Chaos, aka Interstellar Navigation-Purpose Ultra-Massive Mothership is a megastructure whose sole purpose is to create the Machine Gods, also knowns as the Lostbelt Greek Gods( Zeus, Sutur, etc). Following Greek mythology, it’s the most powerful among all Olympic Gods.

Just by existing, Chaos is able to passively screw up with space-time.

To make things worse, since he screws up space and time, he passively creates cross-dimensional mazes rendering the distance between him and his opponents infinite.

Chaos is capable of replicating every single ability of the Atlantic Greek Lostbelt Gods since it created them (All of them scale to High Outer).

Including Zeus’ who literally has infinite layers of conceptual defences made out of authorities that are totally impenetrable.

and has abilities that shatter concepts,

and lightning that destroys souls,

and negates immortality and regeneration,

and is an existence in abstract form which is the very phenomenon that shapes the very world,

Speaking of Authority, it is an ability that basically grants “omnipotence.” In other words, it’s an ability that makes you do whatever you want because, apparently, “you have the right to do so”.

It’s a stupidly overpowered ability that Gods have, which gives them dominion over other beings. So for Zeus to have infinite layers of authority and also being capable of shattering them yet still be inferior to Chaos speaks volumes of how powerful and haxed Chaos is.

Chaos also has a very weird non-existent physiology in the sense that its very form/non-existence is beyond even non-existence.

That means it’s absolutely untouchable, and lacks any ability to be interacted with. Musashi had to reach a similar existence with it via some bizarro skill in order to interact with it at the cost of her own existence.

Now as for where it scales, it’s very easy. In Tsukihime, we are made aware that the main universe has infinite higher dimensions which can never fully be transcended, no matter how transcendent someone becomes, they would always be bound to the universe.

This makes the universe High Hyperversal (High 1-B). Meanwhile, the Gods aren’t from the Universe and no matter how much a servant ascends, they're still incapable of reaching the level of Divine Spirits and Gods.

Humans are entire dimensions below gods (lol),

And here;

That only applies on the surface,” my mentor added. “This place is different. Thematerial makes the houses less durable, but it’s not like the people here could havebrought down construction equipment. Just like Flue said, there is an excess of Manahere. Even though it is still dimensions behind the levels of the Age of the Gods, GreaterMagic Formulae are easy to cast here… of course, the mages casting the spells still haveto be skilled.”

This makes each God High Hyper-Low Outerversal, especially Zeus, who has infinite layered hax added to his existence.

Chaos, who’s astronomically above all the Gods combined, whilst being a void that lacks space and time,

being beyond even non-existence whilst also being beyond space and time, would make it Outerversal rather easily.

In conclusion, Chaos is a very powerful being amongst the Fate/Nasuverse and should be near the top tiers of the verse.

Ty for reading, lmfao. I'm sorry for this nerd ass session of mine.