Quote Originally Posted by Anonymoose View Post
Perhaps you can change how characters understand or relate to one another, or how they understand the situation as it unfolds, but will absolutely not cause a snowball effect, like, for instance, you make friends with one person so they ditch lunch with their other friend who gets sad and goes off into the shroud alone and takes it out on some opo-opos whose tribe flees for safety and ends up outside a Garlean base where they leave their half-eaten trash everywhere and some of it gets stuck in the gears of a Juggernaut on its rounds and then when it eventually returns to Garlemald for maintenance, the trash is pulled out of the gears and His Radiance shows up to raise troop morale on-base and slips on one of those opo-opo's tossed banana peels and impales himself on his gun-croissant. That probably won't happen.
I interpret things slightly differently. I see that mind-splitting headache as a symptom of you being kicked out of the echo, because something has substantively changed this time and history needs to slightly realign itself. The changes are small, but significant, broadly reflecting why they do what they do rather than reflecting their actual circumstances.

History would need to give Fye a new reason to wander the wood (becomes a senior conjurer maybe?), give Khrimm a new reason for his Hermitage and rebrand Dunstan in the eyes of many as harmless rather than a wildling, even though his supposed mission hasn't changed. It's enough to make your head spin.