Board Thread:General Grimm Discussion/@comment-64.231.120.181-20150211051848/@comment-76.0.18.173-20150213220410

My guess is that the object is the wessen "Holy Grail" (something that can create wessen). Since the Royals used wessen as their foot soldiers, it would be something they would value. And Grimm's being used to keep the wessen in check would see this as a dangerous object.