I believe your concern is relegated solely to Lucius Malfoy and Bellatrix Lestrange. Suffice to say, if Mozenrath's creation was useful against me, it will be useful against them. Your hand-to-hand combat abilities should carry you the rest of the way.

In other words, I do not know how it works. I know only that it works.

I can speak to the weaknesses of my old colleagues, but it would take some time for consideration.