so too will the Age of the Fae end. It is the Age of Man - and that too will reach its eventual conclusion sooner or later. The day will come when this star of ours ceases to rotate, after which we will establish ourselves in the heavens, beginning the Age of the Will. Those incapable of volition without a frame of flesh and blood will be left behind in time. And yet... I wonder why I find myself so obsessed with humans.”
This is referenced by merlin in garden of avalon too.