So gravity points 'down' while simultaneously causing orbits. Or maybe the orbits are done by something different, after all this is a crazy world with only half a moon. Why doesn't anything live on the underside of the world, since apparently the reason isn't "it'll fall off?"
The encyclopedia coughs up a summary of colonization attempts. Apparently nobody wants to live there because looking at an expanse of flat nothingness is depressing and you need to import topsoil to grow anything. No projects have accumulated sufficient stable populations to warrant putting in a teleportation circle.
Well. At this point, it appears that speaking to Keo about her unusual dietary requirements is unlikely to get her killed.
Keo? Have a moment to talk about my species?
Offworld Vampire. Have a moment to drop in? Even if I do have mental powers myself, talking to you in my mind when you're nowhere near me is unsettling.
"Personal teleportation seems awfully convenient."
She pauses. "Though it's possible that nobody here qualifies as 'human' enough for my magic's purposes, in which case we will either need to summon some of my blood-servants from inside my castle or I will be spending most of my time here unconscious."
"There are humans. Saasnil's a human, for instance. I don't know that we'll want to summon people for you while you yourself are still confined to ward but we can send your servants a letter and summon blood they draw for you, if local humans won't do. What kind of quantity on what kind of schedule? Are you hungry now?"
"I'm not hungry currently. Weekly for comfort, monthly for... Not exactly survival, as my local type of vampire I'm immortal unless I die in very specific circumstances, but for me to continue functioning. If I don't eat for much longer than that, I will begin to uncannily resemble a corpse, up until someone with a pulse strays too close to me, at which point we will both regret the situation."
"Yes, likely. Animal blood tastes disgusting to me; I'd expect local blood to taste the same if it doesn't work."
"A cup will do. I'm uncertain why you would need a pressurized container- do local vampires process blood with their stomachs, or is there some biological oddity there?"
Isabella frowns. "Oh, by the way. You should know that being fed upon repeatedly by my kind of vampire comes with health risks. Even if local blood works, I'll want to spread out my feedings across multiple people to minimize that."
"About a month between light feedings is safe; closer than that will cause a loss of sense of self, then amnesia, then loss of intelligence, then intense depression and suicidal tendencies, in that order in ninety-nine point nine nine percent of cases. I stress that these are effects of chronic exposure, and for an acute exposure I would have to actually bite someone, rather than drink drawn blood."
"It... Doesn't taste bad, but that's because it doesn't taste like anything. And it certainly doesn't seem filling."
She takes another cautious sip.
"I doubt I could survive on this, though at least it's not poisoning me. Will you check with Sassnil and make sure that he's not experiencing any unforeseen side-effects?"
"Nothing springs immediately to mind that I haven't already mentioned. If your magic is exceedingly strange she might possibly experience a sudden fondness for me, which would be the result if she had drank my blood, but I don't know of any reason why it would be reversed like that."
"That sounds like a good plan, but is significantly complicated by the fact that said servants are in the interdimensional castle. Since I can survive for at least a few more days without discomfort, I would rather hear what your experimental wizards have to say first before attempting to contact any of them."