The next morning Dian put a piece of wood on the table.

Not a stone. A piece of wood, roughly the size of his forearm, smooth on one side and rough on the other where it had been split rather than cut. Xuan looked at it, then at the four stones still lined up at the edge of the table, then back at the wood.

"Wood," Xuan said.

"Correct," Dian said.

"Different from stone."

"Also correct. Sit with it."

Xuan sat with it.

The difference was immediate and more significant than he’d expected. Stone had a quality of stillness to it, something that had been the same for a very long time and was going to keep being the same, layers of frequency that felt dense and settled and patient. Wood was none of that.

Wood was still alive in some technical sense, still doing the slow work of existing as an organic thing, and its frequency was layered differently, less like geological strata and more like growth rings, each one distinct but all of them continuous with each other in a way stone’s layers weren’t.

He found the first layer quickly, the outer one, which was easier to locate than stone’s equivalent had been now that he knew what looking felt like. The second layer took longer, not because it was deeper but because it kept moving slightly, the way something does when it hasn’t fully stopped being alive.

He mentioned this to Dian.

"Yes," Dian said. "Organic material is inconsistent. The frequency shifts depending on moisture content, temperature, age. Stone is a fixed target. Wood is a moving one." He paused. "This is why organic resonance work is harder. You cannot learn a single frequency and apply it repeatedly. You must read the current state each time."

"And living things are even more inconsistent."

"Considerably. But don’t think about that yet."

He kept saying that. Xuan kept thinking about it anyway.

The wood took him three mornings to reach the core of, which was faster than the first stone but slower than the subsequent ones, and when he found it the quality was completely different from anything he’d felt in the stones.

Warmer, somehow, less exact, more like a chord than a single note, multiple frequencies present simultaneously and interwoven in a way that made isolating the core more a matter of finding the dominant thread than the single bottom layer.

He described this to Dian after the third morning.

Dian nodded. "You’re developing the ability to read complexity. Stone is a single instrument. Wood is several playing together. What you called the core is the fundamental, the lowest and strongest thread that the others are built around." He tapped the wood once. "When you match it, you match the fundamental. The others follow."

"Do they have to."

Dian looked at him. "What do you mean."

"If you could match one of the other threads instead of the fundamental, would it do something different."

A pause. Longer than usual. Dian looked at the wood and then at Xuan with an expression that was doing its best to remain neutral and mostly succeeding. "That’s not a question most people ask at this stage," he said, which was not quite an answer.

"Is it a question with an answer."

"Yes." Another pause. "Matching a secondary frequency produces partial resonance. Less complete, less efficient, but more specific in terms of what it affects.

If wood has five threads and the fundamental governs the whole, a secondary thread might govern only the grain structure, or only the moisture, or only the surface layer." He looked at the wood again. "A skilled practitioner can choose which aspect of a thing to resonate with and affect only that aspect. It is very advanced work."

Xuan looked at the piece of wood with considerably more interest than he’d started the morning with. "So theoretically you could affect part of something without affecting the whole."

"Theoretically," Dian said, with the tone of someone closing a door politely but firmly. "Stones first. Then wood. Then we discuss theoretically."

Fair enough.

The resonance matching on the wood came together on the sixth day of working with it. He found the fundamental, held it, built the projection around it rather than toward it, felt the sympathy in his chest that meant the frequency was right, and released it.

The wood split. Cleaner than the stone had, actually, a long crack running with the grain from one end almost to the other, which made sense given what Dian had said about the grain structure being its own thread. He’d hit the fundamental and the whole thing had agreed with itself right down the middle. 𝓯𝙧𝙚𝒆𝙬𝙚𝒃𝙣𝙤𝒗𝓮𝓵.𝙘𝙤𝙢

Dian picked it up, looked at the split, set it down.

"Clean," he said.

"The stone was cleaner," Xuan said. "This one went with the grain. I didn’t direct it."

"You don’t direct resonance, you produce it and it finds its own path of least resistance. The grain was the path." He set it down. "Next time, aim for the end grain. See if you can direct the fault line across instead of along."

Xuan looked at the split wood. Across the grain instead of along it meant working against the material’s natural preference, which meant either hitting a secondary frequency or hitting the fundamental hard enough that the material’s preference became irrelevant.

He didn’t say this out loud. He just nodded and made a note of it.

That evening the presence to the north was back, and this time it was close enough that Xuan felt it before he’d even settled into his usual awareness extension. Not close in absolute terms, still well outside the sect’s boundaries, but close enough that the edge of his range caught it without him having to push.

And this time he could hear the rhythm clearly.

It was resonance work, he was now certain of it. The pattern was too deliberate and too consistent to be anything else, and having spent the past weeks doing nothing but resonance work himself, he recognized the texture of it the way you recognize a familiar task being performed by unfamiliar hands.

Same process. Different practitioner. And noticeably more refined than anything he was currently capable of, which was a thought he filed next to the door Dian kept closing on him and tried not to linger on.

He went inside and told Dian.

This time Dian didn’t ask for the direction. He just listened, and when Xuan finished he was quiet for longer than usual, and when he spoke his voice had the measured quality it got when he was choosing words specifically.

"How refined," he said.

Xuan thought about how to answer that. "Clean. No waste in it. Whatever they’re doing, they’ve been doing it for a long time."

Dian nodded once. He didn’t sit down, which he usually did when they talked in the evenings. Just stood in the middle of the room with his hands loose at his sides, looking at nothing in particular. "And the distance."

"Closer than before. Still outside the sect but not by much. Maybe a ten minute walk north, if I’m reading it right, which I might not be."

"You probably are." He said it quietly and not to Xuan specifically, more like confirming something to himself. Then he looked at Xuan directly. "Go to bed. Don’t extend your awareness north tonight, not even passively. Pull it in and keep it in."

Xuan looked at him. "Why."

"Because a practitioner skilled enough to do clean resonance work at that level is skilled enough to feel when someone is reading them, and I don’t want them to know the extent of what you can currently detect." He paused. "Can you do that."

"Pull my awareness in. Yeah."

"Keep it in all night. Not just until you fall asleep."

"I don’t have a lot of control over what I do while I’m asleep."

Something crossed Dian’s face that was almost, almost the ghost of amusement. "Your passive awareness while asleep is not the concern. A sleeping person’s awareness doesn’t have intent. It’s the moment between waking and pulling it in that matters. When you wake up tomorrow, pull in immediately before you do anything else."

Xuan nodded. This had gone from vaguely interesting to something with more texture to it, and while he wasn’t exactly worried he was paying a different kind of attention than he had been an hour ago. "Are you going to tell me who it is."

Dian was quiet for a moment. "I don’t know yet," he said, and the thing about it was that it sounded true, but it also sounded like half of a true thing, which was different.

Xuan went to bed as instructed. He pulled his awareness in tight, closer than he usually kept it even during focused training, just the immediate space around him, his own room, the walls, the floor, nothing beyond. It felt strange and slightly claustrophobic after weeks of expanding it daily, like being back in a small space after getting used to a large one.

He lay there in his pulled-in awareness and stared at the ceiling and thought about the piece of wood with the long crack running down its grain, and the stone in two halves, and the difference between a thing you overpower and a thing you simply tell the truth to.

And whoever was to the north, doing clean and practiced resonance work in the dark outside the sect walls.

He fell asleep eventually, because being tired was still democratic, and in the morning he pulled his awareness in before he’d fully opened his eyes, same as Dian had said.

But for a half second before he did, in that immediate space between sleep and waking, his awareness had been open and unguarded and broad.

And the presence to the north had been very close.

And it had been still.

Like it was waiting for something.