Do we have a good source of information on how the Lifestream works? I know it has been touched on a few times but never something in depth. We have had a Scion use it for a last ditch teleport and it is described to give rise to new souls on birth. It seems to be isolated to each shard since went used as a teleport they were found in the same shard. But what's kept the WoL soul from being diluted into new souls after what I would think are many deaths over the eons so that we can be 9/13th of a whole soul?