He chants for a few seconds, and the promised food appears with a diffuse glow - bread, mostly, as loaves and smaller rolls, but also a container of oats, a bushel of apples, a large tub of butter, and a small wheel of cheese, plus a couple of barrels of water. Raafi picks up a roll and takes a bite, then grabs an apple, too.

"What are these?" he asks. Some things, like the bread, seem basically straightforward in construction, even if the details are unfamiliar. Others, like the butter and cheese, he's baffled by. 

"Butter, there, and cheese - butter is churned cream, usually spread on bread, and cheese is fermented milk. And these are apples, a kind of tree fruit, don't eat the core."

"I had guessed these were a fruit." He's still handling a cheese as though he finds it perplexing. "This is fermented, but will go bad after only a day?"

"Regular cheese doesn't; conjured food is different, the spell wears off and it stops existing correctly. Except the water, water's especially easy to conjure. It's fine to eat, though, it's just as good that way. Here-" he takes the cheese, and takes a small knife out of his belt to cut through the rind and slice off a piece for himself and a smaller one to offer back. "This is pretty plain cheese; I can get a spell that can do nicer food but it's more complicated, doesn't make a very good demonstration."

He eats the piece of cheese. "Interesting," he pronounces. 

"I can show you how to make a few of the simpler kinds, if you want. Butter, too. For now the healing demonstration, though - do you have anyone around who needs it? My basic healing spell only does the same kind of healing that you'll eventually get from rest, I'd have to prepare something specific to break a fever or restore a lost limb or anything."

"...My brother is currently recovering from an injury to his back." 

"That sounds like the right sort of thing," he nods. "Unless he's paralyzed; I can fix that, too, but it's a separate spell, it'll have to wait until tomorrow."

"He isn't paralyzed, it's all skin and muscle damage, his spine was unaffected."

"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?"