[@TheMushroomLord] I was more going for that they are known, but I just didn't list them. It's a bit more like.... well, real life, where you start learning 'science' with like Chemistry and Physics but later on you've got a ton of other fields like geology, psychology, climate science, and that sort of thing. Only I guess it'd be a much broader field than science is.

I guess Literature and some of the humanities is a more fitting comparison. You can have general english and general literature and you'd consider that like your intro, or the general kind of knowledge you'd need at a certain level in the Akasha Agency. At the same time there's a [i]lot[/i] of random fields like Egyptology, Ancient Literature which is different, world history, political history, specializations in specific literature movements (like the enlightenment and whatnot), etc.

So the idea is that there's a general knowledge of the 'basic' arts (which I'm loathe to really define, since it's not something I feel needs to be defined if it's assumed that anyone can know it, and characters' expertise with it is going to vary anyway.), and then there's a bunch of specific Arts schools you may or may not have heard of.

Maybe actually I'll define an extra layer for Arts. So you have your broader 'Schools', you would consider them schools of thought, so all Arts under that School have a sort of basic premise that applies to all of them under that school. But a person will have a specific 'Style' of Arts which is the way those Arts are specifically cast which differentiates one group from another under the same school.

For example, under the [b]Sonshō(損傷)[/b] school, you may have learnt spells under the [b]Hibari[/b] style, which emphasizes large area of effect spells, or something along those lines? Kinda spitballing here but that would give it a more specific structure which you and others may be looking for?