Master of the Phantasms - he is the last one you will seek out. Hmm...Polzin is native to Erudin, however, after the
incident near Paineel, no one has heard from him. I hope that he is well.
My rogue was scouting the hole for an up coming raid and saw him casting. The casting was seen as you move through the corner of the castle heading to the tunnel leading to the city itself.