The Valley of the Screaming Pipes had fallen into a deathly, unnatural silence. The wind, which usually howled through the porous stone pillars like a thousand mourning widows, had been choked off by a thick, sickly-sweet fog that tasted of scorched almonds and wet rot.
Jonin Kaji and Special Jonin Sora stood at the center of the formation, their bodies tensed. Between them, the rescued operative—a man whose ribs were a shattered cage—gasped for air that was increasingly becoming a poison.
Renza and Renju, at eleven years old, stood at the vanguard. They were back-to-back, a living paradox of storm and still-water. Renza's white hair was matted with the condensation of the toxic mist, his Stone trench knives held in a low, predatory guard. Renju's hand was steady on his chokutō, his dark blue eyes scanning the fog, not for a person, but for the ripple of chakra.
"The Salamander's elite," Sora whispered, her voice barely audible over the hiss of the gas. "This isn't just a scout. This is one of the Seven Heralds of the Rain."
From the murk, the figure materialized. He was tall, gaunt, and draped in a cloak that seemed to be made of wet leather. His respirator mask was a work of macabre art, shaped like the skull of a bottom-feeder. In his hands, he spun a kusarigama—a chain-sickle—with a speed that made the air hum.
"I am Ibuse's Tongue," the man hissed, his voice vibrating through the respirator. "You have taken something that belongs to the Salamander. For that, your lungs will be the first things to melt."
Kaji didn't wait. He knew that in a gas-filled environment, time was the enemy. Every heartbeat was a risk of the poison bypassing their temporary chakra-filters.
"Renza! Renju! Flank him! Sora and I will take the center!"
Kaji lunged, his single arm manifesting a massive blade of wind. Sora followed, a blur of needles and wire. But the Rain Ninja moved with a fluidity that mocked the laws of physics. He didn't retreat; he dissolved.
"Rain Style: Black Water Flicker!"
The Herald vanished into the mist, appearing instantly behind Renza. The sickle-blade whistled toward Renza's neck.
"Wind Step!"
Renza didn't even look back. He used the vacuum-push of his new technique to propel himself forward, the sickle-blade missing his hair by a fraction of an inch. As he moved, he flicked his wrist.
"Wind Release: Vacuum Blade!"
A crescent of air sliced through the fog. The Herald batted it away with the heavy weighted chain of his weapon as if it were a fly.
"Is that all the Leaf's 'prodigies' have?" the Herald mocked.
"Renju, now!" Renza roared.
Renju had been waiting in the Abyss. He hadn't moved an inch since the fight started, his heart rate lowered to the absolute minimum. Now, he exploded.
"Water Breathing, Second Form: Water Wheel!"
He didn't aim for the Herald. He aimed for the ground at the Herald's feet. The heavy, water-coated blade slammed into the wet silt, creating a massive splash of mud and water.
"Water Release: Wild Water Wave!"
Renju exhaled a high-pressure jet into the splash, turning the mud into a localized, blinding torrent.
In that split second of blindness, Renza was already in the air.
"TOTAL CONCENTRATION: BURST!"
Renza's lungs burned. This was the first time he was using the Burst while also filtering poison through his chakra. It felt like breathing liquid fire. He pushed past the pain.
"Wind Breathing, Third Form: Clean Storm Tree... VOID!"
He spun his trench knives in a vertical hurricane, creating a localized vacuum. The move was designed to suck the toxic gas away from his teammates, but it also acted as a gravitational pull. The Herald was yanked toward Renza, his cloak flapping violently.
Renza's knives crossed over the man's chest. Screeeech.
The blades didn't bite into flesh. They hit a hidden layer of chain-mail reinforced with chakra-reactive lead. The Herald laughed—a wet, metallic sound—and slammed his palm into Renza's solar plexus.
Renza was launched backward, his "Burst" shattering as he hit a stone pillar. He fell to the ground, coughing up blood that was beginning to turn a dark, bruised purple.
"The poison," Renza wheezed, his vision blurring. "It's... it's soaking through the skin."
"Renza!" Renju lunged to cover his friend, but the Herald's kusarigama was everywhere. The weighted chain wrapped around Renju's chokutō, the metal sparks flying as the two struggled for leverage.
"Your 'Breathing' is a fascinating mutation," the Herald hissed, leaning in close to Renju. "But it requires oxygen. And in this valley, I am the only one who decides who gets to breathe."
"Earth Release: Rising Spear!"
A voice boomed from the side. Jonin Kaji had slammed his hand into the earth. A jagged spike of rock erupted beneath the Herald, forcing him to release Renju and jump back.
Sora was already there, her hands weaving signs at a speed that left afterimages. "Fire Release: Phoenix Flower Jutsu!"
Small orbs of flame raced through the mist. The intention wasn't to hit the Herald—it was to burn the gas. A series of localized explosions rocked the valley, clearing the toxic fog for a few precious seconds.
"Renza! Renju! Formation Omega!" Kaji commanded, his face grim. "We have ten seconds before the gas resettles. End him now, or we die in this hole!"
Renju looked at Renza. The white-haired boy was struggling to stand, his hands shaking, his chest heaving. Renza looked back, and in that grey gaze, Renju saw the manic fire was still burning.
"Together," Renza rasped. "The Gale..."
"...and the Abyss," Renju finished.
They took the deepest breaths of their lives—breaths that would have killed a normal child.
"TOTAL CONCENTRATION: CONSTANT - OVERCLOCK!"
This was the forbidden threshold they had discussed in the orphanage years ago. It wasn't a burst; it was a total commitment of their chakra systems to their respiratory organs.
Renza's white hair began to glow with a faint, teal light. Renju's dark hair seemed to absorb the light around him, his skin turning a pale, ghostly blue.
They moved as one.
Renza used Wind Step to circle the Herald, creating a perimeter of Vacuum Blades. He wasn't aiming to hit; he was creating a "Wind Fence," trapping the Herald in a pocket of low-pressure air.
Renju entered the circle. He didn't use a flashy jutsu. He used Hidden Ripple on his blade, making it a silent, vibrating ghost.
"Water Breathing, Fourth Form: Striking Tide... Deep Pressure!"
Renju lunged. His blade moved in a series of fluid, heavy strikes. Every time the Herald tried to parry, Renza would flick a Vacuum Blade at the man's tendons, forcing him to shift his weight.
The Herald was a master, but he had never fought a "Calamity." He was fighting a storm that had a mind and a lake that had a sword.
"ENOUGH!" the Herald roared. He swung his kusarigama in a full 360-degree arc. "Rain Style: Black Rain Execution!"
Needles of hardened water erupted from the chain, flying in every direction.
"Gale Shield!" Renza roared, spinning his knives to deflect the needles. "Water Basin!" Renju shouted, creating a liquid wall to absorb the impact.
They weathered the storm. And in the moment of the Herald's follow-through, they struck the final chord.
Renza used his final Burst to propel himself behind the Herald. "Wind Breathing, First Form: Dust Whirlwind... SAVAGE!"
Renju stepped forward, his blade held low. "Water Breathing, Second Form: Water Wheel... REVERSE FLOW!"
The two forms met at the Herald's center. The wind pulled, and the water pushed. The vacuum created by Renza's knives held the man in place while the crushing pressure of Renju's vortex slammed into his chest.
The respirator mask shattered. The Herald's chest cavity collapsed under the sheer atmospheric pressure of the combined "Breathing" styles.
He didn't even have time to scream. He was simply... erased.
The Herald fell into the mud, a broken, silent heap.
----
The silence that followed was heavy. The "Overclock" ended, and the price was immediately extracted.
Renza fell first. He didn't just collapse; he went into a seizure. His lungs, unable to handle the sudden drop in pressure, began to fill with fluid. He clawed at his throat, his grey eyes rolling back into his head.
Renju wasn't much better. He was standing, but his nose, ears, and eyes were bleeding. The "Constant" state had put a strain on his heart that would leave permanent scarring. He stumbled toward Renza, his hands reaching out, but he fell inches short, his face hitting the wet silt.
"Medics..." Kaji's voice sounded miles away. "Sora... get the operative to the extraction point. I'll... I'll carry the boys."
Kaji looked down at his two students. They were eleven years old. They had just killed a Herald of the Rain—a feat that should have been impossible for anyone under the rank of Jonin. But they didn't look like legends. They looked like broken dolls, their bodies finally surrendering to the impossible demands of their own power.
"You fools," Kaji whispered, his voice cracking with a rare moment of emotion. "You're going to change the world... if you don't kill yourselves first."
They didn't wake up for a week.
When they did, the world had changed again. The "Map of the Poison Facilities" they had retrieved allowed Konoha to launch a massive counter-offensive. The war entered its most brutal, grinding phase.
Because of their injuries, Renza and Renju were pulled from the front lines for a long, grueling recovery. But they weren't sent back to the Academy. They were sent to a "Black Site" in the Land of Fire—a hidden training camp where the survivors of the war were honed into the elite.
For three years, they were ghosts.
They didn't write letters. They didn't see the sun. They spent every waking hour perfecting the "Overclock." They learned to breathe through the pain, through the blood, and through the guilt.
Age: 14
The rain was still falling. It always fell in this country.
Renza looked down at his hands. They were larger now, calloused and steady. The Stone trench knives were no longer "stolen tools"—they were extensions of his own bones. He wore a dark, sleeveless tactical vest, his muscles lean and hard like whipcord.
Renju stood beside him, his presence so still that a bird had landed on his shoulder, unaware that it was perched on a killer. He wore a traditional shinobi robe, modified for high-mobility, his dark blue eyes now possessing a terrifying, calm clarity.
"The Sannin are meeting Hanzo today," Renju said. His voice had dropped into a rich, steady baritone. "The 'Battle of the Dead' is about to begin."
Renza grinned, and for the first time in years, the manic light in his eyes was perfectly controlled. "Then we shouldn't keep them waiting. I've been holding my breath for three years, Renju."
"Then let it out, Renza," Renju replied, drawing his chokutō. The blade didn't whistle. It just... existed. "Let the world see what a Calamity looks like."
They vanished into the mist. They were no longer children. They were no longer Chunin. They were the legends the history books would forget to name, but the survivors would never forget to fear.