Malreen Devahr: Ben

A being living in a necklace that is known as the posseser of knowledge. He convinces the person using the necklace he lives in desires knowledge and the mere lack of knowing something harms the person.
  The necklace has the following mechanics you can ask Ben about anything in the past and he will tell you truthuly what he knows about it to the best of his knowledge. You will also gain an obseccion in a certain area or topic, anytime you are able to learn about something within that topic you take 1d6 psychic damage for resisting.
  The necklace is currently lost and no one knows where it is.
  Ben was a informant for a variety of powerful beings including the god of undeath, the lich in the lich blade, a devil named Zameril, the white mage (he betrayed her), as well as many powerful adventurers most of whom are dead or betrayed by Malreen Devahr.