There's a particular Circle mage I've been tracking for many years. Every time I'm near catching him, he gives me the slip. I want to see if you can succeed where I have failed, Dread Tomax. Bring me the cloak of the mage Selestar, and we will continue to do business. If you can't, perhaps you should seek out lesser challenges.
Though he is a vile and corrupt member of the Circle of Thorns, I cannot help but respect Selestar's intelligence. Be wary of him, Dread Tomax.
It sounds as though Zuhkara's beef with this mage is personal.
Mission Complete: You defeated Selestar!
After defeating Selestar, you took his cloak as Mage Killer Zuhkara requested. Along the way, you've learned a few interesting things about your contact. It seems she was once involved with the Circle mage. Perhaps this explains her hatred of all things magical. More importantly, it's a fact you may be able to blackmail her with in the future.
Awarded for completing the mission
So. It is done. To be honest, I thought I would feel more. Happiness, maybe. Or peace? But there's none of that. All I feel is the same burning determination to wipe out all of Selestar's putrid kind. And that's just what I'm going to do.