These guys drop ethereal parchments, diamonds of different kinds, not sure if they drop other stuff. The dropped some strange items that may be quest related as well. I forget the name but one was a scroll of some type, sorry I should have come to this page closer to the time when we killed them. They can be mezzed with Rapture by the way, though GoK will most definitely NOT take, no matter how much you tash or Malosi them. You get a message back that this creature is too powerful for this spell to effect. Fun for a group of high 50's. they are in the upper levels in the building where the mages stand outside the door. They typically come in two's so be prepared to deal with 2. Enchanter with Rapture not necessarily a must, but gonna be a much easier time with one.