So, if you are a white-lighter or if you are in the business of vanquishing demons for any other reason, then this is a piece for you. This piece contains the knowledge of every single demon that ever entered hell and/or has been created by Lucifer. Why is this important? Well, there are a few reasons. First and foremost, it's important to know your enemy. This piece gives you the knowledge and information about any demon you approach, including their weaknesses and how to vanquish them. Also, it will give you the ability to acquire the magic that they have, transcend it to white light, and manifest it into the physical realms. Believe it or not, dark entities have some useful magic they just choose to use it for evil purposes.
The piece you are getting is a costume ring with a black faux pearl.