Talk:The Relic's Emanation
From the research I have looked up you must complete 4 group quests before the Ogre Heaven quest opens up.
Grulloc Has Two Skulls
Maggoc's Treasure Chest
Even Gronn Have Standards
Once these three are completed, he offers a forth 5-man quest: Grim(oire) Business
Can't see a reference to this anywhere, but this quest seems to based on the popular 1980s electronic game, Simon.