The Ikazkan butterfly effect = your Khatarait? Or was there something else there?
As it is, there's already a butterfly effect from Alex and Arandor here. Without them, there would have been no isekai'd Sonata. Well, certainly not in that form. And without her, no style. Of course, if you dig even deeper, without Livia, Tsukiko, and Aiyano there would have been no Tiarius, which is why history took that path. And Man's sword is exactly the one Crag forged for Sonata. And his loot is from the Coven too. And without Alaria (and Carneol, the ancestor of Alsira and Kenshiro) there would have been no Aconia, which Man is so obsessed with.
There's a hard connection to the Nine Ancient Obelisks there.