"No, no, hypersteel you just need a bunch of steel and a dimensional exponentiation chamber. They could've been making hyperseaweed, I guess."

"Ecologically fascinating."

"Not really, it'd just be heavy and very hard to chew but otherwise identical to regular seaweed."

"Only if it was the exact same thing as hypersteel. I don't get the impression these Devisors are all that conceptually limited." 

"Oh, if some Devisor made a seaweed devise for their own purposes then anything could happen, I was just thinking if you put a bunch of seaweed in an exponentiator. But now that you mention it, it would probably have been their own thing."

He considers. "Well, anything that didn't escape and eat Dunwich can't have been that important."

"Do things escape and eat places a lot?"

"No, I was joking. Lab accidents happen, but they're usually pretty minor."

"Ohgood."

Harry shows them around the store. Clothes, toiletries, books, snacks, furniture, personal armaments: all this and more can be theirs.

Clothes! The kind of ridiculously embroidered stuff she liked when she was six and it turns out she still does! Toiletries! Detangler rated for years and years of neglect! Books! Treatises on engineering and social activism history! Snacks! High-calorie high-shelf life stuff to squirrel away for emergencies! ...Personal armaments, tell her more. 

The personal armaments available are mostly different kinds of knife, though there's some swords and a rack of javelins as well. There's a little sign saying that students wishing to purchase a personal firearm will need to present a carry permit, and due to this guns are stored behind the counter.

That's okay, she doesn't give a shit about guns, if she needs small chunks of metal accelerated very fast she can do that with so much more control herself. Anything interesting she can't really do herself in the knives selection or should she turn a corner and probably find a palette of titanium chunks or something. 

There's a couple of very cool knives, but probably nothing she couldn't make with metal and time.

She'll just go for some nice raw materials then. 

Raw materials are certainly available.

Excellent. She feels so much better with some nice titanium alloys secreted away beneath her clothes. 

They can pay at the front, then, and then leave the store.

"Got everything you were looking for?" Harry asks.

"Mhm!"