.. sigh the point is survival. A radiation pulse will hurt Harry the most, and will not be immediately obvious to people not fried by it. The idea is to disable opposition and summon help.
In the event no help instantly materializes, dodge and start the incantation for fiendfire - it doesn't actually matter if you can't cast it. Everyone present will recognize it, and to a blinded wizard, fleeing should be utterly reflexive at that point.
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: