Board Thread:Speculation House/@comment-3146930-20140928173849/@comment-24901923-20140928193002

That certainly seems plausible. The collection of Dust likely involves several reasons. To cause panic among the population, to cripple Vale's ability to defend itself, to arm WF, and provide it with a means of breaching the kingdom's walls to let the Grimm in. The build-up of Grimm in the South-East is likely as much to gather more to assault the city as it is to provide camouflage, since they would keep away intruders and few would probably suspect the presence of a base in such a Grimm-saturated area. The extra Dust could also be so that WF can defend itself against the Grimm if their control over them wavers, etc.