While you were preparing the vessel, I sent a group of initiates to retrieve Sangrias Stillblade. You will find him on the top level of Silvermoon's inn with an attendant. Make your way there with all haste and unleash the vessel's magic to restore him to life.
Time is of the essence, <name>. Once he has been dead for too long, not even the Light can bring him back to us. Return to me once you have resurrected Stillblade.