This quest is not available in game.
Give Deliana your Shadowcraft Cap and Shadowcraft Tunic.
That's an amazing story, <name>! You have my thanks, and the heartfelt gratitude of all who were involved. Now maybe I'll be able to sleep at night with both eyes shut.
As to your reward, I believe I have a few things that you'll really enjoy.
You will receive:
|Darkmantle Cap||Darkmantle Tunic|
You will also receive:
- 2,365 experience
- 14 40 (if completed at level 110)