This quest is not available in game.
Speak with Shadowmaster Vivian Lagrave in Kargath.
Shadowmaster Vivian Lagrave is in need of your services. She is in the Badlands, in the orcish outpost of Kargath, pursuing rumors of a certain brew made by the Dark Iron dwarves of Blackrock Depths.
Speak with Vivian. She awaits you.