"How small?"

"As long as the inner circle is less than a foot in diameter it shouldn't work but I'd make the whole thing only a few inches across to be very safe." 

"All right then. Lucy, you ready to pounce?"

Lucy throws off the blanket and gets off the mattress so they won't get hurt if she has to kill an Adumbral Hornet. "Ready!" 

Cam makes a teeny replica circle on paper on the floor.

Nothing appears. 

Wilbur peers at it for almost a minute before making a face. "Yes, I see it. See, there--" he points at a word. "It says 'creator' instead of what it's supposed to, which is 'shadow'." 

"Oh! Well, in many demon languages the word for demon means something more like 'maker'."

"That makes sense, then." 

"Any idea how you mixed those up?"

"They're very similar in that language--Aklo--creator is n'k'til, and shadow is n'katl--if you give me some paper and a pen I can show you." 

Cam hands it over. "It's not likely to matter in the specific, but sure."

He writes them down. The vowels are represented in such a way that it's easy to see how one could write the one as the other by mistake. 

"Okay. The question is can you summon more daeva; and if you can, why hasn't anyone else. It's not hard. I suppose maybe other people have; 'valid daeva-summoning circle' is a conjurable parameter, but is all magic you accomplish locally by drawing on the floor likely to be harmless at small scale?"

"Oh god, no. If you were considering summoning a hornet without someone like Lucy at hand to dispose of it immediately, don't. I didn't even like doing it, but they're not as dangerous as Lucy when she's too hungry to think." 

"I'm indestructible. But yes, I'd like warning before instantiating potentially dual-purpose magic circles that might summon unfriendly critters."

"If you're indestructible and can make arbitrary objects it's probably not a disaster but if you end up with one while on a planet kill it before it can get loose. If you show me a picture of a circle to summon a demon or an angel or a fairy I can tell you whether I think it would be dangerously dual-purpose." 

"I can do that but I'm a little concerned that if summoning is somehow odd here, dismissal may be too. And the only way we could check that before risking stranding somebody here would be to dismiss me and I haven't even eradicated the malarial mosquito yet."

"Eradicated the what?" 

"The mosquitoes that transmit malaria? Do you have malaria on this Earth?"

"Yeah. That's caused by mosquitos?" 

"Parasites they carry, but it's easier to get the mosquito and they aren't an important kind of mosquito."

"That's cool. How do you eradicate them?" 

"I release a bunch of extremely attractive male mosquitoes who cannot reproduce."

Giggle. "And the pretty mosquitos aren't too dumb to fly?" 

"No, bugs and stuff about that intelligence level come out close enough to normal."