"Coooool. Okay, so yeah, as long as there's uniquely defined sufficient space in your domain - does it not have a name besides 'your domain'? - then the caster will be able to aim the scry that handles that end's reactivity in just fine. The spell will technically all be located in and working from Elcenia; wizardry doesn't play nice in other worlds."
"The two levels have been nicknamed Downside and Upside respectively, but my domain as a whole is nameless. Is wizardry the type of magic related to the numeric quantity attached to Elcenians?"
She grins.
"It is possible that I could," she says. "But the numeric quantity is associated with an entity whose minimum lifespan equates to that of this universe, and I cannot communicate with it directly or predict its reaction if it notices the numbers changing."
"I can perceive that it has a mind which makes decisions, but not very much more beyond that."
"They're this ridiculous little cult that took some specious, methodologically laughable research suggesting that the reservoir was sentient and concluded that they ought to worship it," says Kaylo, sounding like he's talking from under seven hundred pounds of weapons-grade exasperation. "I might have to actually talk to one in order to get ahold of some of their 'prayer spells' in order to let you talk to it. Although I think their best spells only convince it to give you weird colors and stuff."
"It occurs to me," she says after a moment, "that unlike most species, yours has no natural settling point for the aging process. It seems potentially convenient to make the young dead able to age normally, but at what point should they stop? I assume it would not be convenient if they continued growing indefinitely."
"Uh, yeah, that would get really inconvenient after a few more thousand years. I guess we should stop no later than four thousand years. Never having exceeded twenty feet nose to tail myself I'm not sure if it should be earlier than that given the choice... could ask Mom and Dad after I fetch them, though."
"Yeah. Like, at minimum, the buildings on Dragon Island can handle people that big and I am pretty sure they can still do midair shifting to escape from closed-in architecture. Man, various religions are going to freak out about this entire thing. The Sand Dusk Chanters will be smug and everybody else will be running around in circles like the moon's falling out of the sky."
"That sounds... noisy. I hope that no one decides to address their complaints to me. I dislike complaints."
"I would expect them to pile up in great intractable drifts everywhere. I'm not actually sure why I was able to get in this room - I suppose Korulen and whoever she was living with moved completely out of it and you're here for long-term enough that you count as the occupant, now? Well, the door has a ward and if it thinks you live here it'll respond to you circle or no, you don't have to let shouting Thanetans and singing Aleists and outraged Kovin and - reservoir knows what else. Chanters are going to be so smug."
"Are shouting and singing common respective behaviours of Thanetans and Aleists, or was that arrangement of phrasings rhetorical?"
"I see. I will be pleased if none of these people succeed in complaining to me about the implications of my existence."