If this "realmatic theory" thing holds for every planet/magic system, then I think the so-called "Enhancement" metals in Allomancy ought to be called "Spiritual" by virtue of the fact that they bolster or smother the somewhat divine/spiritual abilities of an Allomancer or those in close proximity. It certainly would make more sense to have an adjective instead of a noun for that category, considering the others are named that way.
Of course, this also might imply that there is a fourth Realm -
time, which may in turn imply that there is a fourth Magic (which is probably the "divine" magic).
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I think that, as all Scadrian magic derives from metal, so all Opelonian magic is based on shapes (runes). Recall that Dakhor bones are shaped in a particular way, and that they glow when their powers are activated. Also, ChayShan begins with a complex motion of the body, probably stopping at "magical" positions. I would not be at all surprised if it turned out that ChayShan led the body to shape itself like Jindoeese characters, and that the bones of a Dakhor monk resembled Fjordish runes. Nor do I think it is too much to suppose that Fjordish runes are linked to the geography of Fjordell, or that Jindoeese characters derive from the shape of the land of Jindo.
In that case, perhaps digging a wide chasm through a piece of Fjordell would invoke some sort of curse against the Monks of Dakhor.
Also, you probably got the number 10 from "Way of Kings," which is supposed to feature ten distinct magic systems. To my knowledge, no information has yet come to light regarding the total number of Shards in existence, though it is conjectured that 16 is a universally divine number and therefore there are probably 16 Shards.