"Suppose that, like most people, you would prefer not to die. In my world, if you have this preference and also lots of money, you can pay a company called Glimpse to give you a vital sign monitoring device, which isn't magic but might as well be as far as I'd be able to explain it to you. If the device stops detecting a heartbeat, it sends a message to someone like me. I'm looking ahead, so I see the message before it arrives, and I can tell Glimpse who's going to die and when. They can warn the client, and the client can change their plans."

He looks impressed. (And) (there) (are) (so) (many) (people) (like) (you) (somebody) (can) (be) (doing) (that) (all) (the) (time)

"You don't need that many for someone to be on duty all the time, but it's very expensive, to limit the rate of messages we have to send back to something we can handle."

He shakes his head in amazement. (That) (sounds) (amazing) (anyway)

"Yeah. We also work on eclipses - to predict when someone's going to have a particularly bad out of control magic episode and get people on the scene to prevent it. Everyone who might eclipse is supposed to fast for a couple of days before the eclipse happens, so they don't have the energy to do any magic with, but there's always some people who can't or don't."

(What) (happens) (if) (people) (do) (not) (fast)

"They do magic at random. Sometimes harmless. Sometimes enough to kill a million people. - I not only won't but can't do that, to be clear. Eclipsed don't suddenly start doing random magic again after we stop. I can only do things I've learned how to do purposefully."

He looks shocked. (How) (does) (one) (kill) (a) (million) (people) (?)

"...it helps that we live in very dense cities. A big explosion or something in a dense city can do it."

(I) (can) (not) (imagine) (a) (city) (that) (dense)

"We can build buildings dozens of stories tall."

(A) (city) (of) (immense) (towers)

(And) (a) (child) (could) (fell) (all) (of) (it) (?)

"Well, we catch them first."

He shivers slightly. (Your) (world) (sounds) (very) (strange)

"It's really different!"

(I) (hope) (you) (are) (not) (trapped) (here) (forever)

"It would have some drawbacks. I'm going to focus on getting word to my brother. Maybe then a mage - they're the other kind of eclipsed - can figure out how to get here and back."

(What) (do) (mages) (do)

"Psions do things that do not have physical effects - so the stuff I've mentioned, illusions, some things with some machines that work similarly enough to people's brains, etcetera. Mages do things that do have physical effects, like teleporting. One might be able to teleport here, and bring me home. And then establish general interworld contact, I suppose."

(We) (can) (teleport)

"You can probably do lots of things mages can do, but I could tell that Lan Wangji was not a mage because translation isn't something mages can do. Also, neither kind of eclipsed makes objects persistently magical or needs to use an object to do magic except for the machines that work like brains, which is a special case."

(Machines) (that) (work) (like) (brains) (?) (Are) (they) (alive)

"No. They don't have experiences and they aren't organisms. But a complicated enough machine can store and manipulate information, and psions can interact with the storage and manipulation of information in that form as well as in the form of a person's mind."

The door opens, and a man who looks similar to Lan Wangji bows before stepping inside. 

Lan Wangji is behind him and steps in afterwards. 

(This) (is) (Lan) (Xi) (chen) (our) (sect) (leader) 

(He) (would) (like) (to) (speak) (with) (you)