He laughs for a little while. "Yeah, definitely not that. Not Cheliax, at least. I think the other nations respect exit rights more. For citizens, at least. Do you have slavery in your world? Cheliax is run on the backs of slaves. Indeed, all nations in the Inner Sea have legal slavery save for the River Kingdoms, Andoran, and Absalom.
Well, if I was left to my own devices, I'd use enchantments to ensure loyalty rather than do the whole rigmarole with memory erasure. Conrad dearest was the one that asked me to develop the memory erasure spell, and he asked very nicely. So I did it." His face becomes more neutral. "There are some people who left who I'd rather not have."
"It's not a common spell. Right, I should explain how the circle system works." He glances over at the counter, then looks back at Jenwy. "Magic is based on energy shaped in a particular way. The shape of magic is dependent on the number of 'holes' it has. The more holes, the more energy and complexity it can support, but likewise, the harder it is to prepare. We refer to the 'holes' as 'circles', although they're not exactly circles when you look at them.
Wizards, and indeed, all spellcasters, are sorted based on the highest circle of spell they can cast. This is dependent on their channeling capacity: how much energy they can pour into a spell. Being too weak means that you won't be able to infuse the manifold with energy; being too dumb, in the case of wizards, means that you'll lack the capacity for visualization necessary to keep the entire spellform in your mind. Modify Memory is not only a fourth-circle spell, it is also a bard-only spell, and bards are rarer than wizards."
Then, to Areli, "Tell me about modern Ev. What's it like? I'm surprised all of your nations have the same respect for exit rights. I suppose that's the sort of thing that's feasible when you don't have magic. A ninth-circle wizard like myself can slaughter a battalion a day or more – a world without magic seems like it would have...less power inequality."