Speak to Haijakt at Everstorm Bay. He is on the beach at the evac/respawn point at ( 215, 0, 50 ) /waypoint 215, 0, 50
Enter the Forbidden Sepulcher using the door at the northwest corner of Jagged Plains. ( 138, 21, -659 ) /waypoint 137.62, 21.29, -658.96
Slay Countess Satrinah (level 42). She is spawned by killing the Disciple of Satrinah and nearby prophetesses (level 41) in the last chamber of the instance.
Return to Haijakt, on the beach at ( 215, 0, 50 ) /waypoint 215, 0, 50, to complete the quest and choose your reward.