User blog comment:Varzan Deodinm Beldinm/Search and Destroy: Ooh, Oobleck you're Amazing!/@comment-10380701-20141003002012/@comment-10380701-20141003002719

My new theory is that the original Grimm has already penetrated humanity's defenses and is already chilling with them.

We just don't know where.

You know, how like Cinder managed to sneak through Beacon and no one bats an eyelid.