This quest is not available in game.
Kill 8 Rattlecage Skeletons.
You've shown your potential to the Forsaken under normal circumstances <name> - now let's see you under pressure.
The Rattlecage skeletons, more mindless minions of menace, are a tougher foe than the zombies you have faced thus far. Again, thin their numbers and prove yourself to the Forsaken. Do not tarry - when you are done, speak to me again.