"I don't think you know enough to reconstruct the tech in less than, like, two hundred years, at minimum. Besides, anything having to do with brains is extremely expensive, that spell I used to make us forget was ridiculous and we can't just spend that sort of mana all willy nilly even with what Sadde gave us. I have three goals here, roughly in decreasing order of importance: to make sorcery a force for good in the world instead of a tool of oppression, to ensure phe Bez won't do whatever it is he's planning to do which required him to ensorcel us, and to prevent the political disaster that would be caused if anything happened to him that couldn't be properly explained and might be connected to us." Pause. "Time. Temperance, can you go to him, give him back his ring, get him to forget the interaction with you and act as if everything's alright, but be compelled to come here by the time he'd retire for the night? We're gambling about how long he can be missed for and I don't like our odds."