Board Thread:Speculation House/@comment-14138255-20141031002615/@comment-24994749-20141101170309

The ancient Grimm probably didn't jump in the opootunity of the wall breach because they probably had been monitoring Mountain Glen since the White Fang settled there and probably gauged the attack was taiking off early. It is also possible they chose to stay behind to see how the younger grimm faired to seize if making the mive was worth it.