Order: Find the ancient treasure that Derot has been searching for.
Step 2. Knock on TombstoneA broken and neglected headstone in the Ishalgen Prison Camp's graveyard.s and kill the ghosts who appear. After you've found the right grave, bring the treasure to Derot. (You need to collect: Charmed Cube)
Step 3. Take the Charmed CubeA cube carried by the ghost in the Ishalgen Prison. It's supposed to be quite an expensive item. to MuninA prescient Daeva, now imprisoned in a crystal at the The Forsaken Hollow. He was exiled after some sort of accusations in Pandaemonium..
Step 5. Talk with Munin.
Step 6. Talk with Derot.