The cold didn't stop them.
It tried the valley's particular brand of winter, bone-deep and patient, the kind that didn't announce itself dramatically but simply settled into your joints and stayed there.
The two boys trained through it with the specific indifference of people who have decided that discomfort is not a reason to stop. Their eyes had the same quality not identical, but matching. Twin furnaces burning against the grey of the valley sky.
As the months moved into each other, the valley began to heal around them.
The mass graves were covered by new snow. The smell that had defined the first weeks after the massacre faded slowly, replaced by wood smoke and the ordinary cold. People started appearing at their doors again. Children came outside.
The elderly found their way back to the spots they had occupied before everything happened.
Every evening after training, Ryuuken and Rui walked the village paths together.
Ryuuken had a quality that couldn't be trained into a person the ability to make people feel less alone simply by being present. Children followed him at a distance that gradually shortened the more times they saw him.
Elderly survivors offered him small things food, nods, the particular silent prayer of people who have decided someone is worth watching over. He didn't seek it. It happened around him the way warmth happens around a fire.
Rui stood beside him and watched.
He saw the reverence growing in people's eyes. He recognized the shape of it it was the same shape the reverence for Iriz had taken, before everything. The people of the valley were looking at Ryuuken the way they had once looked at someone who made them feel safe.
Ryuuken worked with a desperate intensity to meet those expectations. Rui could see the pressure of it in the way he trained never stopping, never acknowledging fatigue, the sword moving until the air around it hissed. They meditated under the crushing cold of waterfalls. They ran the mountain paths at altitudes that made breathing a conscious effort.
And Rui hit a wall.
Every day it was the same result. Twenty sword swings. Sometimes nineteen. On the best days, twenty-one, which felt like mockery. Then the frozen ground would come up to meet him, his lungs burning with a heat that had nothing to do with warmth, his heart working so hard he could feel it against his ribs like something trying to get out.
He lay there one morning, staring at the sky, and heard Ryuuken's rhythm continue without pause. The sound of it consistent, unhurried, the rhythm of someone who has not hit a wall was its own specific kind of pain.
Then the rhythm stopped.
Footsteps. Ryuuken's shadow fell across him. A hand extended downward.
Rui knocked it away with a sharp, bitter motion.
He kept his eyes on the ground. "Stop being so nice. You can tell me I'm dragging you back. We are friends but that doesn't mean you have to hide my weakness from me."
His fingers white-knuckled against the hem of his grey cloak.
"So you're jealous, eh?" Ryuuken crouched down, bringing himself level with Rui. He placed a heavy hand on his shoulder. "Come on, don't be like that. You are making progress in your own way. Just give it some time."
"Progress?" The word came out cracked, like something that had been under pressure too long. "I haven't made progress in a year. You've improved so much, and here I am I can't swing a sword more than twenty times."
His face was a mask of frustration and something uglier underneath it that he wasn't calling by its name.
"Everyone has their own way and time of developing," Ryuuken said. His voice was light, almost airy no fatigue in it, no strain. That ease, on this particular morning, felt like a cruelty he wasn't intending. "You shouldn't take things too seriously. Just trust the process."
"You don't see problems when they don't concern you!"
The shout came out before Rui decided to let it. He felt it leave him and didn't call it back.
"You have a bright future. But what will I do? I can't perform a basic spell. You have your speed. I have nothing I can rely on. I'm not strong. I'm not intelligent. I can't even talk to people properly." He looked at the dirt between his hands. "I am a defect piece in nature."
Ryuuken was quiet for a moment.
When he spoke again, the airy quality was gone.
"You surely have a big opinion about me," he said. "You think I'm perfect? I passed out that night out of fear. You and I both lost a friend. I can't perform a basic spell either." He gripped his sword tightly, his knuckles going the same color as Rui's. "What's the use of my stupid speed? I can run away with it. Even that didn't help that night."
Rui's expression didn't change. He was still in it whatever lake he had fallen into, the self-hatred running deep enough that even Ryuuken's honesty wasn't finding the bottom of it.
Ryuuken looked at him for a long moment.
"The truth is," he said, his gaze dropping, "we can't perform magic."
Rui looked up.
"What are you talking about? You already travel at near the speed of sound that's clearly magic. Unlike me."
"I thought the same." Ryuuken was still looking at the ground. He wasn't moving, which was unusual enough that Rui noticed it. "I thought I had magic, and if I worked on it I might be able to fight Aurelith someday. But I found my father's diary."
He reached into his coat and produced it a small book, its pages unusual in a way Rui couldn't immediately identify, as if they had been made from something other than ordinary paper. He turned to a specific page and held it out.
Rui read it.
His father had been a medic for House Corvus. On the page, in careful handwriting, a drawing an egg shape beside the word core and beneath it the words: Some people are unfortunate who are born with their core broken. They cannot generate mana inside themselves. The universe makes things balance, as my master used to say. My son despite being born with a blessing his core is broken.
"What does 'blessing' mean there?" Rui asked, his mind already pulling at the threads of it. "Is he talking about your speed? Or just that your birth was a blessing to him?"
"I don't know," Ryuuken said. "He disappeared four years ago. I can't ask him." He turned a few pages forward. "But he mentions a place Yukigai. And a technique Shizen Shakkai. He says it's taught to people whose core is broken."
The word Yukigai was written in red ink. For a moment, Rui thought it was blood. He couldn't entirely rule it out. The paper had that quality.
"Yukigai," Rui said, thinking. "The ruined temple in the far north." He had heard it in childhood the legend of a temple built from gold, a Griffin that protected it, a Demon King who slew the Griffin and burned everything to the ground. He had never believed the gold. He believed the Demon King that much was documented history, the thousand-year rule ended by a party of heroes two decades ago. The temple itself was real. Ruined, but real.
"Yeah," Ryuuken said. "The technique I think it's how to borrow mana from outside yourself instead of generating it internally. And if it works for me--," he looked at Rui "you should come too. Maybe you can find something there."
Rui looked at the page. At the red word. At the unusual paper that was not quite paper.
Then he looked at the practical reality of what Ryuuken was proposing.
"Going far north is dangerous, idiot! That region is completely unstable wars, competing mobs, nobody in their right mind claims territory there, not even the Great Noble Houses."
"I know it's dangerous," Ryuuken said, without the argument leaving his voice. "But nothing comes without a price. For Mui, we will have to do it."
"Stop using Mui as leverage to manipulate me." Rui handed the diary back. "What does he have to do with it?"
Ryuuken didn't answer immediately. He turned to a different page and showed it to Rui.
The second son of Lord Corvus. Born with a broken core.
Rui stared at it.
"How did your father know that?"
"He was the head medic here. I think he was present at the birth." Ryuuken closed the diary. "It doesn't matter how he knew. What matters is that Mui can't generate mana either. If he becomes Lord of House Corvus without any ability to fight and someone tests it House Corvus falls. We can't let that happen."
Rui was quiet for a long time.
Ryuuken's words were true and he knew they were true and knowing they were true didn't make the north any less dangerous.
"Give me a year," Rui said finally.
Ryuuken stared at him.
"A year? We shouldn't waste--"
"Give me a year to research the region properly." Rui picked up his sword and stood. "I can't lose more people. Not again. So give me a year to make sure of everything." He looked at Ryuuken with an expression that had stopped being negotiable. "Mui is the future. But we will have to protect the future in the present."
He walked away.
Ryuuken watched him go and said nothing, which was its own kind of answer.
Rui kept his word.
He spent the year pulling information from every source available to him traveler accounts, merchant routes, old military records from before the noble houses had given up on claiming northern territory. He mapped the instability as best he could. He identified which factions were fighting each other versus which ones could be talked to. He found the names of the bandits who controlled the passes and the names of the ones who could be reasoned with.
When the year ended, they went.
The journey north took six months. The cold was a different kind than the valley's less patient, more active, the kind that tried to kill you with intention rather than simply by being present.
They fought their way through three different bandit groups and talked their way past two others. Rui built small alliances where he could, trading information and safe passage for promises he calculated they could keep.
Both of them kept Mui between them at every stage of the journey, the boy silent and hollow-faced and present, not yet understanding what he was being taken toward.
They found the temple eventually.
It was not made of gold. It was made of something older than that stone that had been there long enough to become part of the mountain it sat against, the Griffin's remains still scattered at the entrance in pieces that the centuries had polished smooth. Inside, they found what the diary had promised.
Ryuuken took to it immediately. He had already been doing it without knowing pulling speed from something outside himself rather than generating it internally. The temple gave him the framework to understand what he had been doing instinctively and do it deliberately.
Rui learned to step into shadows and not be seen.
He was not happy with it. He had hoped for something that felt like strength a weapon, a force, something that could be pointed at an enemy. Shadows felt like hiding.
The instructor, a weathered woman who spoke rarely and observed constantly, told him: the element chooses the user, and the user's character shapes what the element becomes. His character was patience and observation and the willingness to be overlooked. The darkness had chosen correctly.
He moved on.
Mui learned to generate mist pulling mana from the air itself, which was the most abundant source available and the hardest to master. The boy who had stopped wanting anything began, very slowly, to want this. The mist responded to his will with the particular intimacy of something that recognized him.
After two years, they returned.
Mui became Lord of House Corvus at twelve. The opposition was vocal until it wasn't, Ryuuken's influence and Rui's diplomacy working together the way they always had one of them making people feel safe, the other making people feel heard, the combination harder to resist than either of them alone.
Four years of building something. Four years of the valley healing into something worth protecting.
And now Rui was on his knees in a burning corridor with Ryuuken's blood on his hands and the same helplessness in his chest that had been there nine years ago, the same floor, the same inability to do the one thing that mattered.
"I will help you."
The voice cut through everything.
"But on one condition."
Rui looked up.
Arlienne stood before him. She had refused once the cold eyes, the precise cruelty of what makes you think I know healing magic, and even if I did, why would I help you. He had accepted that refusal as final. He had no framework for why it would change.
"You will give the Oath of Echoes," she said, stepping closer, her eyes steady and certain and already knowing his answer. "And I will heal your friend."
She extended her hand.
The smirk on her face was the specific smirk of someone who has been waiting for the right moment and has calculated, correctly, that this is it.
Rui looked at her hand.
He looked at Ryuuken.
He looked at the blood.