The Coldfall Sanction
Romanian legends claim that the Scholomance is where the Devil himself instructs worthies in the deepest secrets of the occult. The Prince of Darkness isn’t charitable, though, and for every ten he teaches, one must remain as his slave. Yet the nine who survive the training emerge as Solomonars (collectively, the Solomonari), beings more than human who boast mastery over the laws of nature and reality’s deeper mysteries.
Romania remains the seat of Solomonari power, perhaps due to some tie to the Scholomance. The only clue to its location is that it is near Lake Hermannstadt, but alas upon no map is the lake to be found.