Ravenfell is a fortress in the mountains made of stone and black crystal. It was created by unknown means by the Overlord Radja, and boosts the power of the Overlord who has mastered it. Beneath the fortress is a magical maze set to confuse intruders and lead them into deadly traps, or send them to the center pool to be dealt with personally by the Overlord. Some say that Ravenfell has a sentience of its own.