I've heard that the Arcanist, Pathfinder's Wizard/Sorcerer Hybrid, has the batspit insane capacity to swap out its prepared spells during the day, effectively making it a Wizard minus their biggest drawback: lack of spontaneity.
However, now that I look over its class features and exploits, I can't identify which feature it is that lets them do this. Which one is it? (Have I heard wrong? Am I thinking of the wrong class?)