I was explaining the Artifact transmuter to a friend of mine earlier, and they asked what Eonothem was. In geology, at least an [Eonothem](https://en.wikipedia.org/wiki/Eonothem) is all the rock that has been laid down into the geological record within a given eon, which ties into the concept of space pretty well. Is this why artifacts have power in the first place? As a combination of having a notable history and being aligned with one of the rules?
Have we already talked about how there's one artifact for each rule of Teyvat