Aicath is a Shadar-Kai we encountered in the Shadowfell while on a diplomatic mission for the House of Time. Aicath agreed to leave the Shadowfell and present himself to the Magistery as a Candidate for Initiation, He also agreed to bring with him The Book of Whispers, his remembered knowledge of how Shadar-Kai rogues channel the use of power from the Plane of Shadow.