This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Bring a Skin of Shadow, 3 Frayed Abomination Stitchings and 1 Twilight Cultist Robe to Aurel Goldleaf at Cenarion Hold in Silithus. You must also bring Logistics Task Briefing XI in order to complete this quest.
The Twilight's Hammer operates through innumerable layers of secrecy and deceit. While their actions are carried out in our world, they are planned in a place we have not yet been able to reach.
We've come to believe that the stones the Twilight's Hammer uses to summon their superiors allow for two-way transportation. To attempt to use them in this manner, we must replicate - to every last detail - a twilight emissary's robe.
Gather the necessary materials and bring them to Aurel Goldleaf, <name>.