Kill Necro Overlord Mezhen. Then, return to Captain Adams at Westguard Keep.
The Scourge are at Gjalerbron and they have necromancers with them! They must be working to bring the vrykul into Arthas' fold.
I want the leader of these necrolords eliminated!
Do whatever it takes, <name>, but see to it that Necro Overlord Mezhen, and whatever he's attempting to accomplish, is neutralized.
I will not see the vrykul successfully allied with the Scourge!
Look for Mezhen on the platform in the rear right section of Gjalerbron.