Board Thread:Speculation House/@comment-25051723-20140708033229

Things powered by Dust glow, correct?

Guess what else glows? That's right, the Grimm's masks and the masks we've seen on Faunus/Humans.

My personal theory as to the origin of the Grimm is that Dust is a sort of parasitic lifeform that can grow with repeated and frequent use/exposure. Thus, the species around Dust deposits become altered into Grimm powered by dust.

SDC only reveals more and more Dust deposits, compounding the problem more and more.  