Introduced:  From the Darkness Born Related Quests:  Hidden Entrance Quest
Report to Niarltah

Notes

You give Ydnew Report to Niarltah.
Ydnew tells you, "This will provide us with more information than we currently have. You are to be thanked for your efforts."
Ydnew gives you Guardian's Uniform.
You've earned 1,700,000 experience.