[@Klomster] Thanks for the attempt, but it should be noted that the biggest problem with Urgrugg's arm is not that it was cut off. The major problem is that it currently looks mummified... and probably smells like charred raccoon.

Oh, and you may want to be careful with that gem. Null fields disconnect the area they cover from the warp (to a greater or lesser extent), they don't remove already existing warp energy. That's how demons and wraith-constructs are able to engage sisters of silence and the like. So, the reserve of raw warp energy Urgrugg keeps in his staff is still safely tucked away in it, just waiting to jump out and bite something.