The Twisted Door is an ancient set of bronze double doors at the foot of the cliff below the Varisian city of Kaer Maga. Some believe that it was constructed by the same unknown race that built the city.
The doors are covered in strange runes in an unknown language. They also exhibit a strange optical phenomenon. The doors' edges appear perfectly straight, but an observer who follows an edge with his eyes somehow finds that was once an outside edge is now an inside edge. It is this effect that gives the door its name.
Scholars are keen to study this effect, much to the irritation of the Duskwardens. The Door serves as the entry to the Halflight Path, and the sages interfere with the passage of the travellers the Duskwardens guide along the route.