Found two imperious crystalline spheres tonight in the Shining City. One was at 1244, 1064, 164. The second was not far east of Yedrin Ironbender, at 1247, 1236, 76. Note: that second one was in a group with a distrustful guard, a surly worker, and a supercilious worker, and the distrustful guard blocked it from view until I was practically past it.