Say, what are the limits on ofuda talismans and how exactly will they work? Like, I imagine they'll only have a single use and there's a limit on how many you can carry on you, but additionally, what about things like summoning and fireballs? Can you have/(eventually) tame/summon a familiar? If you have a familiar, can you do something along the lines of letting it "possess" you, letting you draw on its power? Can ofuda be used to make fireballs and shoot them or would they be limited to combustion effects on whatever person/object they're applied to?