The region is, possibly, worse than described - the entire mass of spiky brambles seemed to be almost alive, pulsing and twisting and writhing, as it expands and grows, and the ground itself seems to cry in pain as the vines grow at a visible rate, bursting forth in every direction. Flying above the mass doesn't show any obvious threats, but with the fifteen-foot-high brambles growing everywhere, an army could be hidden inside and be entirely unseen, especially with how actively it seemed to be moving, making it hard to discern plants from living creatures. Not that they saw any living creatures among the mass - entire flocks of birds were skewered and torn apart by the thorns, from what they could see.