The Vally of Sorrow

From Kingdom Under Fire Wiki

This is the only play where Humans are found alive.However it seems they are creatures of the dark dimension and somehow manage to take the blood out of anything that comes near them as well as comiting suicide.This is also the only place where creatures from bersia can be found....the Ice Maiden.Most are frozen and come out the ground to harm you but one can be found sitting on a throne...

Boss:Ice Maiden.