Chapter 1: Lessons in Blood
The air in the training hall tasted of old blood and ozone. It was a taste Killua Zoldyck knew as well as his own heartbeat. The black stone walls, polished smooth by generations of violence, swallowed the light from the single wrought-iron brazier. In the deep gloom, the only clear things were the silver glint of his father’s eyes and the shifting planes of his own hands, held loose and ready.
Silva moved without a sound. One moment he was a statue, a monolith of muscle and tradition carved into the shadows. The next, the air itself fractured as his fist found Killua’s ribs.
The impact wasn’t a crack, but a deep, internal shudder. It drove the wind from Killua’s lungs in a grunt, sent him skidding back three paces on the slick stone. His boots screeched against the floor.
“Pathetic.” Silva’s voice was a low rumble, like stone grinding against stone. He didn’t reset his stance. He just stood there, a monument to perfected lethality. “You hesitated.”
Killua straightened, a sharp, jarring motion. He dragged the back of his hand across his mouth. The coppery tang of blood bloomed on his tongue. He could feel the bruise already flowering deep under his skin, a morbid blossom of his father’s disappointment.
A spark, blue-white and feral, jumped from his index finger to his thumb. Then another. The hum of his Nen filled the space between them, a static-electricity buzz that made the fine hairs on his arms stand up. It smelled like a lightning strike about to happen.
He smiled. It wasn’t a pleasant thing. It was all teeth and old resentment. “Yeah,” he said, his voice deceptively light. “I did. Funny, that.” He let the electricity dance across his knuckles, painting his fist in jagged, shifting light. “I learned hesitation from watching you, old man.”
Silva didn’t flinch. The accusation hung in the ozonized air. For a fraction of a second, the only sound was the distant, rhythmic clink-clink-clink of a servant sharpening blades in some connected antechamber.
“Explain,” Silva commanded. It wasn’t a question.
“You want me to be the perfect weapon. Smooth. Efficient. No wasted motion, no extra thought.” Killua rolled his shoulders, the electricity subsiding into a shimmering aura around him. “But every job you ever took, every contract you ever fulfilled… it was for the family. The legacy. The Zoldyck name.” He took a step forward. “That’s a thought. That’s a hesitation. ‘Is this good for the brand?’ ‘Does this align with the family’s long-term interests?’ You hesitate right there, at the threshold of the act. You just call it calculation.”
Silva remained silent, but the temperature in the room seemed to drop. Killua pressed on.
“I hesitate because I’m wondering if I should. Not if I can. There’s a difference. You never taught me that difference. I had to learn it from… someone else.” He didn’t say the name. Gon’s name would be a vulnerability here, a piece of his soft underbelly exposed to the frost.
“Sentiment,” Silva spat the word like a poison. “It makes you slow. It makes you weak. It gets you killed.”
“Maybe.” Killua shrugged. The casual gesture was a rebellion in itself. “But it also makes the silence afterwards a little easier to bear. You ever think about that? What’s left after the money’s deposited and the target’s been scrubbed from the registry? You just sit in your study with your ledgers and your quiet, empty house.”
For the first time, something flickered in Silva’s impassive gaze. Not anger. Something colder, more distant. Recognition, perhaps, of a solitude he’d never allowed himself to name.
“You left,” Silva said, the words final. “You walked away from your birthright. From your training. From this.” He gestured vaguely at the hall, the hall that contained their entire history in its scarred walls. “And now you come back, not to reclaim it, but to… what? Critique it?”
“I came back because you summoned me,” Killua said flatly. “And I was curious. Wanted to see if the air still tasted the same.” He looked around the cavernous room, at the notches in the stone where a blow had landed too hard, at the faint, dark stains that no amount of scrubbing could remove. “It does.”
The silence stretched. The fight had gone out of the moment, leaving only the uncomfortable, familiar strain between them. Silva finally turned, walking slowly towards the brazier. The firelight caught the strands of silver in his hair.
“There is a job,” he said, his back to Killua. “A complex one. High risk, higher reward. It requires finesse, not just force. Strategic dissolution of a corporate entity, not just a body.”
Killua didn’t move. “And?”
“And the client requested you by name.”
That got his attention. Killua’s eyes narrowed. “Who?”
“That is part of the complexity. The offer came through secure, anonymized channels. The fee is… astronomical. Enough to retire on. Truly retire.” Silva glanced over his shoulder, his profile sharp against the flame. “They knew things. About your methods. Your preferences. Your history of… independent action.”
A cold thread of suspicion wound its way down Killua’s spine. This wasn’t a normal contract. This was bait. A beautifully gilded, exquisitely tempting trap.
“You’re suggesting I take it.”
“I am conveying the offer,” Silva corrected, turning fully to face him. The fire cast long, dancing shadows across his face, making him look both older and more dangerous. “The decision is yours. It always has been.”
Killua almost laughed. The irony was so thick he could chew it. His father, the bastion of family duty, was presenting him with a golden ticket to permanent exile. A final, clean break, paid for by a mystery admirer.
“Why tell me?” Killua asked. “Why not just hand it off to Illumi or some other perfect, unhesitating tool?”
Silva studied him for a long moment. The clink-clink-clink from the other room had stopped. The hall was utterly still.
“Because,” Silva said, his voice quieter now, almost lost in the vastness, “it is a job that requires a conscience. A burden I cannot lift for you.” He paused. “And because I am… curious. To see what you choose.”
The words hung there, a challenge and an admission all at once. Killua looked at his father, really looked, and saw not just the imposing head of the Zoldyck family, but a man standing in a room of ghosts, offering his most wayward ghost a key to the outside world.
The electricity at Killua’s fingertips had died completely. The only hum left was the low thrum of his own pulse in his ears. He thought of the bruise on his ribs, a gift from his father. He thought of empty studies and silent houses. He thought of a boy with a sunny smile who taught him the weight of a choice.
He didn’t give an answer. Not yet. He just turned and walked towards the arched doorway leading out of the hall, his footsteps echoing in the stagnant air.
“I’ll think about it,” he said, without looking back.
The oppressive weight of the training hall lifted the moment Killua stepped into the corridor. The air was cooler, smelling of damp earth and aged wood instead of blood and ozone. His ribs throbbed with every breath, a sharp reminder of his father’s lesson. Hesitation. A part of him, the part carved out by Zoldyck hands, agreed. The other part, the part that belonged to him alone, knew it was a lie.
He moved through the labyrinthine halls on silent feet, a ghost in his own childhood home. Portraits of stern ancestors watched him pass, their painted eyes seeming to track his betrayal. He ignored them. He’d been ignoring them for years.
His room was as he’d left it a lifetime ago—spartan, clean, a cell disguised as a bedroom. He didn’t bother with the light. Moonlight bled through the high, narrow window, painting a silver stripe across the bare floorboards. He sat on the edge of the bed, the old frame groaning softly under his weight.
A job that requires a conscience.
Silva’s words echoed. It was the closest thing to a compliment, or maybe just an assessment of a useful defect. Killua let out a slow breath, his mind already dissecting the offer. Anonymous client. Exorbitant fee. Specific request for him. It stank. It stank of Illumi’s convoluted schemes, or some rival family’s attempt to draw the Zoldycks into a war, or—a colder thought—a trap built by someone who knew him from the outside. Someone who knew about Gon.
His pocket buzzed.
He fished out the sleek, encrypted phone, a tool of his independent trade. A single line of text glowed on the screen, from an untraceable number.
The cedar vault. Midnight. Come alone. First payment is there. Consider it a gesture of good faith.
He stared at the words. The cedar vault was an old, disused storage shed on the western edge of the estate grounds, half-collapsed and forgotten. How did they get a package onto Zoldyck land? More importantly, why drop it there? To prove they could? To test his curiosity?
It was reckless. Stupid. A textbook lure.
Killua’s thumbs moved over the screen. Who is this? he typed.
The reply was immediate. The client. Midnight. Or don’t. The offer expires with the moon.
He deleted the messages, the phone purging them permanently. He leaned back, the cool wall against his neck. They were watching. They knew he was here, knew he’d just spoken to Silva. The timing was too perfect. This wasn’t just a job offer; it was a demonstration of power, of infiltration.
He stood up, the pain in his side a dull ache. He changed out of his training clothes into dark, soft-fitting gear—matte black pants, a tight grey shirt, supple shoes that made no sound. He was a shadow dressing as a shadow.
He didn’t leave through the main doors. Instead, he opened his window, the ancient latch giving way without a sound. The night air was crisp, scented with pine and distant frost. He dropped three stories, catching the sill of a lower floor, then a carved gargoyle, then the ground, his descent a series of fluid, silent movements. The estate guards, with their predictable patrol routes, were like statues to him. He flowed past their perimeter, a breeze they barely registered.
The woods were dark, the path to the western edge overgrown. He moved through the underbrush not as an intruder, but as a part of it. Every snapped twig would be a failure, so none snapped. His Nen hugged his skin, dampening his presence, blurring his outline. It was second nature.
The cedar vault came into view, a sagging silhouette against the star-filled sky. The roof had partially caved in, and the once-proud Zoldyck crest above the door was cracked and bleached by weather. It looked exactly like a place where things were forgotten.
He paused at the tree line, senses extended. No heartbeat but the scuttling of small night creatures. No scent of another person. No foreign Nen. Just decay and rot.
Still, he waited five full minutes, perfectly still.
Nothing.
He crossed the clearing, the dead grass crunching faintly underfoot. The door hung askew on one rusted hinge. He slipped inside.
Moonlight poured through the broken roof, illuminating drifting motes of dust. The space was empty save for a few rotten crates… and a small, polished metal case sitting in the center of the dirt floor, directly in a pool of silver light. It looked utterly alien in the grime.
He knelt before it, not touching it. No visible locks. No markings. He reached out, not with his hand, but with a thread of his Nen, a microscopic antenna of electricity. He probed the surface. No feedback. No aura. Just… inert metal.
Cautiously, he flipped the latches. They opened with a soft click.
Inside, nestled on black foam, was a stack of untraceable platinum cards, worth a fortune. And beside them, a single, old-fashioned photographic print. He picked it up.
The image showed a modern, soaring skyscraper of glass and steel, a corporate spire piercing a blue sky. At its base, the photo was marked with a small, precise ‘X’ in red ink. Scribbled on the back, in a tight, efficient script, were four words: Heaven does not forget.
A coldness seeped into his gut, colder than any Zoldyck dungeon. He dropped the photo like it had burned him. It fluttered back into the case.
He stared at the cards, the building, the words. This wasn’t just a job. It was a message. A correction. A recall notice from a life he thought he’d left behind.
Footsteps sounded outside, soft but unmistakable. Not an animal. Too heavy.
Killua snapped the case shut, melting back into the darkest corner of the vault just as a figure filled the broken doorway, silhouetted by the moonlight. The figure was tall, unfamiliar, and stood with a casual, waiting posture.
“Tick-tock, Zoldyck,” a smooth,陌生 voice said into the darkness. “The moon won’t wait forever.”
Killua didn’t move from the shadows. The figure in the doorway was a cut-out against the night, featureless. The voice was smooth, cultured, without a recognizable accent—the kind of voice engineered to be forgettable.
“You’re standing in my light,” Killua said, his own voice flat. “Makes it hard to admire the payment.”
A soft chuckle. The figure took one deliberate step inside, then another, moving out of the silver backlight. Details resolved. A man, late thirties, with the bland, pleasant face of a mid-level corporate manager. His hair was neatly trimmed, his dark overcoat expensive but unremarkable. He looked like someone who scheduled meetings for a living. Only his eyes were wrong. They held a kind of vacant, calculated stillness, like a doll’s eyes that had seen too much.
“My apologies. Atmosphere is important, don’t you think?” the man said, his hands resting casually in his coat pockets. “This place… it has a certain gravity. A history of endings.”
“Who are you?” Killua asked. He remained in the corner, letting the darkness pool around him. His Nen was a contained storm, ready to arc out in a microsecond.
“A facilitator. You can call me Mr. Reed. It’s not my name, but it’s serviceable.” Reed glanced at the metal case. “I see you found the retainer. And the photograph.”
“Heaven does not forget,” Killua quoted, the words tasting like ash. “Cute. What’s it mean?”
“It means the past is a ledger, Mr. Zoldyck. And some accounts are never closed, merely… dormant.” Reed tilted his head. “The building in that photo is the Velnium Tower. Headquarters of Veridian Technologies. A progressive little firm doing cutting-edge work in bio-aural resonance. Very philanthropic. Very public.”
“And the ‘X’?”
“Is where you will find the account that needs closing. The target is the company’s founder and CEO, Aris Thorne.”
Killua let the name hang. He’d heard it. Everyone had. Aris Thorne was a contemporary titan, a tech visionary who gave TED talks about unifying human consciousness. He was practically a saint in the business pages.
“You want me to assassinate a global celebrity,” Killua stated. “In one of the most secure private buildings on the continent. For money.”
“For the money, yes. But also for the truth.” Reed’s smile was thin. “Aris Thorne is not a philanthropist. He is a thief. And what he stole… belongs to a legacy you walked away from. The Heaven’s Arena legacy.”
The air in the vault seemed to grow thinner. Killua felt the old scar on his palm tingle, a phantom pain from a thousand lightning-fast strikes in that endless tower. He’d left that behind, too. Or so he’d thought.
“Heaven’s Arena is a fighting ring,” Killua said, his voice dangerously soft. “Not a bank.”
“It is a repository,” Reed corrected. “Of techniques. Of lineage. Of a very specific, refined type of Nen potential. For generations, the most promising fighters—those who displayed unique, heritable abilities—were cataloged. Studied. Their aural signatures recorded. It was an informal project, run by certain Arena stewards with long-term vision.”
Killua’s mind raced, connecting jagged pieces. His own family had its own breeding program for assassins. This was a distorted mirror of that. “Thorne stole this catalog.”
“He acquired the research illegally. He didn’t want the data for study. He wanted it for synthesis. Veridian’s flagship project isn’t medical. It’s militarized Nen infusion. They’re trying to mass-produce specialized Nen users. To build an army of… well, of fighters with abilities not their own. The project’s internal code name is ‘Anthology.’” Reed’s doll’s eyes fixed on Killua. “Your profile is in there. Your brother Illumi’s is a prized specimen. The Kurta clan’s Scarlet Eyes are a particularly sought-after entry.”
A cold fury began to boil in Killua’s veins, quiet and precise. This wasn’t just a hit. It was a contamination. A violation of the very essence of what made a fighter who they were.
“Why me?” Killua asked. “If you know all this, you have resources. Send a squad. Bomb the lab.”
“Crude. And ineffective. Thorne is paranoid. The core server holding the ‘Anthology’ data is aural-locked. It requires a living, complex Nen signature to access—a key. Thorne’s own signature is part of it. The other part… is from a masterclass fighter whose data was amongst the first stolen. It requires a duel. A genuine, high-level Nen duel, to create the resonant frequency needed to unlock the system for deletion.”
“So you need someone who can force him to fight seriously. And kill him in the process.”
“We need someone who can win,” Reed said simply. “Thorne is not a businessman who took up a hobby. He is a monster who built a business to fund his hobby. He has absorbed, or mimicked, facets of the very abilities he cataloged. Fighting him will be… unique. The client believes you are uniquely suited. Your versatility. Your speed. Your experience with unconventional Nen. And your personal stake.”
“I don’t have a stake.”
“Don’t you?” Reed’s eyebrow twitched, the first crack in the porcelain facade. “He has your data, Killua. He has the blueprint of your potential. He may already have tried to replicate it. How does it feel, knowing there might be hollowed-out puppets out there, moving with a cheap copy of your lightning?”
The image was a visceral poison. Killua saw it: blank-eyed men and women, twitching with stolen electricity. A mockery of everything he’d fought to own for himself.
“Who’s the client?” Killua pushed.
“The remaining stewards of the true Heaven’s Arena legacy. Those who wish to burn the library before the wrong people read the books. They are shadows, like you. They have no public face. Only a desire to correct a fatal mistake.” Reed finally pulled a hand from his pocket. He held a simple data chip between his gloved fingers. “This contains everything: floor plans, security rotations, Thorne’s known daily routines, and the hypothesized nature of his absorbed abilities. The retainer is yours regardless. Take the chip only if you’re in.”
Killua looked from the bland, terrifying man to the metal case full of money. It was more than a job. It was a targeted undoing. A chance to erase a piece of his past that was being used to poison the future. He thought of Silva’s words in the training hall, the weight of a conscience.
He stepped out of the shadow.
In one fluid motion, he scooped up the metal case and plucked the data chip from Reed’s fingers. His own hand didn’t brush the man’s glove.
“I’ll look at the files,” Killua said.
“That’s all we ask.” Reed nodded, his empty eyes somehow conveying satisfaction. “The moon is setting, Mr. Zoldyck. The timeline is compressed. Veridian is nearing a breakthrough. We’ll be in touch to coordinate delivery.”
“Don’t call me. I’ll call you.” Killua turned, the case heavy in his hand.
“One more thing,” Reed said. Killua paused, not looking back. “Thorne knows the catalog is a target. He’s expecting interference. From us, or from the families whose legacies he’s plundered. Your family is on that list. The moment you engage, the Zoldycks become a variable in his equation. He may try to pre-empt that variable.”
A warning. Or a further manipulation. Killua stored it, analyzed it.
“Let him try,” Killua said, and melted into the deeper darkness of the woods, leaving the facilitator alone in the crumbling vault with the falling moon.