Speak with Nathanos Blightcaller in the Eastern Plaguelands. He is said to have taken up residence at the Marris Stead.
It pleases me greatly to see the battle hardened join our cause. Our numbers grow in size and strength as each day passes. Perhaps you are prepared to test your mettle, [class]?
Among the first of my champions was Nathanos, now known as the Blightcaller. Few exist with more dedication or vigor amidst our ranks.
Seek him out in the Eastern Plaguelands. He resides at the Marris Stead; occasionally roaming the decimated wastes, slaying all Scourge and Alliance filth that cross his path.