[Coldsaturn]

We don't know if they mean something /in the game/ yet, but those shapes weren't chosen at random by infold, they apparently mirror in an uncanny way Kepler's platonic solid model.

"he leaves that place to chase an aether core (which i always presumed was the one that ended up in his eye)"
You'll need to watch his limited myth, but consider the option that he was chasing MC's aether core.

"that protofields exist around Wanderers, although which came first isn't clear to me"
There is a World Underneath text entirely dedicated to protofields. I can't promise it will make things clear, but it will establish a few solid points.

"we need an egyptian pharoah myth"
I so want something like that, you have no idea. I hope Sylus and Zayne's third myths will be prehistoric.