The first wave struck the eastern wall at the hour when the sun cleared the peaks, and from the healing quarters Valeria could hear the sound of it long before the first stretcher arrived.

It was not the sound she had imagined. In the weeks of planning she had pictured battle as a roar, a single tearing noise like a storm breaking. Instead it came to her in layers: the dull, rhythmic thud of ladders striking stone, the sharp crack of arrows loosed in volleys, the high thin cry of men falling, and beneath it all a deep and steady drumbeat from Cedric's camp that seemed to come up through the floor and into her bones. She stood at the long central table with her sleeves bound back and her hands arranged on a tray of instruments, and she made herself breathe in time with the drum until the fear sank down into a cold, useful stillness.

"First arrivals," Malakor said, and the doors swung open.

They came in a steady flow after that. Men with arrow wounds in the shoulder and thigh, men with crushed hands where ladder rungs had caught them, a boy of seventeen with a gash across his scalp who kept asking, politely and over and over, whether the wall was still standing. Valeria worked with the brisk economy she had learned in the Crimson Empire's chambers, where efficiency had sometimes been the only mercy available. She cleaned, stitched, bound, and moved on, speaking to each man in the same low, level voice, learning names as she went and forgetting them the moment they were useful no more.

By midday the beds were full and the floor was filling. She had stopped noticing the smell.

"The east wall holds," a runner reported, gasping, as she knelt beside a man whose forearm was open to the bone. "Captain Kaelen says to tell you the ladders are burning. He says the archers are doing better than he feared."

"And Lord Alaric?"

"On the west wall, my lady. They tried the postern at dawn. He drove them back himself." The runner swallowed. "He was laughing, they say. I have never heard him laugh in a fight."

Valeria did not know what to make of that, and there was no time to find out. She tied off the last stitch and moved to the next.

It was past the second bell of the afternoon when the first of the strange cases arrived.

Two soldiers carried him in between them, a broad, grizzled man named Dorren whom she had treated a week earlier for a sprained wrist. He was conscious, but his eyes were wrong. They rolled and strained and would not settle on any face, and a fine tremor ran through his entire body, rattling the stretcher. There was an arrow in the meat of his shoulder, a short heavy bolt with a dark, oily sheen along its head, and the skin around the wound had turned a deep, mottled gray.

"It was a crossbow," said one of the bearers. "They have a whole line of them, my lady. Bigger than ours. The bolts hit and he went like this almost straight away."

Valeria cut the tunic away from the shoulder. The gray was spreading as she watched, thin black threads fanning out along the veins in a pattern that made her stomach lurch with a terrible, familiar recognition. She had seen those threads on Alaric's forearms. She had traced them with her fingertips on the nights of the full moon.

"Malakor." She kept her voice even. "Come and look at this."

He was at her side in seconds, bending over the wound, and she saw him go still in the way she had come to dread, the stillness of a man whose worst theory has just been confirmed. He touched the edge of the discoloration with a gloved finger, brought it close to his face, and breathed in.

"Blood Moon essence," he said quietly. "Concentrated. Whoever made these did not merely dip the bolts in the curse. They distilled it."

"Is that possible?"

"Not through any method I know. Not unless they had a living source to draw from." He straightened slowly. "Cedric has had six years to study his own creation. He may have kept samples of his nephew's blood from the beginning. I would not put it past him."

Dorren cried out, a raw animal sound, and arched against the stretcher so violently that the two bearers staggered. His fingers were curling inward, the nails thickening before her eyes. Valeria caught his wrist and pinned it against the table with all her weight, and felt the muscle beneath her hands ripple and twist like something alive.

"He is changing," she said. "Not fully. It is too fast, and it has no moon to anchor it. It is burning him from the inside."

"Then the fever will kill him within the hour, if the madness does not." Malakor was already reaching for a bottle. "I have nothing that touches this. Every herb I know is useless against the curse itself, as you know. The most I can do is sedate him, and hope the change stalls."

"Do it."

He worked quickly, dripping a thick syrup between the man's clenched teeth, and slowly the violence ebbed from Dorren's limbs, though the black threads continued their slow crawl toward his heart. Valeria stood with one hand still gripping his wrist and thought, with the cold clarity that always came to her in a crisis, about everything she knew.

The essence behaved like the curse. It followed the same pathways, produced the same symptoms. But the curse in Alaric was bound, held in its slow cycle by six years of adaptation, anchored to the moon. In a man who had never carried it, it was wild, and the body had no defenses against it at all.

And the one thing in the world that suppressed the Blood Moon Curse was the compound in her own veins.

"I could help him," she said, very low, so that only Malakor could hear. "A few drops, diluted. Not enough to endanger me."

"No." His answer came instantly, and with a force that startled her. "Absolutely not. Not here, not for him. If it works on one, they will bring you every man the bolts have touched, and there will be fifty by nightfall. You would be bled dry before dusk." He met her eyes. "Lady Valeria, I will say this once and plainly, because there may not be time to say it later. You are the only thing in this citadel that Cedric cannot replace. Whatever else we lose today, we cannot lose that."

"I am not a stockpile to be guarded, Malakor."

"No. You are the reason any of us has a chance at a future. I do not say it as a scholar. I say it as someone who has watched you give more of yourself than any of us deserved." His voice softened. "Let me do what I can with the tools I have. Please."

She held his gaze for a long moment. Then she nodded once, and released Dorren's wrist.

They worked on. The afternoon wore on in a blur of blood and linen and low, urgent talk. Three more men arrived with the same oily wounds, and then six, and Valeria learned quickly which of them could be saved. The shallow hits, the ones in the limbs, could sometimes be cut out before the essence spread too deeply, if the surgeon was fast and the patient strong. She developed a rough method, a slash and flush with a solution of vinegar and crushed charcoal that she remembered from the Crimson Empire, where it had been used to draw certain toxins out of living tissue. It did not always work. But it worked often enough that when the fourth man opened his eyes, clear and human, and whispered thanks, she let herself feel something other than cold.

The light through the high windows turned amber, then red. The drum from the enemy camp had fallen silent sometime during the last hour, and the sudden quiet felt louder than the battle had.

"They have withdrawn," a runner announced from the doorway. "The first assault is broken. Captain Kaelen says we held the wall."

A ragged cheer went up from the wounded, thin and breathless, and Valeria felt her knees go suddenly weak. She leaned against the table, her hands trembling now that they no longer had a task, and discovered that she was crying quietly, without sound, tears running down her face and dripping onto the stained linen. She wiped them away with the back of her wrist and did not apologize to anyone.

"You should rest," Malakor said gently.

"In a moment."

She did not rest. She walked the length of the room checking each bed, adjusting a blanket here, whispering a word there, until she reached the far wall and found Alaric standing in the doorway, watching her.

He was spattered with dirt and other men's blood, a long shallow cut along his cheekbone, his sword still in its sheath but his hands rough with the grip of it. He looked exhausted and fiercely alive, and the sight of him standing upright and whole loosened something in her chest that she had not realized was clenched.

She crossed the room without a word and put her arms around him, heedless of the grime, and he held her hard enough that she felt the breath leave her.

"You are hurt," she said into his shoulder.

"A scratch." His voice was rough. "You are crying."

"I am relieved. It is different." She drew back to look at him, touching the cut on his cheek with her thumb. "The runner said you were laughing on the wall."

A slow, rueful smile crossed his face. "I was, I think. I do not know why. I stood on that wall and looked at all those men who came to take you away from me, and I realized I had never been so certain of anything in my life." He caught her hand and pressed it against his cheek. "It is a very peculiar feeling, to fight for something you actually want to keep."

"Do not let it make you reckless."

"I make no promises." But his eyes were gentle. "Tell me what you have seen. Kaelen says the enemy's crossbows are doing something unnatural."

She told him, briefly, and watched the warmth drain from his face. When she described the black threads, the changing nails, the madness, his jaw went rigid and his hand tightened around hers.

"They are using my own blood against us," he said slowly.

"Malakor believes so. He thinks they may have drawn it years ago." She hesitated. "Alaric, there is something else. I do not yet understand it, but Malakor wanted to speak with you when you came. He was quite insistent."

As if summoned, the alchemist appeared beside them, pale beneath his tiredness, a leather satchel clutched against his chest. He did not bother with courtesy.

"My lord. I have to tell you something, and I would ask you not to be angry until I have finished." He drew a breath. "The essence in those bolts is dangerous to any man. But I do not think it is equally dangerous to all. I have been examining the wounded, and I believe the curse in you is tied to the source of that blood by something more than simple kinship. A resonance. A call."

"Say it plainly."

"If one of those bolts strikes you, my lord, I do not think it will merely poison you." Malakor's voice was steady, but his fingers whitened on the satchel. "I think it will wake the thing in your heart. And without the moon to hold it in its cycle, I do not believe there is any physician in this world who could bring you back."

The silence that followed was absolute.

Valeria felt Alaric's hand go cold in hers, and she turned to look at his face. He was gazing at Malakor with an expression of terrible, quiet comprehension, like a man hearing the exact words of a sentence he had always suspected was written for him.

"Then Cedric knows," he said, almost gently. "That is why he made them. Not to break the walls. To draw me out."

"Yes, my lord."

Kaelen joined them within the quarter hour, summoned by a runner, his armor scored with fresh gouges and one gauntlet missing entirely. He listened to Malakor's account with his arms folded and his weight set on his heels, and when it was done, he was silent for a long moment.

"Then you do not go on the walls," he said finally.

"Captain."

"I am not asking, my lord." Kaelen's voice was flat, and Valeria heard the tremor of old fear beneath the discipline. "I have followed you into worse places than this. I will follow you into the next one. But I have watched you carry that curse for six years, and I will not stand by while Cedric turns it into a weapon aimed at your heart. Stay behind the gate. Command from the hall."

"And leave you to hold the wall alone?"

"I have held it all day without you." A faint, grim humor touched his mouth. "It was not you who burned the ladders, my lord. It was a very stubborn sergeant and forty archers who would rather die than let the south have their lord."

Alaric stared at him, and Valeria saw the struggle on his face, pride and love and the brutal arithmetic of command. "I cannot be seen to hide."

"You will not be hiding. You will be alive, which is a condition most of my men are praying you maintain." Kaelen stepped closer and lowered his voice. "They need you at the center, Alaric. Not at the edge. A commander who falls at the front is a hero for a day. A commander who holds the center is a victory for a year."

It was the first time Valeria had heard him use the name without the title, and she saw Alaric register it as well. For a heartbeat the three of them stood in a close, wordless triangle, the lines between lord and captain and healer dissolving into something simpler, three people who loved one another and were afraid.

"Very well," Alaric said at last, quietly. "I will command from the hall. But if the gate falls, I will not stay behind it."

"If the gate falls, my lord, I will be dead, and you may do as you please." Kaelen almost smiled. "Until then, humor an old soldier."

He saluted, a clipped and strangely tender gesture, and was gone before anyone could answer.

Alaric stood looking after him. Then he turned and drew Valeria against his side, and for a little while they simply stood together in the thick amber lamplight of the healing quarters, among the groaning and the sleeping and the dying, and let the war pause around them.

"If anything happens to me tonight," he said, very softly, so that no one else could hear, "I want you to take the western postern and go. Kaelen has horses waiting. Malakor knows the route to the mountain shelters. Do not look back for me."

"No."

"Valeria."

"No." She turned within his arm to face him, and her voice was quiet but absolutely immovable. "You asked me once not to decide what risks you could bear. I will ask you the same. I will not run while you stand at the gate. I have run from every cage I have ever been put in, and none of them were ever worth staying for. This one is."

He closed his eyes briefly, and when he opened them they were bright. "You are the most impossible woman I have ever met."

"You have a limited sample."

A laugh escaped him, short and cracked and entirely genuine, and he kissed her forehead hard. "Then I will have to be careful, since I do not intend to lose you to anyone's arrow, mine or Cedric's."

He did not say the other thing, the thing neither of them wished to give a name. But as he went back out into the corridor, to the hall and the maps and the long dark wait, Valeria felt the vial of Malakor's experimental tincture pressing against her wrist, small and hard and heavy as a promise she did not want to keep.

She went back to work because there was nothing else that she could do. Dorren slept under Malakor's syrup, the black threads halted for now at the edge of his collarbone, and she sat beside him for a time, wiping the sweat from his brow and listening to the slow, labored rhythm of his breath. He was perhaps forty. He had a daughter in the mountain shelters, he had told her a week ago, a girl who sang off-key and refused to be corrected. Valeria found herself hoping, with a fierceness that surprised her, that he would live long enough to be embarrassed by it.

Around her the room settled into its night rhythm, the low murmur of men too tired to sleep and too hurt to speak, the soft footsteps of the volunteers who carried water between the beds. She had learned something today that no council of war could have taught her. The war was not a map. It was this room, and the hundred rooms like it that Cedric's ambition would fill across the north if no one stopped him.

Somewhere beyond the walls, the drum began again, slow and patient, as though it had never stopped.

Outside the window, the last light bled out of the sky, and in the darkness beyond the valley, the enemy's fires began to kindle one by one.