Board Thread:Speculation House/@comment-26025032-20151124005729/@comment-25396609-20151130001851

created by a semblance (which is a part of aura) means they are constructs of aura, meaning they would have aura inside them. The fact they do not rules out connection to aura.

They cannot exclusively summon grimm, any enemy i think is fair game as long as they killed it.