Due to the vast territories and extraordinary strength of advanced monsters, if they were to be let loose, they could easily conquer the territories of the middle-level monster groups in just a few days.
A Lord's realm, at most, is only about the size of a hundred territories of these advanced monsters. If an advanced monster is left unchecked, its expansion could greatly diminish the overall strength of the Lord whose territory is being infringed upon.
Thus, to prevent their own strengths from being weakened due to the struggles of these advanced monsters, Lords have already put corresponding control measures in place.
