"Lots of varied and creative ways of doing lethal or nonlethal harm to things, making things, moving things, transfiguring things, divination but it's unreliable, potions, Apparation - huh, I could check if I can Apparate here, if I can that'd suggest it's not in Hogwarts - which the computer maybe suggests anyway -"

"What is Apparition, what sorts of things do potions do, how unreliable, how does the computer suggest that?"

"A few years ago some Muggle scientists came up with this idea called voltaic piles, they work with metal, that's about all I know but my father thought it was a big deal and immediately replicated it and when my little brother was trying to do the same he discovered that whatever physical principles makes voltaic piles possible, it doesn't work within Hogwarts because of the protections laid on the school thousands of years ago. It stands to reason that complicated future Muggle technology is at least fairly likely to stop working in Hogwarts, and it worked fine. Apparition is -" he twists in place and disappears, reappears across the room with a pop. "Potions can make you look like someone else, heal things, shrink things, induce or cure a variety of conditions, let you breathe underwater..."

"...what's the range limit on Apparition?"

"Depends how good you are and how tired you want to be and if you're taking people along but very few people can jump the ocean."

"Ah, damn."

"Where would you want it to go -"

"It wouldn't help with the dead people - well, probably, they're immaterial by default and if teleportation is possible in principle maybe they could be extracted and be just fine? Not sure - but it'd speed up interplanetary travel, if it reached that far which it doesn't."

"Interplanetary -"

"The other you's dad invented faster than light travel."

"I feel like I do not know enough things to appreciate how this is remarkable."

"On my Earth, that has not been invented yet as of 2179. Although there are colonies on the Moon and Mars."

"Ah. Cool. - if a werewolf lived on the Moon - no, you said you don't have any -"

"We do not." He approaches a barstool, apparently having decided that the conversation is going to continue long enough to warrant sitting down. A napkin appears and he blinks at it.

"I didn't get one -" He lifts up his rune charts - "oh, wait, yes, I did, and I didn't see it - oh, sorry, Bar, nice to meet you -"

It's quite all right.

"Are we intruding? What is this place -"

It's called Milliways and you are quite welcome.

"How'd you land on us in particular? Do you know anything about the tall singing Elf who looks like me?"

The door's whereabouts are quite outside my control and I don't believe I'm acquainted with your alt aforementioned.

"All right. I'll have a butterbeer."

Butterbeer appears!

"What an... evocative name for a beverage," says Cam. "I am sort of outside the market for free drinks."

I would be happy to recommend something unfamiliar.

"Okay."

He receives something unfamiliar and evidently likes it.