On the primal bits a few posts back, the Scions, even if they had the power to summon primals, would not want to summon them unless they want to screw up the world's aether. Remember, primals consume a ton of aether just to sustain themselves (and Gardua wanted to have a freaking buffet of aether just cause) and unless I am missing something, there doesn't seem to be a way to send a primal back other than beating the crap out of it, so I don't primals would be happy if we summoned them then gave them a beat down.


There's also no current way of allowing primals to roam free without them consuming aether.