The Brotherhood is heading south, and their first choice will surely be to annihilate Yuntian Palace. This isn't because of any past grievances with Yuntian Palace, but because that's just how the Brotherhood operates. Their existence will scorch the earth, leaving no grass where they tread.
The Brotherhood must head south, because to the west or north are desolate areas, and only by heading south can they fulfill their doctrine of ending all suffering.
"Yuntian Palace is at a critical juncture, how can it resist the ferocity of the Brotherhood? Even at its peak, Yuntian Palace may not be able to withstand the Brotherhood now."
