With the changes to the Spirit Talker feat as part of the ACG errata, how does the feat interact with the Arcane Enlightenment hex? Do spells prepared with the aid of that hex vanish at the end of the hour, or remain prepared?
Prepared spells don't tend to disappear once memorized.
I'd say they stick around. You wouldn't be able to memorize them again unless you used Arcane Enlightenment again, but until you cast them they are in your head.