Tristys is a brass dragon who has taken up residence by Kiris Dahn’s hot springs. In its investigations of the town’s library, it found a fell artifact known as the Slaying Stone, the last of a set of items made for the town’s defense.

Bosabrieln, Emma, Peren, and Torinn convinced her to give them the Slaying Stone, though it seemed as though she gave it to them largely so that they would let her alone.

Image retrieved from http://forgottenrealms.wikia.com/wiki/Brass_dragon on November 15, 2011.