"Uh. Sure? Demonic cows, anyway, why do you want them?"

"For food--what does demonic entail?"

"They won't be very smart, which is really ideal if you're going to eat them. Is this some kind of religion I haven't heard of, don't care for vat meat?"

"...I don't know what that is." 

"...you can't just be completely off the grid, you've obviously had angel work done, where is this?"

He hesitates. 

"Dunwich, Massachusetts." 

"People in Dunwich, Massachusetts have definitely heard of vat meat even if they are Amish and the Amish do not summon demons. I'm confused."

"We share that in common." 

"- okay. Are you urgently hungry right now, should I be getting you lunch before we figure this out?"

"It's not urgent on a scale of minutes." 

"If it's urgent on a scale of hours we can talk while you eat, dude, what do you want?"

"It's not me who's hungry," he says, slowly, seeming to have to force the words out. 

"Okay, who have you got? If we're talking an entire small country it really might take me a while."

"Me," a soft, papery voice says out of seemingly nowhere. 

"I'm more confused now."

A sound like an elephant stomping its foot echoes from a place on the floor not far from right under where the voice came from. "I'm invisible. It's normal. As normal as anything can be, with me. With us." 

"An invisible what?"

"We're both half-human. If there's a word for what our father is more descriptive or scientific than 'god' we haven't found it." 

"Well. You eat cows? Do you care if they're braindead?"

"I used to eat normal food," she says wistfully. "Back when I was small enough that a human-sized meal was more than a morsel. But cows work. Braindead is fine." 

Braindead cow lying on the floor.

A chunk the shape of a giant set of teeth disappears out of it immediately. In five more bites it's gone entirely, save for a puddle of blood, and that disappears too after a few moments. 

"Bon appetit," he says belatedly. "Okay. So this is Massachusetts but it is not the Massachusetts I'm familiar with, do you by any chance have a guess about how to explain to someone who's heard of Massachusetts but doesn't expect anyone to be invisible the inferential gap implied?"

"...I'm tempted to say 'there are more things in Heaven and Earth, Horatio,' but I have no idea what you are or what you meant by angel so perhaps there are simply different things. We don't know everything--Grandfather had books about things shrouded from the common knowledge of mankind, but they're old and in poor repair and in some cases incomplete. We know there are--places, besides Earth, places where things not made of ordinary matter dwell, things like the Hounds of Tindaloo and the Adumbral Hornets--the latter is what I was trying to summon when I got you--or like our father, Yog-Sothoth. We know bits of the language that beings like Yog-Sothoth and its kindred use. We know that Yog-Sothoth and other things like it are bound from fully entering this dimension and if they did it would mean the end of life on Earth as we know it. We know about an ancient civilization that used to dwell at the South Pole before its own created slave-race rose up and destroyed them. We know about an aquatic sapient race that inhabits the oceans to this day, or at least to the day the Necronomicon was written, around the eighth century." 

"...okay. I'm a demon. Angels also exist. So do fairies. All three of us live in our own separate worlds but can be summoned to Earth-as-I've-historically-understood-it by humans drawing on the floor, and then negotiated with for our services. Demons make things, angels change things, fairies move things. Uh, also it's the year 2159."