Arkinslize
What are the chances that the "Wilderths" that his master has shown him as the strongest bloodline are just him and his people after living in a neutron star for a while? It would technically have everything from radiation to metal considering that their gravitational field keeps pulling asteroids/planets/planetoids to it, and considering only the strongest substances wouldn't burn up from the heat and pressure of the surface it's basically a 5 star buffet powergrind for Kintharians at it's core.
As an Aetherist can't Jake just create the miraculous and unique materials his body needs to evolve? I mean if he finds a metal/soil that would be highly beneficial to his Bloodline can't he just carve Aetheric Runes into the materials and absorb them to gain those properties and abilities while allowing them to grow with him? Unlike the skills associated with the oracle store or Rune stones from a dungeon, whatever miraculous property he imbues into the material before assimilating it will become entwined with the Runes governing his Bloodline. It's OP but feels earned ¯\_(ツ)_/¯. Thanks for the chap!