Board Thread:Speculation House/@comment-14138255-20160103163552/@comment-14909251-20160105190835

Sentry 616 wrote: I'm not sure that there was a single specific ground zero since Grimm cover most of Remnant. I also think that some of the Grimm on that continent have never seen a human, but the CCTS WOR episode showed  support towers there. Who knows? For now we're taking shots in the dark. Presumably, they would have spread out from the Black Dragon continent. Remember that it was only after the discovery of Dust that humanity were able to truly drive away the Grimm. Until then they would have been pressured at every step. The darkest areas outside the Black Dragon continent are on the continent where Vale and Vacuo are located, which is the closest continent and the one where the Grimm would most likely have spread first.