They are evil : during a war, they usually put some pieces of fire around the castle until it is only possible to walk there by knowing the position of them and avoiding them. Otherwise, the whole place really is a deadly trap.

     Please be careful. First, move toward the girl slowly. Yes, very slowly. Please be careful. If you want to survive, you have to burn the rope before the entities score two eruptions. When the first of them erupts, the last one erupts too, but there is only one eruption.