Those guys are really nasty.Cold fusion?By "barriers", you mean the oni of Hell and the similar sealed youkai?And there are lots of barriers between the reactor and us...Ancient CityPalace of the Earth SpiritsOld Hell is too far underground.Ruins of HellFusion Reactor--cold fusion.It's become necessary to search for a new source of energy.That is--Yes, the underground youkai are a problem.
