The patronus can be willed to take the form of a sphere
It can? I don't remember that. But if true, can it be willed to take the form of a sphere around Harry, thereby providing a perfect anti-Killing Curse shield?
The patronus is willed to take the form of a sphere when Harry leads the Aurors to rescue Draco. And, yes, it might protect from AKs and from Voldie, but the Death Eaters have been instructed to attack Harry with a wide variety of curses.
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: