The Teller of Lies is a chaos creature that features prominently in the heroquest Elmal Guards the Stead. It can assume several different forms, including a beautiful woman, a Hermit, the Emperor and others.
It seeks to corrupt people into the worship of chaos by either telling them lies or teaching them how to lie better. Though Elmal is capable of resisting it he realizes that eventually the lies might blind him, so he tricks the Teller of Lies and destroys it from within.
The truth of the matter
The Teller of Lies is a hollow creature, during the heroquest it is usually shown as half a person with the interior being hollow, lined with white cloth. Though slain by Elmal it was resurrected later by mortal fools, and took the name of Gbaji.