Amethyst Dragon
Contradictory tales told throughout the Forgotten Realms are unclear about whether or not the ancient amethyst dragon Eldenser still lives, largely because of the behavior that earned him the epithets “the Lurker” and “the Worm Who Hides in Blades.” Obsessed with observing the world and its creatures, Eldenser developed magic that allows his mind to inhabit the blade of a weapon after his death. He exists now as a draconic shard (described in chapter 6).
Eldenser prefers the role of silent observer to doing anything that might give away his presence. In this fashion, he has inhabited countless weapons over long years, including many belonging to famous adventurers whose exploits the dragon has seen firsthand.
