This quest is not available in game.
Kill 8 Razorfen Battleguard, 8 Razorfen Thornweavers, and 8 Death's Head Cultists and return to Myriam Moonsinger near the entrance to Razorfen Downs.
The Forsaken do not pass on their... illness... from what I have seen. This diplomat seems to be granting undeath to would-be followers. I am beginning to think he is one of the Scourge.
For now, my concern is not with him though, it's with the growing ranks around him. They creep from the shadows daily, almost begging him for more power.
I'm not powerful enough to fight them on my own, <name>. What do you say? Are you up for some hunting?