Transfer something into non-toxic gas, wait for everyone to inhale it, then dispel the transfiguration. It's faster.
Great idea! When everyone has inhaled the gas Harry can truthfully say in parseltongue that if he dies, everyone present will die (because that would cancel the transfiguration).
Edit: This work well with all the early foreshadowing about how transfiguration is extremely dangerous. In Ghostbusters we establish early on that you're not supposed to cross the streams because that is extremely dangerous. And then, at the end of the move, when all is lost, what you do is to deliberately cross the streams.
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 113.
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.)
IMPORTANT -- From the end of chapter 113: