I am at a loss.
According to the walkthrough, during chapter 2, you can side with the commoners in the Yhilin mine. I've read through this thread and supposedly there's an elf mage in the slums who gives you the spell needed to open the rift in the mines, but I can't find him. I've spoken with what I believe to be everyone in the slums and completed every quest there, but I still don't know how to proceed.
I tried killing the mage in the mines just to make sure I hadn't already spoken with him, but they simply destroy the rift and then that's that. Who is this elf mage I am supposed to speak with, where can I find him, and what triggers the proper dialogue?