Crown of Fangs
The Crown of Fangs is made from the four surviving teeth of the blue dragon Kazavon. They house a part of his black soul, which was able to influence a young, petty, cruel queen on a subconscious level. The crown gives the wearer a variety of powers, but by far the greatest is virtual immortality. The only way to truly harm the wearer is with the sword Serithtiel.
After Ileosa’s defeat, the fangs were given to an azata in Sarenrae’s service to hide.