If Harry needed his wand to demonstrate something (which he very plausibly might have), it would have made no sense to take it away.
So have him drop it and a Death Eater confiscate it, and if he says he needs it to demonstrate something, Voldemort can ask "do you plan to usse it to attack me, sservantss, or to esscape?" before returning it to him. Then as soon as he's done, confiscate it again. That's an extra 10 seconds; which is a small price to pay to hedge against a Black Swan.
Voldemort doesn't know about Partial Transfiguration, but he does know Harry has powers he knows not, which is what this entire charade was about in the first place! I would've done it it just in case.
There's an easy way out of that one: Harry should precommit to not begin thinking of any possible plans of escape using his wand until after getting it back.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 117.
Plans for next chapter release:
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)