continuing on the Sylph of Void talk... could they make a really powerful item disappear and then reappear somewhere else? like say... the black king's scepter? the black queen's ring? beat the dersite royalty without even having to battle them?

I would assume a their ability to make something disappear would have a limited range, which is to say, they’d likely have to engage the Black King regardless to Void that Scepter out in the first place.