The summons came on a morning when the valley fog still clung to the hedgerows like mourning crepe. Sera Vale found the messenger at the gate of the cottage where she had spent seven years learning the quiet commerce of roots and simples: a boy no older than twelve, booted in mud to the knee, leading a black mare whose tack bore the stamped hawk of House Ashworth. The boy held out a scroll sealed in pale green wax, and his hand trembled.
Sera cracked the seal with her thumbnail. The handwriting within was precise, aristocratic, and entirely without warmth.
Lady Sera Vale is commanded to present herself at Thornhaven Castle without delay. The matter concerns a wasting sickness affecting Lady Mira Ashworth. Lord Caelan Ashworth will receive her in the east gallery upon her arrival.
Commanded. As though she were a conscript.
The cottage door opened behind her. Master Aldric, her teacher, stood framed in the doorway with soil on his knuckles and a look of slow, unsurprised grief.
"You knew," Sera said.
"I suspected." Aldric stepped aside so she might pass within, though he did not invite her to sit. The cottage interior smelled of drying chamomile and the iron tang of a kettle left too long on the hob. "The Ashworths have been circling this valley for three generations. The only question was when one of them would think to bite."
"And you trained me anyway."
"I trained you because you were born to this work, child. Whether or not the work ever brought you to that castle." He set a jar of dried feverfew into her satchel without asking. "You will not cure their sickness. You know that."
"I know no such thing." Sera fastened the satchel and slung it across her shoulder. The leather creaked, well-worn, molded to her frame by four years of carrying it. "No one has ever brought me a case I could not name."
"That is not the same thing."
She left him standing in the doorway. The boy with the mare was already mounted and waiting, his face schooled into the careful blankness of country children raised near powerful houses. Sera swung up behind him on the black mare and felt the beast's flanks bunch and roll beneath her, a rhythm older than any castle summons.
The road to Thornhaven wound upward through a forest of ash and hawthorn. The trees grew close here, their branches laced overhead so that the morning light fell in broken coins across the bridle path. Sera counted the mile markers as they passed: granite obelisks crusted with lichen, each one carved with the hawk-and-thorn sigil of the ruling house. At the seventh marker the boy spoke without turning his head.
"My mam said not to speak to you on the road, m'lady. But my mam also said the Ashworth girl has been fading since the last frost. They tried three physicians from the capital. None of them could find the sickness in her blood."
"What did they find?"
"Nothing." The boy's voice dropped. "That's the worst part. She wastes, and they find nothing."
Sera said nothing. The mare's hooves struck the packed earth in a steady cadence, and somewhere ahead, hidden by the canopy, a wood pigeon called twice and fell silent.
Thornhaven Castle announced itself long before its walls came into view. First the smell: wet stone and iron and, beneath it, something older, a vegetable sweetness like crushed roses left too long in a closed room. Then the sound of the river that ran beneath its foundations, a low, continuous hush that seemed to swallow other noises. Then the towers themselves, breaking the tree cover in a sudden brutal geometry of black slate and pale granite, their windows catching the morning sun like scattered coins.
The boy halted the mare at the outer ward. A steward in Ashworth livery stepped forward to receive her, a tall man with a face like folded parchment, who bowed once and led her inward without a word. Sera followed. Her boots left prints on stone that had been swept only hours before, and she noticed, with the professional eye of a girl raised among herbs and simples, that the walls of the outer passage were damp in places where they should have been dry, sweating a thin moisture that smelled faintly of loam.
The east gallery occupied the entire eastern face of the keep. Sera stepped through its arched doorway and stopped.
Glass rose on either side of her in a single sweeping wall, twenty feet high and eighty paces long, looking out over a rose garden gone wild and the river valley beyond. The light that fell through that glass was the color of weak honey, diffused by clouds that had begun to gather in the west. At the far end of the gallery, two waited with their backs to her.
The man she recognized from the wax. Lord Caelan Ashworth stood a head taller than his sister, his shoulders squared beneath a coat of dark wool that had been brushed until it gleamed. His hair was the color of beaten iron and cut short at the nape in the military fashion. He turned at the sound of her boots, and Sera saw his face for the first time: a long, northern face, sharp-boned, with eyes the grey of meltwater and a mouth that had learned early to hold itself still.
Beside him, Mira Ashworth. A woman perhaps ten years his senior, dressed in the severe cut of a scholar's robe, her dark hair pinned at the base of her skull with a single silver clasp. Her eyes, when they settled on Sera, were a brown so deep they bordered on black, and they held the particular calm of someone who had learned to keep her fear very close.
"So." Caelan's voice was quiet, measured, and entirely without inflection. "You are the herbalist."
"I am." Sera did not curtsy. She had been commanded, not invited. "Where is the patient?"
Caelan's mouth tightened. He glanced toward his sister, who gave a small nod, and then he stepped aside to reveal what lay at the center of the gallery.
A girl, no older than sixteen, lay upon a daybed drawn up against the glass. A quilt of grey wool had been tucked around her to the chin, though the gallery was not cold. Her hands rested outside the coverlet, pale as peeled willow, and her face, turned toward the wild roses beyond the glass, held the translucence of wax left too long in the sun. A white linen cloth had been folded and laid across her forehead, and beneath it her skin carried a faint, uneven sheen, as though she burned from within.
Sera crossed the gallery in eight measured paces, knelt beside the daybed, and set two fingers to the girl's wrist.
The pulse fluttered there like a moth trapped in a lantern. Sera closed her eyes and counted. Too fast. Too thin. She lifted the cloth from the girl's forehead and pressed the back of her hand to the girl's cheek. Hot, but not with fever. A different heat, deeper, as though something beneath the skin had kindled and would not let go.
Sera drew the quilt down an inch. The girl's neck showed a tracery of veins just beneath the skin, blue-black, standing out as though drawn in ink. Sera bent close, sniffed the air above the girl's collar, and caught it again: that vegetable sweetness, crushed roses left too long, the same scent she had smelled in the outer passage.
She sat back on her heels. Behind her, Caelan Ashworth had not moved from his position by the far window. Mira had taken two steps closer, her hands folded into the sleeves of her robe.
"What do you see?" Mira asked.
Sera looked up at her. "How long has she been like this?"
"Three months." Caelan's voice came from behind his sister, still level. "Since the last frost. She was strong before that. Rode. Hunted. Sang in the chapel choir." A pause. "She cannot stand unaided now. She has not spoken in nine days."
Sera turned back to the girl on the daybed and laid her palm flat against the girl's sternum. Through the linen of her shift she felt the heart working there, quick and desperate. Beneath it, deeper, something else. A second rhythm, faint as a thread of smoke, pulling against the first.
She withdrew her hand.
"You were right to send for me," Sera said. "No physician of the capital will name what is in her. It is not in her blood."
Caelan took a step forward. "Then where?"
Sera did not answer at once. She looked again at the girl's face, at the veins in her throat, at the faint, unnatural sheen on her skin. Then she looked through the glass behind the daybed, out across the wild rose garden, and saw, for the first time, what grew at its center.
A single tree. Thorned, black-barked, taller than any tree she had seen in the valley forests, rising from a thicket of briars that had climbed and crawled over what had once been a stone fountain. Its leaves were the deep, wet green of blood freshly drawn, and where the morning light fell through the clouds, those leaves caught it and burned a dull, unwholesome red.
Sera's breath left her. Her hands, still resting on her knees, curled into slow fists.
"The heart-tree," she said.
Behind her, Mira Ashworth drew a sharp breath, and Caelan's shadow, thrown long across the gallery floor, shifted as though its owner had taken a single involuntary step and caught himself.
Sera turned. Both Ashworths stood very still. Mira's hands had come out of her sleeves, and her fingers were pressed white at the tips against the fabric of her robe. Caelan's face had not changed, but the muscles along his jaw had set themselves into a single hard line.
"You know what it is," Sera said.
"We know what it was." Mira's voice had gone careful. Crisp. The voice of a woman holding herself in check by the edges. "The Ashworths kept it as a relic. A monument to a treaty older than the house itself."
"A treaty." Sera rose to her feet. The satchel on her hip felt suddenly heavy. "Your sister lies three months dying in the same gallery that overlooks a tree older than your line, and you call it a monument."
Caelan took a step toward her. His eyes, when they met hers, were no longer meltwater grey. They had darkened to the color of wet slate.
"The tree was bound," he said. "Beneath the foundations of this castle, bound by an oath sworn in blood by my grandfather's grandfather. It could not wake. It could not call. It could do nothing but root and grow and remember."
"Until now."
"Until the last frost." Caelan stopped an arm's length from her. He did not raise his voice. He did not need to. "Something in the binding failed. The tree woke. The sickness began in my sister on the same morning that the first red bud opened on the lowest branch."
Sera looked once more at the girl on the daybed. The girl's eyes had half opened. They were the color of embers in a bed of ash, a deep and luminous gold that had no place in a human face, and they were fixed not on Sera, not on her brother, not on the gallery or the glass, but on the dark shape of the heart-tree beyond the window.
Sera felt the air in the gallery shift, as though a door had been opened somewhere far below them, and a breath of that crushed-rose sweetness rose from the floorboards to meet her.
The girl's lips moved. No sound came out. But Sera, who had been trained from childhood to read the small movements of the dying, read the word plainly.
Mother.
Mira's lips shaped the word, and the gallery held its breath. Sera's hands began to shake. She pressed them flat against her thighs, a trick Maren had taught her in the herb-house when the tinctures boiled over and the steam made the room swim. Hold still. Hold still and look.
"The binding is breaking," Sera said. Her voice came out wrong, too high, too thin, the voice of the girl she had been before the summer sickness took her mother. She swallowed and tried again, lower, steadier, in the register she had learned to use with grieving families. "The tree is waking. Your sister is the vessel."
Caelan did not flinch at the word. He had known, then. Perhaps he had always known. Sera wondered how long he had carried it, this knowledge shaped like a knife under the ribs, and whether anyone had ever offered to help him set it down.
"What can be done?" he asked. "There must be something. An old cure. An old rite. Mira has read every book in the archive. There must be a line, a verse, a binding in the other direction."
Sera looked at the girl on the daybed. The girl's hand lay limp beside the blue glass phial, the fingers half curled as though they had been reaching for something in the last moment before sleep took her. Sera thought of the patients she had sat with in the village, the grandmother with the lung-rot who had gripped her wrist so hard the bones ached for a week after, the little boy with the river fever who had died whispering a name no one in the village recognized. The dying reached. It was what the dying did. They reached for the hand of anyone who was fool enough to come close.
She stepped toward the daybed. Caelan's hand came up, not to stop her but to warn her, the way a man might warn another man of a bog. She ignored him. She knelt beside the daybed and put two fingers to the pulse beneath the girl's jaw.
The skin was warm. Too warm. Not the dry heat of a fever but the damp warmth of a thing that had been sitting in new-turned earth. Beneath her fingertips the pulse did not beat so much as thrum, a low and patient vibration like the purr of a cat pressed against a windowpane in summer. It was the rhythm of a living thing, but it was not the rhythm of a human one.
Sera lifted her gaze to the girl's face. The golden eyes had closed again, but the lashes were not the fine brown of Mira Ashworth's. They were longer, thicker, the color of dried heather, and they lay against cheeks that had begun to take on a faint and rosy undertone, as though the blood beneath the skin had remembered something the mind had forgotten.
"The queen woke in your sister at the last frost," Sera said softly. "But the queen did not choose your sister. The queen was called, and the call was answered by the nearest vessel. The nearest vessel was Mira."
Caelan went very still. "There are others," he said. "The blood runs in our line. There are cousins in the northern holds. There are children in the cadet branch."
Sera shook her head. "It is too late for the others. The call has been answered. The bond is forming. To break it now would be to break your sister with it." She paused, and in the pause she heard her own words as though someone else were speaking them, someone older, someone who had been waiting a long time in a dark and thorny place for the right pair of ears to listen. "Unless the vessel is willing. Unless the vessel consents. Then the queen can be drawn out, and the host can be saved."
Caelan dropped to his knees beside the daybed. He took his sister's hand in both of his, and for a moment he was not the man who had ridden into the village with his hunter's bow and his grandfather's seal. He was only a boy whose sister was dying, and his face was the face of every boy who has ever watched someone he loved slip beyond the reach of his hands.
"She is not awake," he said. "She cannot consent."
"She does not need to be awake," Sera answered. "She needs to be present. And she needs to be willing. I can go to her, into the place where she walks, and I can ask her."
Caelan's eyes came up to meet hers. They were the slate-grey again, and in them she saw the same war she had seen in the village square, the war between the man he had been raised to be and the man the summer was making of him. The man he had been raised to be said that this was blasphemy, that the Thorn Queen was a thing to be cut down and burned, that the blood oath was a price paid in full by his great-grandfather and owed no more. The man the summer was making of him said that his sister was dying on a daybed in a gallery that smelled of roses and dust, and that the kneeling girl with the dark braid was the only one who had offered to help.
"What do you need?" he asked.
Sera thought of the herb-house. She thought of Maren, with her grey braid and her earth-brown hands, who had taught her that every plant was a door and every door could be opened from either side. She thought of the bundle of dried thornwood that hung above the kitchen hearth, the thorns longer than her thumb, the wood black and bitter and older than the village itself.
"I need to go to the tree," she said. "I need to go alone. And I need to be there before the sun sets, or the bond will finish forming, and your sister will be lost."
Caelan released his sister's hand. He stood, and the motion was slow, the motion of a man who has just set down a weight he had been carrying for a long time and is not yet sure his legs will hold him. He looked once more at the girl on the daybed, at the long heather lashes, at the faint rose in her cheeks, at the lips that had shaped the word Mother without making a sound.
"I will take you to the path," he said. "But I will not let you go alone."
Sera almost refused. The refusal was on her tongue, the old refusal, the one she had been sharpening against her own ribs for three years. She had walked alone into every dark wood. She had knelt alone beside every sickbed. She had carried every burden alone, because alone was the only way she knew to keep the people she helped from becoming the people she hurt.
But the word the girl had shaped was not help . The word was mother . And Sera knew, with a certainty that sat in her chest like a stone, that the path to the heart-tree was not a path she could walk twice, and that if she walked it without a witness, the walk would be the end of the girl she had been when she left the village.
"Stay behind me," she said. "Do not speak unless a door is opened for you. And if you see my eyes change, you run. You do not hesitate. You do not look back. You run until you reach the gallery, and then you bar the door."
Caelan nodded. He did not argue. He did not ask why. He only turned toward the gallery door, and Sera followed, and behind them the girl on the daybed turned her face toward the window and smiled in her sleep, and the smile was not the smile of Mira Ashworth. The smile was older, and it was full of thorns, and it was aimed at the dark shape of the tree beyond the glass.
The path to the heart-tree began at the edge of the orchard, in a place where the apple trees grew so close together that their branches knit into a roof that let in no light. Sera had not been to the orchard. She had not known there was an orchard. But when they stepped through the gallery door and down the spiraling stair, and out into the courtyard, and through the gate in the western wall, the path was waiting for her as though it had been waiting all along.
The air changed as they walked. The crushed-rose sweetness of the gallery gave way to a deeper scent, the scent of turned earth after a long rain, of woodsmoke from a fire that has been burning for a hundred years, of something green and bitter that Sera could not name but recognized in the same way she recognized her own heartbeat. The thorns on the apple trees grew longer as they went, and darker, and they began to curl inward, away from the path, as though the path itself were a wound in the wood that the thorns did not want to touch.
Sera's satchel bounced against her hip. Inside it were the three things she had not let herself think about since the gallery. The first was a bundle of dried thornwood, cut from the tree above Maren's hearth, wrapped in linen to keep the thorns from catching on everything she owned. The second was a small clay jar of the salve she had made for the Thornwood fever, the one that smelled of pine resin and the fat of the grey squirrels that lived in the high branches. The third was a sprig of the silverleaf that grew only in the places where the old oaks had been struck by lightning, three leaves on a stem no longer than her little finger, and worth more than everything else in her satchel combined.
She had taken the silverleaf without asking. She had taken it the morning she left the village, when she had stood in the western meadow and watched the sun come up over the hills, and she had known, with the same certainty that had told her Mira Ashworth was dying, that she was going to need it. The knowing had not been hers. The knowing had been the Thorn Queen's, filtered through the bond she had not yet understood, the bond that had been forming in the dark of the gallery while the girl on the daybed whispered the word Mother to the glass.
The path opened into a clearing. The heart-tree stood at the center of the clearing, and the clearing was not a clearing at all. It was a wound. The earth around the tree was black, as though it had been burned, and the roots of the tree rose out of the black earth like the fingers of a hand reaching up from a grave. The trunk was wider than the gallery was long, and the bark was the color of dried blood, and the thorns that grew from it were longer than Sera's forearm, and they moved.
Sera stopped. Caelan stopped behind her. The air in the clearing was thick, and it pressed against her skin like a hand, and the scent of green and bitter filled her mouth until she could taste it on the back of her tongue.
"Hold," said a voice. The voice came from everywhere and nowhere. It was cold, and it echoed, and it was the voice of an old man who had been speaking for a very long time and had forgotten how to stop. "Vessel. You were not expected."
Sera's hand found the bundle of thornwood in her satchel. "I am not the vessel," she said. "I am the one who was called to help the vessel."
"There is no help," the voice said. "There is only the waking, and the walking, and the wearing of the crown."
Sera stepped forward. The thorns on the tree turned toward her, slowly, the way a sunflower turns toward the sun, and she felt the air around her grow colder with every step. "I have the thornwood," she said. "I have the silverleaf. And I have the consent of the host, or I will have it before the sun sets."
The voice laughed. The laugh was the sound of ice cracking on a deep lake, and it was followed by a silence so complete that Sera could hear the blood moving in her own veins.
"Consent," the voice said. "The queen does not ask for consent. The queen takes what is offered, and what is not offered, and what is hidden in the dark places where the host believes no one can see."
"Then teach me how to ask," Sera said. "Teach me how to go to her, and how to bring her back, and I will owe you a debt that the Ashworth line will pay for a hundred generations."
The voice was silent for a long time. The thorns on the tree stopped moving. The wind in the clearing died, and the only sound was the sound of Sera's own breathing, and Caelan's breathing behind her, and the low and patient thrum of the bond that was forming in the gallery three hundred yards away.
"My name is Hollow," the voice said at last. "I was a man once, before the queen bound me to the tree. I was a servant of the Heart-Tree, and I was faithful, and the queen rewarded my faithfulness by taking my name and my face and my voice and leaving me here to speak to the ones who come after." A pause, long and cold. "I have been speaking for a very long time, vessel. I am tired of speaking to the ones who do not listen."
"I am listening," Sera said.
"Then listen well," Hollow said. "The queen wakes in the host. The host does not wake in the queen. To reach the host, you must go into the place where the host walks. To go into that place, you must open the door from the inside. To open the door from the inside, you must cut your palm and press the blood to the bark and speak the name the queen gave you before the queen was the queen."
Sera's hand tightened on the bundle of thornwood. "I do not know the name."
"You do," Hollow said. "You have always known it. You have known it since the day the old woman in the herb-house put the bundle of thornwood over her hearth and told you never to touch it. You have known it since the first time you knelt beside a sickbed and felt the room go cold. You have known it since the morning you woke in the western meadow and took the silverleaf without asking."
The thorns on the tree began to move again. They turned toward Sera, and they turned toward Caelan, and they turned toward the black earth at the base of the trunk, where a shape was beginning to rise out of the ground. The shape was tall, and it was thin, and it was made of shadow and the smell of roses, and it had no face, and its voice, when it spoke, was the voice of cracking ice, and it said a name that Sera had never heard spoken aloud, a name that was not the name her mother had given her, a name that was older than the village, older than the castle, older than the line of the Ashworths, a name that was hers, and had always been hers, and had been waiting for her in the dark.
The shadow-wraith's hand, if it was a hand, reached for her wrist. The cold of it bit through the linen of her sleeve and into the skin beneath, and the touch left a mark, a blackened mark like the brand of a smith, and the mark burned, and Sera heard her own voice, or the voice of the one the shadow had named, answer from somewhere far inside her chest, and the answer was yes , and the word was not her word, and the yes was not her yes, and the clearing filled with the sound of cracking ice and the scent of roses and the low and patient thrum of the heart-tree waking.
The mark on Sera's wrist was black, and the skin around it was colder than the air, and the cold spread up her arm and into her shoulder and along her collarbone, and the thorns on the heart-tree turned to face her, and the clearing smelled of roses and of frost, and the shadow-wraith stood above the two of them with its faceless head bowed, and it spoke again, and this time Sera heard the words not as sound but as pressure, as weight, as something laid against the inside of her skull like a stone laid against a door.
She said, in a voice that was hers and was not hers, "I am here."
Caelan pulled her behind him. His shoulder was warm against her cheek, and the warmth was a shock, and she felt the cold inside her flinch from it. The thorns on the tree did not flinch. They grew another inch, and another, and the shadow-wraith turned its head, slowly, the way a fox turns its head toward a sound in the grass.
Caelan's sword was in his hand. Sera had not seen him draw it. The blade was not bright. It was the color of old bone, and it was etched with the same twisting lines that were on the lintel above Mira's door, and the lines on the blade were moving, very slightly, the way the lines on the lintel had moved in the torchlight.
"Sera," he said. He did not turn around. His voice was steady, but his shoulder was trembling against her cheek. "Stay behind me. Whatever you hear, whatever you feel, do not say yes again."
She could not have promised. The yes was still inside her, warm, and it sat in the center of her chest the way a coal sits in the center of a fire, and the cold that was spreading from the mark on her wrist came up against it and stopped, and the two of them sat inside her, cold and warm, and she did not know which one was hers.
The shadow-wraith raised its hand again. The cold came off it in waves, and where the cold touched the grass, the grass turned white, and where the white grass bent, it cracked, and the cracking was a sound like a boot on thin ice.
Caelan stepped forward. The blade met the shadow's hand, and the sound it made was not the sound of metal on shadow but the sound of two notes that did not belong in the same chord, and the air between them shuddered, and Sera felt the shudder in her teeth.
He held the blade steady. His arms were shaking. The shadow leaned into the blade, slowly, and the cold came through the metal and into his hands, and Sera watched the skin of his knuckles go white, and then gray, and then the color of the dead roses in the garden above.
"Caelan," she said.
He did not answer. The shadow leaned closer, and Sera saw, in the place where its face should have been, a light, faint and green and very deep, the color of a lantern seen through three layers of ice.
The light was looking at her. She felt it looking at her. It felt like being looked at by something that had forgotten what eyes were for.
Then the clearing filled with another sound, and the sound was a voice, and the voice was Hollow's, and it came from inside the trunk of the heart-tree, and it said, in the slow and cracked tone of a thing that had not spoken aloud in a very long time, "She remembers you."
The shadow-wraith stopped leaning.
"Sister," Hollow said, from the wood. The word was not a word. It was a sound shaped like a word, and the shape of it bent the air, and the thorns on the tree went still. "Sister. She remembers you. She remembers the garden. She remembers the child."
The shadow-wraith's head turned toward the trunk.
Caelan did not lower the blade. Sera heard him breathing through his nose, in and out, in and out, the way a man breathes when he is holding something heavy and is afraid that if he lets his breath go, the thing will fall.
The shadow-wraith spoke. Its voice was not the voice of cracking ice this time. It was thinner, and it was farther away, and it said, "She was not to remember."
"She was always to remember," Hollow said. "You know this. You knew this when you planted the seal. You knew this when you set the bargain. You knew this when you made the Ashworths into a lock."
The shadow-wraith was silent for a long time. The cold in the clearing did not lessen, but it changed, and the change was the change from a blade held steady to a blade being turned slowly in a hand, and the turning of it made Sera's stomach fold.
"It was not the bargain," the shadow said. "The bargain was silence."
"The bargain was memory," Hollow said. "Memory, held in trust. Memory, to be returned when the seal cracked. The seal has cracked. You cracked it. You sent her to the meadow. You sent her to the silverleaf."
The shadow's head turned toward Sera. The green light in its face was brighter now, and it was the color of the mark on her wrist, and the mark on her wrist was hot, suddenly, hot enough that she gasped, and her gasp made Caelan turn, and when he turned, the shadow moved.
It did not move toward Sera. It moved toward the trunk. It bent, and its faceless head came close to the bark, and it pressed itself against the wood, and the wood groaned, and a crack ran up the trunk from the place where it touched, and through the crack came a smell that was not the smell of roses and was not the smell of frost, and the smell was older than both.
Sera knew the smell. She had smelled it once, in the western meadow, on the morning she had knelt beside the silverleaf and taken it without asking. She had smelled it again, last night, in the garden above, when she had opened her eyes and seen the castle and the roses and the sky the color of a bruise.
It was the smell of the heart-tree, and the smell of the heart-tree was the smell of her own blood, and the smell was saying, very quietly, very patiently, very close to her ear, come home .
Caelan pulled her back. He pulled her hard, and his hand on her arm was warm, and the warmth pushed the smell away for a moment, and in the moment she could think, she thought, he is burning for me, he is freezing for me, he is holding me together with his hands and his blood and I do not know how to tell him what that costs .
The shadow-wraith rose from the trunk. It turned, and it looked down at Caelan, and the green light in its face was the light of something that had been made to wait a very long time and was not willing to wait any longer.
"Step aside," it said. The voice was the voice of cracking ice again, and the voice was louder, and the thorns on the tree shivered.
Caelan did not step aside.
"I made an oath," he said. His voice was not steady any longer. It was the voice of a man who was holding a sword against the cold and could feel the cold coming through the blade and into his wrists and along his arms. "I made an oath to the house of Ashworth. I made an oath to my sister. I am not stepping aside."
"The oath is broken," the shadow said. "The line is ended. The lock is cracked. There is nothing in this clearing that holds you to the blade."
"There is her," Caelan said.
He did not look back at Sera when he said it. He did not need to. The word her sat in the air between them, and Sera felt it land in her chest, beside the coal, beside the cold, and it did not go out, and the warmth of it was the only warmth in the clearing that was not the warmth of the heart-tree.
The shadow-wraith was still. The green light in its face flickered, and the flickering was the flickering of a thing that was not sure.
Then it said, "Then you will go into the wood with her."
It raised its hand. The thorns on the heart-tree began to move, and they moved in a pattern that Sera knew, and the pattern was the pattern of the lines on Caelan's blade and the lines on Mira's lintel, and the pattern was the pattern of the words Hollow had spoken in the tower room, and the pattern was closing, and the clearing was getting smaller, and the heart-tree was getting larger.
Caelan swung the blade. The swing was clumsy, and the blade went wide, and Sera saw the reason for the clumsiness: his hands, from the wrists down, were gray, and the gray had reached the second knuckles, and the gray was the gray of the roses in the garden above.
The blade passed through the shadow-wraith's shoulder. Where it passed, the shadow broke, and through the break Sera saw, for one instant, not shadow but a face, and the face was a woman's face, and the face was her own face, and the face was older, and the face was tired, and the face was looking at her with an expression she had never seen on any face and recognized immediately, because it was the expression of a person who has been waiting a very long time to be allowed to rest.
Then the shadow closed, and the face was gone.
Hollow's voice came again, from the trunk, and this time it was closer, and it was louder, and it was the voice of a thing that was afraid.
"The seal is gone," Hollow said. "The bargain is open. She is calling, and the heart-tree is answering, and the answering will not stop. You must choose now, daughter. You must choose now, lock-bearer. You must choose, or the court will wake, and the court will wake hungry."
Sera looked at the heart-tree. The mark on her wrist was pulsing, and the pulse was in time with the slow thrum of the trunk, and the thrum was in time with her own heart, and her own heart was beating in time with something she had never heard before, and the something was singing, low and patient, in a language she did not know but understood perfectly.
She looked at Caelan. His hands were gray to the second knuckles, and the gray was climbing. His face was set, and the set of it was the set of a man who had made a decision and was not going to unmake it. The blade in his hand was shaking, but he was not.
She thought, if I say yes, the court wakes. If I say no, the seal holds, and the seal holds only by killing him, and I will not kill him, I will not, I would rather go into the wood myself than watch his hands go gray to the elbows.
She thought, if I say yes, I go into the heart-tree, and the heart-tree takes me, and the thorns close, and I am not Sera any longer. I am the Thorn Queen, and the Thorn Queen wakes, and Mira said the waking would be the end of the court and the end of the seal and the end of the bargain, and I do not know what that means.
She thought, if I say yes, I save him, and I save the village, and I save the roses that are not yet dead, and I lose myself, and the loss of myself is the price, and the price is what Hollow was trying to tell me in the tower room, and the price is what Mira has been trying to tell me since she opened the book in the western meadow.