The Protectors had cast powerful magic to seal away portions of Zeme from the eyes of the mortals that dwell there. The power to return them to the world lies in key-like totems that the Protectors had hidden in remote locations. Knowledge of these totems has passed from secrets to rumors, and on to legend and myth over the ages.
Why the Protectors had done this remains a mystery. Did something terrible happen in these locations? Did they contain power that was deemed too much for the mortal races?
Know one knows for sure. There are historians that study the legends of the Protectors and seek to unlock the mystery of these hidden totems, but their numbers are dwindling.