Board Thread:Spoilers!/@comment-1916997-20150313202428/@comment-4453062-20150506044806

In regards to the AU, my theory is that the past won't technically be altered, but just everyone's memories and personalities will. It's the simplest explanation and one that would make sense without worrying about the timeline. It would also go in line with the Laws of Magic (You can't change the past, bring back the dead, and make someone fall in love with you). Yes I know they've broken those rules before, though I'd argue most of the resurrections have had logical loopholes. Though that still begs the question if the Author has the power to break the laws of magic.