Gothic/Aid of the Magicians of Fire

You get this quest from Saturas before Banishment from the Old Camp. You will start this quest after delivering all the Focus Stones to Saturas.

With all five Focus Stones and the Almanac, Saturas is prepared to blow the ore mound and destroy the ore mound, but he needs the help of the Magicians of Fire. You are asked to go to the Old Camp and try and get the Fire Magicians on their side. He'll tell you to talk to Corristo, leader of the Mages of Fire, and attempt to convince them to contribute to the efforts of the water mages. He'll give you a teleport rune that will teleport the user to his chamber to give to Corristo, as a sign of Saturas's trust.

This quest is padded with journal entries that involve learning more about the collapse of the Old Mine, the securing of the Old Camp's gates, the murdering of the Magicians of Fire, and how Gomez plans to raid the Free Mine, and so forth. You will learn about these topics from Milton and Diego, respectively watching the North and South gates of the Old Camp.

When you report back to Saturas, the quest ends with a completion, even though you've delivered nothing, though your banishment from the Old Camp quest will continue for some time...

Additionally, with the information you learn from Diego - initiating The Meeting - you can tell Lester about the murder of the Magicians of Fire.