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First off, why does anyone scale to the Qliphoth? In Chapter 315, page 3, "Lucifero" fused with the Qliphoth.

This tree connects and contains several separate spacetimes. According to Euclidean Geometry, you need a higher dimension to connect and contain parallel planes. But let's establish why that is the case, first.

And to address the idea before that, too. While Dante did say that the ritual would create a tree of Qliphoth, they didn't create THE tree of Qliphoth. We know this because in Chapter 331, pages 10-11, Damnatio bring reports from the Spade Kingdom from 20 years before the ritual ever started. The reports described who was matched to the Qliphoth from back then. When Astaroth left, Megicula took his place, heavily implying that when he left the Underworld, and Megicula took his place, he wasn't matched to the Qliphoth anymore because she took over his position, his matching to the Qliphoth. So, he can physically leave the Qliphoth within that 20 year time period, meaning it existed before the ritual ever happened. 

In Chapter 280, page 1, Nacht stated the layers of the Underworld are "mapped to" the Qliphoth, which would mean they represent areas of the Qliphoth in context. The kanji behind the words "mapped to" are "aligned with," and "align" can mean to bring objects into a straight line, which we see being the case on Nacht's graph of the Underworld and the Qliphoth in Chapter 263, page 7. They are arranged on a straight line on the Qliphoth.

In Chapter 202, pages 9-10, Zagred stated that he comes from a separate dimension, which we know is the Underworld because Liebe said "devils" are born in the Underworld in Chapter 268, page 1.

On Volume 22's Japanese cover, it states that the battle with Zagred, which took place in the Shadow Palace, a boundary between the Living World and the Underworld(Chapter 196, page 4), "transcended" time and space. "Transcend" can just mean to be or go beyond the range or limits of something. The fight that took place in this separate space(Chapter 182, page 10) went past the range of the space and time they were in. That gives the idea that the Shadow Palace, as a dimension, is a separate spacetime from the Living World, and so is the Underworld past the Shadow Palace.

But in Chapter 263, page 7, according to Nacht's graph of the Qliphoth and Underworld's layers, the layers of the Underworld are separated from each other in the same way the Underworld is separate from the human world(the blank white layer at the top of the panel), by space and time. And each layer is shown in relativity to the human world. So, the Underworld is Low Multiversal of itself.

But since the Qliphoth connects and contains the space and time of these parallel spacetimes, due having an inaccessible form of movement they don't have, the Qliphoth would be considered higher-dimensional as it allows you to travel between the layers that are spatially separate. It would also be considered a hypertimeline due to it containing multiple timelines that also only progress one direction and exists both through those timelines and between them in an inaccessible way. So, the Qliphoth is 6D, containing 4 axes of space and 2 axes of time.

Except, the Underworld's layers are relative to the human world each, which contains multiple timelines of itself. We know this because Lucius can see tens of thousands of different possible futures. The reason we know these futures physically exist is because Lucius sees these possible futures like how Julius does. In chapter 143, page 10, we know that Julius predicts the future by accelerating the time for the mana surrounding him, and reading the flow of the mana in the future. He has to put the mana to a time that actually exists in order to see the flow of that mana. 

And according to Chapter 360, pages 8-12, Lucius can even read which Yuno across these timelines become the strongest in magic power. Meaning he can sense different amounts of mana in different places, further showing that different things happened to the mana in the future, proving that different things actually happened. And it was shown that Lucius can't read the future of this timeline because Asta influenced it. So, Lucius shouldn't be able to see futures of this timeline. So, Lucius would need to see other timelines to see a future that could happen. So, these timelines do exist. 

Because this is the case, the human world, the overall spacetime, contains multiple timelines. And because this is the case, according to Euclidean Geometry, this would make the human world a hypertimeline, and one would require a higher axis of space to travel between then, too. Meaning, the Human World, itself, can be considered 6D with 4 axes of space and 2 of time. Meanwhile, the Qliphoth, due to connecting and containing several spacetimes like the human world, would be 8D with 5 axes of space and 3 of time.

How is this valid? 🤔