This quest is not available in game.
You have been tasked to go to Tempest Keep's Arcatraz satellite and slay Harbinger Skyriss. Return to A'dal at the Terrace of Light in Shattrath City after you have done so.
- Kill Harbinger Skyriss
<A discordant note can be detected in A'dal's 'voice'.>
Prince Kael'thas has chosen his warden poorly, and now the entities that we kept locked up within the Arcatraz are breaking free.
One in particular, a servant of the Old Gods known as Harbinger Skyriss, seeks to usher in his masters' vision of conquering all of the worlds in the universe.
<name>, you must not allow him to escape. Return to Tempest Keep, enter the Arcatraz, and slay Harbinger Skyriss before it is too late!