Board Thread:Speculation House/@comment-25266931-20161101043944/@comment-25266931-20161101050733

I just rewatched that episode where Cinder, Merc and Em bank Amber. I'm sure it was a Grimm. If they're nothing but black soot that act like animals then maybe they're like a corrupt version of Dust. Maybe that's how they can merge with humans, on hide in gloves, or appear as tatoos. Think about it. What happens when Dust is used up? What if left over residue takes on a form based on the linger energy used in the Dust before it was used up.

We have seen a dragon Grimm able to spawn more. If that's not foreshadowing that they are more like demonic pools I don't know what is. Salem's HQ sit surrounded by pools of the same tar that the dragon dripped. Maybe she doesn't make Grimm, but like Phantomlink said, she can rework them to be woven into clothes and merged with bodies like Dust does. And she can do that because she knows that in truth they are the opposite side of the coin that Dust is on. They're dark Dust. Corrupt Dust. Or maybe Dust waste byproduct.