Again: Demons. Demons are born of fel. Their abilities IN GAME being shadow does not make it true.
Which is kind of the point of the complaints???
There is no way to get evidence for something NOT Doing something. It either does it, or it doesn't - I can prove if it does, but if it doesn't, all I can do is sit and wait until you accept that it won't do it.
My warlock tried to use his shadows to turn invisible, but failed. I guess that must be proof enough for you?
You're correct here.
"Shadow based demons" don't exist. We have Voidwalkers, confirmed to be Void creatures - Succubus, fel creatures - Imps, fel creatures - Felguards, fel creatures - Doomguards, fel creatures - Need I go on?
As can vanishing powder - Turns out, herbs have a lot of effects, especially when combined with OTHER herbs!
I don't see any reason to believe it should.