This is troubling news, $p. Whoever this "Banished One" may be, it is clear he is behind the Scourge's return.
That the undead are amassing in great numbers outside Icecrown Citadel cannot be a coincidence. Lead our hippogryph riders in surveying the area from above.
Determine if the dark herald you saw is among them, and then clear a path for reinforcements.
Let us hope she possesses the answers we seek.