"It's not that precise. You need a circle that is more circular than it is anything else, and I recommend completing that part last. And around the circle you write what you want to get and how they're bound, in whatever language, English works fine. The one I described to my parents will work to summon me, specifically, but if you aren't acquainted with a specific daeva -" Cam gestures at Max's notebook. "There, generic standard-binding circles for whichever daeva types. And safety instructions, do not unbind random daeva you do not know, do not make stupid deals with them."