Why are there pixies, etc. on the First but not the Source?

[Iscah]

We can sefely assume that the Concept of Pixies came from the unsundered world, but now we have a problem :
Pixies on the first (along with fuath) come from the "souls of dead" so Dynamis is involved to a degree and that was clearly improbable on unsundered aetheris.

Souls are aether. Dynamis is influenced by emotions but is not the actual substance that things are made from.