It has never done anything wrong. In fact, none of the air in the patch has, even when it has been in other patches. It's so innocent.
"I don't think so," she says. "Dinner and a guest room is already much more than I was expecting when I was floating next to the edge of the planet."
"Yeah," she says. "Well, on the moon might not have been so bad, if the moon has down."
"I wasn't sure where I'd end up, so I brought lots of things with me. As long as I can grow Terrarian potted plants there, I would've been... mostly okay. Being stuck in midair with no land and no down is a much bigger problem."
"Terrarian plant pots take care of that part just fine. And I did actually bring a few stacks of dirt, just in case."
"...No," she says. "Uh, a stack of dirt looks like this."
She digs in one of the many pockets of her coat and comes up with a little brown cube, about an inch on a side. It seems plausibly made of compressed dirt.
"It's magic. Terrarian magic. This cube is made of nine hundred and ninety-nine much bigger cubes of dirt; that's why it's called a stack. I'd rather not demonstrate inside the house, though, I think you probably don't want large cubes of dirt in the middle of your floor even if I can clean them up afterward."
Dinner is delicious and non-Terrarian.
Sable is highly enthusiastic about dinner. It contains foods other than all the ones she has had ten years to get sick of, and they're all very tasty.
The letter comes back with a reply written on it!
"Um, my mother says that she'd very much like to visit."