Chor Bryllyn

Summary
Chor Bryllyn is the primary antagonist of the Lightfall campaign. From the shadows, he's directed a series of attacks on the Locks, and kept his influence as hidden as possible. It's only recently that the Third Party has come into direct combat with him, as he possessed the form of the resurrected ancient dragon Deathwing.

Chor Bryllyn was eventually revealed to be none other than Eleanor.