" - 'do it all day' is the obvious thing? You know the durations on illusion spells, they're not impressive, and Conspiracy didn't plan spells this morning with you trying this in mind. And make people show you things that would be hard to illusion well, like all the dock laborers in Ostenso, or the central market, or the temples, where there's a lot of stuff going on and you'd need a very good visual in order to fake it at all. I have all kinds of clever ideas around using necromancy to possess a person who's going to Ostenso, or binding a familiar and using spells to look through their eyes, but none of that's magic you're already familiar with -
High Priest, could we convince Her Majesty to visit Ostenso, with Keltham under a bunch of heavy duty antiscrying and nondetection among her entourage? That happens sometimes, so it's not by itself likely to trigger attacks by any dragons or fae or hibernating liches or whatever, and you don't have to double up the security between Her Majesty visiting and Keltham visiting, and even if people are hanging around in Ostenso desperately trying to learn about Project Lawful, which I'm sure they are, they won't learn much from a royal visit since again those happen sometimes. It'd mean Keltham couldn't go around confronting random people, which is too bad because that'd be very good at differentiating Conspiracy and not, but he could at least - see that Ostenso exists and is at the right tech level and wealth level and has thousands of people around who look like the Ostenso wizarding students do -"