- Enter the green portal near Mer-Kil
You are given this quest once you enter Carnach's lair, so it's one of the simplest quests. Locate Carnach in the big cave, and kill him.
Once you've finished him off, return to Mer-Kil (follow the green arrows backwards):
Mer-Kil keeps his promise and tells you where to find some answers about the Great Machine:
This portal leads to the territories north of the southern ocean. Go through the portal and find the Family Grackk.
It is done then... so mote it be. The answers to your questions can be found in the High Temple of the Lost City. Once this was the capital of the ancient Elven realm, but now it's deserted and has been swallowed by the jungle in the southlands. It's quite far away, but I can make your trip a bit shorter. Go
through this portal, it leads to the lands north of the southern sea. When you arrive, find the hearth of the family Grackk.
One such as you will be welcome there.
He even offers you an easier way to get there. Enter the green portal near him, which will take you to the swamplands and to new adventures.