Random wild guess: Dumbledore has the Lost Diadem of Rowena Ravenclaw. According to canon, it enhances the wearer's wisdom, and is concealed in Hogwarts (specifically in the Room of Requirement, which either does not exist in this AU or perhaps was kept very secret by Dumledore after he found it).
We already know that Gryffindor's Sword exists in HPMOR and has special powers, and Slytherin's Locket has been alluded to, so it's plausible that Ravenclaw's Diadem is around as well.
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 110.
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.)
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: