(Apologies for auto corrects. On tablet since my laptop broke)

I could flex things around with the undead. Undead that existed before the curse would not be controlled by it. Also Vivian developed a ritual to bring free willed undead as generals. Main thing you have to worry about is much of the play may take place in civilized areas and the town guard is not going to give much thought before attacking undead under most situations

Some mages do exist still among humans. As long as the proper wards are maintained they can keep the curse from affecting them. Heavily magical races have their magical aability weakened. However, the art of enchanted weaponry has progressed rapidly via the now magicless races. Wands, artifacts, sspellcasting equipment, and such things are much more common now.

Divine magic I suppose would be unaffected as it would probably work against the curse if stolen by it. However the curse would probably weaken all holy type magic. Think of it as a radiation field of dark magic.

Lastly, non humanoid races are encouraged. Dragons included of course.