As titled, this is a suggestion to add in an item along the lines of the Dusts of Disappearance/Appearance, only to have the purpose of being a mundane alternative to Lesser Spell Breach wands. Currently as a mundane character without wand access there isn't really an equivalent to lesser breach available, and as it's something of a necessity in many boss fights, this would make pure mundie life a little bit easier.
I imagine this could fall into alchemy pretty easily.
(I'm aware there are scrolls, but they cost like 750g each which is just punishing for something that already has high costs.)