"So, I don't want to go around telling everyone I summon about plans to publicize summoning. But... you don't know, specifically- can you be sure that there isn't some way you could have been spied on regardless of whether you told anyone? The types of magic... there's parlor tricks, summoning, and the native magic of daeva, but none of those seem like natural kinds. Are there... any other types of magic to worry about, or is it well-established that those are the only tools available?"