Ren could not sleep.
This was not unusual. He had never been a good sleeper — back in the Outer Ring he would lie awake for hours sometimes, listening to the night sounds of the neighborhood, his mind running through the next day's water route or his mother's medication schedule or the calculations of how much the family had and how much they needed and how wide the gap between those two numbers was. Sleep had always been something that eventually found him rather than something he went looking for.
But tonight was different.
Tonight his ribs ached from three solid hits and his pride ached from something harder to name, and both of those things he could have managed. What he could not manage was the feeling that had been sitting in the back of his chest since the sparring session ended — a low, persistent hum, like a second heartbeat that was not his own.
He had felt it faintly before. Back in the Outer Ring, on the roof at night, looking at the city. He had assumed it was just the distance — the World Tree's mana radiating outward the way heat radiates from a fire, faint at the edges, barely noticeable if you weren't looking for it.
But he was inside the city now. Closer.
And the hum was not faint anymore.
It was patient. Steady. It pulled at him the way a sound pulls at you when you can almost make out the words but not quite — that specific discomfort of almost-understanding something. He lay in the dark and listened to Sev's quiet breathing from the other bed and stared at the ceiling and felt the pull and tried to ignore it.
After two hours he gave up ignoring it and got dressed.
The city at night was a different world than the city in the day.
The merchants were gone. The officials with their ledgers were gone. The crowds and the noise and the purposeful movement had all retreated somewhere, leaving the marble streets empty and clean and oddly large — streets built for daytime crowds felt cavernous when only one person was walking them. The mana lanterns were still lit but lower somehow, their light softer, less practical. The city at night did not need to be useful. It just needed to exist.
Ren moved through it quietly.
He did not know where he was going exactly. He was following the hum — letting it pull him the way you follow a sound you can't identify, turning toward it when it grew stronger, correcting when it faded. Through the secondary roads and back onto the main avenue and then off it again, heading toward the center of the city, toward the part of Halvenmoor he had only glimpsed from the dormitory window.
The buildings got older as he walked. Not worse — just older. The newer construction of the outer city districts gave way to stone that had been standing for a very long time, worn smooth at the corners, the carvings above the doorways weathered to soft suggestions of whatever they had once depicted clearly. The streets narrowed. The lanterns became less frequent.
And then the street opened up.
He stopped walking.
The square ahead of him was large — larger than the entire main square of the Outer Ring. Its paving stones were different from the rest of the city: darker, older, laid in a circular pattern that radiated outward from the center like rings on water. Low iron fences lined the perimeter, not high enough to keep anyone out, more like a suggestion of boundary than an actual one. Small stone benches sat at intervals along the inside of the fence, worn smooth by years of use.
And in the center of all of it: the World Tree.
Ren had seen the top of it from the dormitory window. That had not prepared him for the bottom.
It was enormous in a way that made the word enormous feel inadequate. The trunk alone was wider than his family's entire shack — wider than three shacks put side by side. The bark was deep grey, almost black in the night light, and deeply ridged, the ridges running up the trunk in long vertical lines that caught the light differently depending on the angle. The roots spread outward from the base across the paving stones, rising above the surface in great arching curves before plunging back down, smoothed on top from centuries of people sitting on them.
The tree glowed.
Not brightly. Not the sharp, active glow of a mana lantern. Something quieter — a faint luminescence that came from somewhere inside the bark rather than from the surface, a slow pulse of silver-green light that moved through the tree the way a heartbeat moves, regular and deep. The branches above were too high to see clearly in the dark, lost in their own canopy, but the light moved through them too — faint threads of it, tracing the paths of the largest branches up into the darkness.
Ren stood at the edge of the square and looked at it.
With his bare eyes it was simply massive and faintly glowing and very old.
With his Insight open, it was something else entirely.
The mana around the World Tree was the thickest he had ever seen — layers of it, moving in slow currents like deep water, ancient and dense and complex in ways he did not yet have the vocabulary to describe. It was the source of the hum he had been following. Up close the hum was not uncomfortable anymore. It was almost familiar, the way a sound becomes familiar when you have been hearing it long enough.
But there was something wrong with it.
Running through the slow, deep currents of the tree's mana — visible clearly to his eyes, impossible to miss once he saw them — were threads of black. Not mana. Something else. Something that moved against the current rather than with it, slow and deliberate, spreading outward from somewhere in the roots like cracks spreading through old stone. Where the black threads touched the silver-green light it dimmed. Where they had passed through, the mana was thinner, duller, moving more slowly.
He had seen illness before. He had watched his mother's illness arrive gradually, incrementally, each day almost normal until you compared it to a day from two years earlier.
This looked like illness.
"You see me."
Ren went very still.
The voice was not a sound exactly. It arrived in the same place that the hum had been — somewhere in his chest, behind the ribs, in the space where the second heartbeat had been sitting all evening. It was old. Female. Tired in a way that had nothing to do with sleep.
"You see my pain."
Ren looked at the tree. His heart was moving faster than usual. He kept his voice steady. "Yes," he said quietly. "I can see it."
"How?" A pause. The question was not suspicious. Just genuinely curious — the curiosity of something very old encountering something it did not expect. "Others stand here every day. Priests. Scholars. Ranked warriors. None of them see what you see."
"I was blessed with Insight," Ren said.
A long silence.
The tree's slow pulse continued — silver-green light moving through the bark in its quiet rhythm, the black threads moving against it.
"Insight," the voice said finally. "No. That is what they called it. What you have is older than that word. You were given Sight. The true kind. The kind that sees what is broken rather than what is shown."
Ren looked at the black threads spreading through the roots. "What is breaking you?"
"Someone is feeding from my roots. Taking my mana slowly, carefully, in amounts small enough that the people who watch me have not noticed the change. They have been doing it for three years." The tiredness in the voice deepened slightly. "I have been dying for three years and no one who can do anything about it has been able to see it."
"Until now," Ren said.
"Until now."
He stood there for a moment. The square was empty and quiet. Somewhere in the city a bell rang the third hour of the night.
"Why are you telling me this?" he asked. "I'm fifteen. I'm F-Rank. I got knocked down three times today by a boy who wasn't even trying very hard."
"I know what you are," the voice said. "I also know what you will be. Those are not always the same thing."
"That's not an answer."
"No," the voice agreed. "It isn't." Another pause. "I am telling you because you are the first person who has stood in this square and seen my pain without me showing it to them. I am telling you because I am running out of time and I am running out of options. And I am telling you because of what you carry in your chest."
"What do I carry?"
"The same thing she carried," the voice said quietly. "The girl with silver eyes. Three years ago. She stood exactly where you are standing now."
Ren stopped breathing for a moment.
"Yuna," he said. It came out flat. Not a question.
"I did not know her name. But she stood here. She saw me. We spoke, as you and I are speaking now." A pause that felt careful. "She was brave. She reminded me of a sapling I once knew — small but very determined to grow toward whatever light was available."
"Where is she now?"
The silence that followed was the wrong kind. Long and careful and full of something the voice was deciding how to say.
"I do not know exactly," it said finally. "But she is still in the city. And she is not free."
Ren's hand had found the wall of the iron fence without him noticing. His fingers were wrapped around the iron. He made himself loosen them. Deliberately. The way he had loosened his hand on the well rope.
"Tell me everything," he said.
The World Tree told him slowly, in the measured way of something that had existed for a very long time and had learned not to rush through important things.
Three years ago, children with silver eyes had begun disappearing. Not all at once — one here, one there, spread across enough time that the pattern was not obvious. They came to the city as Blessed. They were assigned to academies. And then they were gone. No records of transfer. No records of departure. No letters home.
The tree had felt it happening. Each silver-eyed child carried a trace of the original Sight — the first blessing, the oldest one — and when they disappeared, the tree felt each absence the way you feel a candle being snuffed out in a dark room. One at a time. Small losses. But accumulating.
And wherever they went, the black threads in the tree's roots grew a little thicker.
"Someone is using them," the tree said. "Their mana. The particular quality of it that comes with silver eyes. It is being fed into my roots — not to nourish me. To poison me slowly. To accelerate the rot."
"Why?" Ren said. "What does killing you accomplish?"
"When a tree of my size dies, it does not simply stop. There is a release. All the mana I have stored across centuries — all of it — returns to the world at once. One concentrated burst." The voice was steady but there was something underneath it that Ren recognized as grief. "For whoever is standing at my roots when that happens, and has prepared the right vessel to absorb it — the power would be beyond any rank currently recognized. Beyond SS. Perhaps beyond anything the world has seen."
"And the rest of the world?"
"The rest of the world loses its mana source. Permanently. The ranks collapse. The magic fails. The blessings stop." A pause. "We call it the Silent Winter. When the light goes out and everyone becomes equal in the dark."
Ren stood in the empty square and let that settle.
It was a large thing to hold. He held it carefully.
"How long do you have?" he asked.
"At the current rate — one year. Perhaps slightly less."
He nodded. One year. He had entered the city two days ago. He was F-Rank. He did not know who was doing this, or where the silver-eyed children were, or how to stop someone powerful enough to orchestrate something this large without anyone noticing for three years.
He had one year.
He thought about Yuna. She is not free.
"What can you do for me?" he asked. Not demanding. Just practical. Mapping the situation.
"I can offer you what I offered her," the voice said. "A fruit."
The tree's bark shifted. It was subtle — just a change in the texture of the wood near the base, a slow movement like something rising through still water. Then, at eye level on the trunk, a small hollow formed, and inside the hollow sat a single fruit.
It was apple-sized. Silver. It gave off its own faint light — not the silver-green of the tree's mana but something cooler and more precise, like light through clear water. It sat in the hollow and pulsed quietly.
"Eat this and it will bind you to me. You will feel my heartbeat — and my pain — from anywhere in the world. You will share my remaining time. When I die, you will feel it." The voice was honest about this, which Ren appreciated. No softening. Just facts. "But your body will begin to catch up to your eyes. Not immediately. Not all at once. But the potential is there. The fruit will unlock what you were always capable of and could never access."
"And Yuna?" he said. "She ate one."
"Yes."
"And she is still missing."
"Yes." The voice was quiet. "The fruit does not protect you from everything. It did not protect her from what she did not know to look for. But you know now. You are walking into this with your eyes open."
Ren looked at the fruit.
He thought about it for approximately ten seconds.
Then he reached into the hollow and picked it up.
It was lighter than he expected. Cool against his palm. The pulse of it was steady — calm, like the tree itself. He looked at it for a moment, turning it slightly, watching the cool silver light shift across its surface.
He put it in his mouth and bit down.
It dissolved before he could properly chew it — not in an unpleasant way, just immediately, like it had been waiting for contact and had somewhere to be. The taste was clean. Cold. Something like water from a very deep well, the kind with minerals in it that you can feel rather than taste.
For three seconds nothing happened.
Then it felt like every bone in his body cracked simultaneously.
He went to his knees. Not from pain exactly — or not only from pain. From the sheer force of whatever was moving through him, restructuring things, rewriting the body's understanding of what it was for. His vision went white. His muscles seized and released and seized again. He felt his spine do something that should have been impossible and was apparently necessary.
He heard the tree's heartbeat — clearly, suddenly, the way you hear music when someone turns the volume up. Slow. Deep. Steady but laboring. A great engine running on less fuel than it needed.
He felt the rot too. A distant ache, spread through his chest like an echo of something much larger. He understood what it meant now — not abstractly, but physically. The tree was dying and he was connected to it and he would feel that death approaching for whatever time remained.
He pressed his forehead against the cold paving stones and breathed.
In. Out. In.
The pain receded. Slowly. By degrees.
When he raised his head, the square was still empty. The lanterns drifted. The tree stood as it had before — massive, quiet, faintly glowing.
But different. Or he was different. The space between them felt like something he could feel the edges of now, a connection that had a texture and a weight. He put his hand on the root nearest him and felt the heartbeat through the bark clearly, the same way you feel a pulse in a wrist.
"You're still there," he said.
"I am still here," the voice said. "For now."
He sat on the root and breathed and let his body finish deciding what it was going to do with what had just happened to it.
"One year," he said.
"One year."
"I'll find out who is doing this. I'll stop them. And I'll find the silver-eyed children." He paused. "I'll find Yuna."
The tree was quiet for a moment.
"She said something similar," it said finally. "When she stood where you are standing."
"What did she say?"
"She said: I'll be back. Give me time."
Ren looked at the bark. At the slow pulse of light moving through it, steady despite the black threads working against it.
"She was right," he said. "She just ran into something she didn't expect. That won't happen to me. Because I know it's coming."
He stood up. His legs held. His ribs still ached from the sparring session — that particular pain had not gone anywhere — but underneath it there was something new. A steadiness. Like a second floor had been built beneath the first one, deeper down, more solid.
He looked at his hands. Flexed his fingers.
"Can I come back here?" he said.
"This is your tree as much as mine now," the voice said. "Come whenever you need to."
He nodded. He turned and began walking back across the square.
"Boy," the voice said.
He stopped.
"The one doing this — they are not small. They are not careless. They have been building this for a very long time and they are very patient and they believe they cannot be stopped." A pause. "Do not underestimate them because you know they exist. Knowing an enemy exists and knowing what they are capable of are different things."
"I know," Ren said.
"Do you?"
He thought about Valerius hitting him three times. About lying on the floor and seeing the ceiling rotate. About the gap between what his eyes saw and what his body could answer.
"Not yet," he said honestly. "But I will."
He walked back through the empty streets toward Willowbrook.
Behind him the World Tree stood in its square and pulsed its slow light into the dark and held on for one more night.
He was back in his bed before the fourth bell rang.
Sev was still asleep, breathing quietly, completely undisturbed. Ren lay on his back and looked at the ceiling and felt the World Tree's heartbeat in his chest — slow, steady, there.
He thought about Yuna standing in that square three years ago. Eating a fruit just like the one he had just eaten. Having the same conversation. Making the same promise.
And then something had gone wrong.
He did not know what. He did not know when, or how, or who had been involved. He had almost nothing — a direction, a timeline, a heartbeat in his chest that was not his own.
He looked at the ceiling.
Okay, he thought. Start with what you have. You have your eyes. You have one year. You have a building full of people whose gifts everyone else has already written off.
Start there.
He closed his silver eyes.
This time sleep found him quickly. It did not usually do that. He decided to accept it without questioning it.
Tomorrow Master Kael would be hungover and the lesson would be brutal and his ribs would still hurt.
He would figure out the rest from there.