Necro Overlord Mezhen

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.