The Echo - Mechanics and Boundaries

[Mjollnir]

As much as I'm in the "you're changing the past" camp, there are still some holes with the idea.

We've been told that an axe-swing in an Echo wont cause a hurricane in the present, but what of the flow of information backwards through time? Why doesn't it happen? Is it that if you attempt to make a change that would affect the timeline, you're auto-booted from that Echo? So folk can have a new memory of you, but as it didn't affect any of their actual actions or decisions, you were able to make those minor changes?

Hm.

As an aside, maybe the multi-shtola scene isn't due to The Echo. Actually, re-watching it, there's nothing at all to suggest that it is an Echo power. This could just be another high-level conjurer spell (eg, mirror image). I'd appreciate if you could point me to a scene where Y'shtola uses her own Echo power though!

I came to the same conclusions.
Farrimond's unit being attacked by a "shadow" is the closest we come to what might be an ascian reference.

How could it be an Ascian reference, if Ascians are known to be without shadow?