Shadow masters are supposed to be (the most?) powerful denizens of the Plane of Probability. One supposedly took some of the most powerful mages of imperial times to take down.
I sure would like to know if I can at least make the second-strongest thing and have it romp around causing trouble. Embarrassing to get annoyed enough to use them and have it just be a glorified devourer standing around doing nothing. Already have too many things that do that.
But I don't want to waste pearls just to find out...