Groaning Bracers  

This quests starts from a mob dropped item in The Wailing Caves, which you examine - Mysterious Bracers.

Mine dropped from an orc ( A Ree Armorer or A Ree Protector - not sure which as there were a bunch of them on me at the time!) in the first box room in the orc stonghold area.

The quests requires you to "...bring these bracers to The Burial Pit ( -170, -60, -10 Copy ) in the Wailing Caves."

Then just fight or run to The Burial Pit and the quest auto updates and completes.