Re-gifting the Amulet of Benediction

Prerequisites

 * You have to complete The Mystery of the Secret Cabal.

Introduction
I am certain I am getting closer to identifying the secret faction behind the murders of Seeress Ealayna Ithis, Prophet of the Prime Healer, her Acolyte, and the Concordium Pupil Adepts. An important item that was to be protected due its usefulness in the void invasion has fallen into their evil hands. All the clues point to a secret group of elite, noble and eccentric members of different cities being involved, if not behind it all. I need to learn who they are and what they are attempting to gain.