"I can take care of that, no problem. Now, if you'd like."

Nod. 

He leads him to another area, then knocks on a door. "Brother, it's me. I've brought a new healer." 

"Come in." 

He's half-propped-up in bed, reading some kind of scroll. 

"Hello," he nods. "May I see, or is it painful for you to move? It's more efficient to match the size of the spell to the severity of the injury," he explains to Lan Xichen, "but I don't expect to need much magic today, I can use a bigger spell than I need to."

He nods, and begins removing his robes. 

Underneath his torso is heavily bandaged; there isn't much blood leaking through at the moment, but the bandages aren't pristine either. 

He's very gentle getting the bandages off. He freezes, for a moment, when he sees what's underneath; it's subtle compared to the rest of his body language, but he's definitely startled. He keeps it out of his voice, though, when he speaks - "I might need two, for this. And I'm afraid you'll have some scarring where it's started to heal, unfortunately. Nothing worse than that, though." And he chants, and his hand glows blue; he touches Lan Wangji's back above the highest wound, and they close almost completely. "One more," and he repeats the process, and the healing is complete.

He blinks. 

He rotates his shoulder, checking for pain, and re-dresses and stands. 

"Thank you." 

"You're entirely welcome."

"How did you do that?"

"I'm from another world, with more active gods; I'm a cleric of one of them, our god of travel, who gives me various kinds of magic. That was positive energy channeling."

"What does 'positive energy channeling' have to do with travel?"

"It doesn't especially. Clerics' job is to look after our gods' interests; we mostly get the same sorts of tools to do that with. I'd usually use it to help people injured on the road, or I might be asked to travel with someone through dangerous territory where it'd be useful security. And I do have other magic that's more about travel directly."

Nod. "What else can you do?"

"A pretty wide variety of things. Lots of kinds of healing, mostly physical but some mental. Raising the dead too, though that's expensive. Some combat magic, though I don't personally favor it, I usually just summon an elemental if I'm in trouble like that. Protective magic, too, for combat, and physical and mental improvements for combat or outside it. Divinations, a few different kinds - the translation magic I'm using is a divinaton, and I can do things like checking whether a plan is a good idea or not or whether someone's telling the truth. For travel magic, I favor teleportation, though I can only teleport to places I've seen, with my long-range one, and I can also fly two different ways and improve my land speed. I expect I'd be able to teleport back to my world if I was prepared for it, but I'm not, I probably won't be able to go back until I've started getting the highest tier of spells - a decade, maybe. I might be able to do something about your undead problem, too - I'm not sure, since it sounds like they work a little differently here, but the spells I'd use at home might still help."

"Raising the dead?"

"Mmhmm. If they're recently enough dead and some of the remains are available."

"Mn." 

"How recent is recent?"

"I can get two different spells that can do it; the less expensive one only works within fifteen days unless the corpse is magically preserved, but the other one works up to a hundred and fifty years, for me. There's also a ninth-tier spell - spells in my world only go up to ninth tier, and I can cast up to eighth right now - that doesn't need remains, I expect to be able to do that eventually."

"How eventually." 

"Wangji..."

"How. Eventually." 

"My guess at home was ten years. It might be more or less than that, here, depending on how much there is for me to do - almost certainly no less than five."

Nod. 

"There was...a war. And then some further incidents after the war."