Arx Fatalis/Greu's Birthday

You can first pick this quest up during your escape. In the goblin dungeon on Level 3, head to the room with two big double doors. You can pick the lock or get the key from the goblin lord's bedroom. Head into the cavern beyond and you will find a troll named Greu. He will either be down by the lake fishing or standing around in his cave. There is also a portal here, which you can activate if you have the Mega and Spacium runes.

Greu left the mines to seek a quieter life. He is very lonely because he has no friends out here. Today is his birthday; after Am Shaegar suggests he could be his friend, Greu asks him to get him a birthday present. His old friend Burwaka might know what you should get him.

To proceed with this quest any further you will need to complete The Troll Strike. When you have done so, head to Level 3 and go deep into the troll mines, taking paths leading north whenever you get the chance. The mining area you are looking for is at the very top of the map and is decorated with goblin art like Greu's. Greu's friend Burwaka will be here as long as the trolls are no longer on strike. Burwaka tells you that Greu was born underground and so would probably like a book with pictures showing what the outside world was like. Head to Arx and visit the castle library. Talk to Sister Chinkashh and she will give you the book Landscapes of the Outside World.

Head back to Greu and give him the book (activate it in your inventory, then use it on him). He is delighted by your gift and decides to give you one in return: a Troll Amulet. This amulet makes all trolls you meet friendly towards you; without it some of them will attack you on sight. Completing this quest earns you 5000 experience.