Jack's hand closed around the handle of the eighteenth-floor door, and the steel went cold enough to bite. The stairwell vanished beneath his feet, in weight, in certainty. Lily said something behind him. Dex shifted. Marcus drew a breath. The air seemed to thin. Then the swordsman's voice came from inside him, stripped of its usual frost.
"Before you face him," it said, "you need to see why I left him there alone."
The door turned, and the world became sunlit stone.
He stood in a training court high above green terraces and white walls, inside another life, seeing through the other Jack's eyes. The Duke faced him across the flagstones in dark practice robes, a wooden sword in one hand and a real one in the other. Wind moved the banners on the wall. Servants and guards had been dismissed. Even the birds seemed to know to keep away.
"I told you yesterday what waits beyond your sleep," the Duke said. "A dead version of me. A thing wearing my shape. If fate is cruel enough, one day you may have to cut him down."
The other Jack's throat was dry. "Then make me strong enough."
The Duke watched him a long moment, stern as ever, but with grief banked deep behind the eyes. "There are ways to raise a swordsman cleanly, over years. We do not have years." He lifted the true blade. Silver-white aura climbed it, then more colors rose inside the white, braided so finely they were almost hidden. Blue like stormlight. Deep green like river depths. A red line like banked coals. A dark shimmer that bent the eye. A crushing, invisible heaviness that made the stone under Jack's boots groan.
"What I carry was gathered across worlds," the Duke said quietly. "Not borrowed. Earned. Stolen from danger and hammered into one path. If I place a seed of it in you, it may widen your channels. It may also tear them apart."
"Do it," the other Jack said.
The Duke nodded once, as if he had been hoping for that answer, while hating it. "Sit. Bite this if your pride allows it."
Pride lasted only until the blade touched his spine.
The Duke drove aura into him with the flat of the sword, point by point down his back, chest, wrists, and throat. It felt like falling, drowning and being struck by lightning while buried under a mountain. The court went white around the edges. Jack's teeth clamped down on the strip of leather so hard blood filled his mouth. He felt foreign strengths forcing his body open from the inside, carving paths where none had been. The Duke did not let him flee it. One hand held the sword. The other locked on Jack's shoulder like iron.
"Breathe," the Duke ordered.
He did.
"Again."
He obeyed.
By the time it ended, he was on both knees, palms shaking against the stone. Thin threads of multicolored light moved under his skin and vanished. The Duke gave him exactly three breaths before tossing him a practice blade.
"Up," he said.
The other Jack staggered upright.
"Show me whether the pain was worth it."
They fought until sunset. He lost every exchange. He still touched aura by instinct only, a trembling edge around the wood. But each time the Duke struck him, the buried seed answered faster. Once, during the final clash, Jack's blade dragged downward with impossible weight and nearly tore the Duke's guard open.
The Duke's eyes sharpened. "Good. We'll do this again tomorrow."
Tomorrow arrived with a horn blast and a rider half dead in the saddle.
Mud and black blood striped the messenger's cloak. He barely made it through the gate before he fell. "Northwatch has broken," he gasped. "The dead crossed the river. Baron Tel is gone. Villages burned. They don't stop when cut. They stand back up unless the head is taken or the corruption burned."
The courtyard changed in a breath. Servants ran. Bells rang. Armor came off racks. The Duke turned to the captain of his household guard and began giving orders while squires sprinted to carry them.
Then he looked back at the other Jack.
"Bring your practice sword," he said. "War is a poor teacher. We use it anyway."
The march north became the rest of the boy's education.
At dawn he practiced footwork in wagon ruts while the army broke camp around him. At noon he learned to hold aura steady on horseback until his thighs quivered. At dusk the Duke corrected his grip over maps stained with rain and blood. When the columns halted, the Duke made him cut reeds in the dark by feel alone. When they moved again, he had to do it with numb fingers and no sleep.
The enemy appeared first as smoke on the horizon, then as fleeing people, then as shapes in the fields that did not run from cavalry. Dead farmers in torn work shirts. Dead soldiers with arrows still sticking from their throats. Great things stitched from too many bodies. Bone-plated beasts that shoved through shield walls. Every time the army stopped them, more came.
The other Jack took his Fifth Rank cutting through corpses at Gray Ford. He barely understood the moment it happened. One instant his aura was a thin skin on the blade. The next it ran clean and constant from hilt to tip, and three dead men fell apart before he felt the swing land.
The Duke did not praise him. He only said, "Good. Sixth before nightfall. Keep your shoulder down."
He did.
The Duke's methods grew harsher as the front worsened. On the seventh day he fed Jack bitter elixir that set his nerves on fire and made him spar until he vomited. On the tenth he struck his blade a hundred times into the boy's guard until Jack either learned to shift weight like deep water or lost both arms. On the twelfth he finally explained the buried colors.
"Do not chase them separately," he said as they rode beside a column of pikes. "This one world names me a Tenth Rank swordsman, but that is only the language it has. What I gave you is not storm, nor shadow, nor burden, nor flame. It is mine. All of it serving one cut. If you divide yourself chasing tricks, you die mediocre. If you make one road from all of it, you might live long enough to matter."
That night undead cavalry hit the camp in the rain.
Jack woke to screaming horses and white flashes in the dark. He came out of his tent with a sword in hand and saw the Duke split a charging rider and mount in the same stroke, the aura edge carving a glowing line through both. Dead men leaped the trench. Jack met one, then six. Something in him aligned. Weight flowed into his arms, speed into his feet, steadiness into his breathing. His blade stopped shaking.
By sunrise he was Sixth Rank.
No one celebrated. They burned the bodies and marched south, because the line had broken again.
Weeks blurred into retreat, skirmish, and instruction. Whole towns were emptied before the army reached them. Fields stood ready for harvest with no one left to cut them. The Duke trained him between disasters as if that, too, were a form of defiance. Seventh Rank came on a hillside of blackened wheat when he learned to let the buried heaviness drop through his blade and break bone armor instead of glancing from it.
At Eastrun, an old sword-master from the capital watched him finish a monstrous standard-bearer in four perfect cuts and stared as if he'd seen a comet strike the road.
"How old are you?" the master asked.
The other Jack, chest heaving, could barely answer.
The old man looked to the Duke. "If the court had a month left for gossip, every academy in the kingdom would be tearing itself apart over this boy."
The Duke wiped black blood from his sword. "Then it is well the dead have spared us the noise."
Even he could not hide the thin edge of pride.
The kingdom kept shrinking.
By the time they were driven back to the lands around the Duke's residence, the army no longer marched in ordered splendor. It limped. Banners were reduced to knots of cloth. Armor was patched with leather and wire. Men slept standing and woke at the sound of flies. The great house on the hill still stood, all pale stone and broad terraces, but smoke stained the horizon in every direction. Refugees packed the lower courtyards. The last of the kingdom's strength gathered there because there was nowhere else left to gather.
On the morning the dead came to claim it, the other Jack reached Eighth Rank on the practice terrace before dawn.
He almost laughed when it happened. The aura no longer merely coated his sword. It sang through him, a bright, controlled pressure from heel to shoulder. For one breath he felt he could cut the whole sky open.
The Duke lowered his own blade. "Good," he said.
"Good?" Jack echoed, breathless.
"Ninth before sunset," the Duke replied. "Do not grow pleased with yourself yet."
Then the horns sounded from the outer fields.
The final battle spread below the residence in long bands of mud, torn grass, and broken walls. Household knights, royal remnants, village militias, servants with spears, everyone who could stand in a line. They all stood there under a cold gray sky. The dead came without drums. Their sound was feet in wet earth and the clatter of bone. Too many. Always too many.
The other Jack fought in the left-center under his house banner until he could no longer remember how many things he had cut. He saw Marcus-sized men dragged down, saw horse teams collapse screaming, saw archers fire until corpses reached the stakes and began climbing over each other. The Duke moved where the line bent worst, a one-man answer to impossible numbers, his sword leaving crescents of white and hidden color in the air.
When a bone-armored giant broke through the breach near the orchard wall, Jack met it because no one else was close enough. The creature towered above him, rib plates grown over its chest like a second skeleton, arms ending in hooked spears of living bone. It slammed one hook down. Jack slid aside. The second caught his shoulder and spun him half around.
Pain.
He heard the Duke's voice from a hundred drills.
One road. One cut.
Jack planted his feet. All the buried colors the Duke had forced into him, all the marching lessons and sleepless corrections and battlefield scraps of understanding, locked together. His aura flared; complete. The next stroke went up through the giant's leg, across its trunk, and out the far shoulder in one rising line. The monster split apart.
The soldiers nearest him shouted in disbelief.
Ninth Rank hit like a gate blowing open.
For half a second he understood why kingdoms wrote songs about swordsmen.
Then the cheering died, because the dead in front ranks stopped began moving aside for something.
The air changed first. A pressure Jack knew too well even before he saw the figure walking through the corridor the horde made. Familiar height. Familiar face. The healed bite at the neck. Red eyes lit from within like coals buried under ash.
The Zombie King had come himself.
Across the ruined field, the Duke saw him and went very still.
"No," the other Jack said at once, already moving toward him.
The Duke intercepted him with one arm across the chest. Up close, Jack saw what the battle had cost: a cut down the Duke's thigh, black blood drying on one sleeve, exhaustion hidden only by discipline.
"Listen to me," the Duke said.
"I can fight. I'm Ninth."
"You are," the Duke said, and for the first time all war, sternness dropped from his face. He only looked like a father who had run out of time. "And if this were only my world, I would keep you here beside me."
The Zombie King kept walking. Bodies parted around him like leaves swept by the wind.
The Duke gripped Jack's shoulder hard enough to hurt. "But you are not only of this world. He has found your scent through the dream-roads. If you stay and fall here, he will follow the thread into the place that made you. The other world needs you."
Jack stared at him. "Then come with me."
A sad smile, brief as a knife-flash. "Some men do not leave their dead to strangers." He looked past Jack, toward the house, the terraces, the burning fields. Then back to the approaching King. "Ninth I could force into you. The last step cannot be taught that way."
"I'm not leaving you." Jack hated how young he sounded.
"You are," the Duke said. "Because I am ordering it. Because whether you were born to me or only borrowed to me, you are still my son enough for that to stand." He leaned closer. "Wake. Carry this strength back. When you meet what wears my face, do not hesitate."
The other Jack's eyes burned. "I can still help."
"You already did." The Duke drew him in, touched forehead to forehead for one fierce second, then shoved two fingers blazing with aura against the center of Jack's chest.
The world lurched.
Sleep took him like a fall.
The last thing he saw was the Duke stepping forward alone from the ragged front of the army, sword in hand, to meet the Zombie King in the trampled field below his own home.
Jack tore his hand off the eighteenth-floor handle and stumbled back into the stairwell, breathing smoke that was not there. Lily caught his arm before he fell. The grief in his chest was not entirely his own.
Now he knew what waited behind the door.
And why the swordsman had never heeded his call.