Quote Originally Posted by Teah_Kaye View Post
10 chars..

I actually think unsundered souls might be sundered on death, since Emet splits into 7 little light motes when he dies in ShB. I think he and Hythlo also each split into 7 shards when they go back to the aetherial sea after being revived, but it's a little harder to count them with certainty in that scene due to the color of the sky and the fact that they kind of blend together a bit.

I think it's awfully coincidental and probably deliberate, considering there are 7 shards remaining if you include the Source and the Thirteenth/Void.
About those two
Emet already died in Shadowbringers so his soul should have already split if that was the case..which means that he should not have been able to use creation magic at the end of Endwalker. So yeah I too believe that we know have a bunch of souls in the lifestreams that are able to use creation magic.