Chapter Text
July 25, 2557
Mantle’s Approach, over Earth
The Broadsword died with its nose buried in Forerunner metal.
For several seconds after the crash, the fighter still tried to be a machine. Emergency lights pulsed red through the fractured cockpit. Fire-control systems clicked through dead routines. The left engine coughed twice, spat blue-white sparks across the deck, and went quiet. A damage alarm stuttered in the background until Cortana killed it with the digital equivalent of slamming a door.
Then all that remained was the ship around them.
Mantle’s Approach breathed in the walls.
Not literally. The thing was not alive in any sense Lauren wanted to grant it. But the interior carried motion through every surface, tiny adjustments and deep resonances traveling through the black metal floor beneath her boots. Orange light ran through seams in slow patterns. Somewhere far ahead, the Composer charged, and the entire ship answered in pulses.
John stood beside the wreckage with the HAVOK frame locked onto his back.
The warhead made him look even broader, a green armored figure carrying the ugliest answer humanity had left. Its indicator glowed steady red against the frame. Secure. Armed but not primed. Portable, if one had been genetically altered, armored in half a ton of Mjolnir, and sufficiently stubborn to consider a nuclear device infantry equipment.
Lauren had a battle rifle in hand, two spare magazines, a sidearm, and the quiet, bright certainty that this ship wanted them dead in a way no battlefield had ever wanted anything.
Cortana appeared in John’s HUD and in Lauren’s shared tactical overlay as a small blue icon, too faint at the edges. She was back in armor systems, not scattered across the dead Broadsword, but Lauren could still feel the strain in the timing of her markers. A half-second delay here. A route that flickered before settling there. Not enough to fail them yet.
Enough to make every step sharp.
“Keep scanning for the Composer,” John said. “We’ll figure it out along the way.”
Cortana made a sound that wanted to be a laugh and failed into static. “That is less a plan than a personality profile.”
Lauren glanced toward the corridor ahead. “It’s been working.”
“Define working.”
“We are not dead.”
“That bar is buried under the floor.”
John moved.
The corridor beyond the crash site narrowed immediately, the walls closing into an angular passage that did not look damaged by the fighter’s impact. Mantle’s Approach had taken a Broadsword through its outer hull, allowed it to crash inside, and then simply resumed being enormous. That bothered Lauren. Ships were supposed to care when something punched into them. Human ships screamed. Covenant ships bled plasma and smoke. This one adjusted.
The first Prometheans waited in the next room.
A Knight stood on the far platform with a light rifle held low, motionless as a statue. Crawlers crouched along the floor near its feet. Two Watchers hovered behind it. The chamber itself had two doors, one left, one right, both sealed. Above them, Forerunner structures folded inward around a central shaft that dropped out of sight.
The Knight’s face opened.
The fight began.
John took the center, slower than normal only because the HAVOK changed his profile and because he was unwilling to let the warhead strike anything it did not need to. Lauren went left, climbing a raised platform and firing down into the first Watcher before it shielded the Crawlers. The drone twisted away from her first burst. John’s fire caught its wing. Lauren’s second shot broke its center. It burst into hardlight and vanished.
Crawlers came in a rush.
They skittered low, heads splitting into weapons, claws clicking against the deck. Lauren put two down before they reached the incline. One leaped toward John’s back. She killed it midair. John drove forward, putting enough fire into the Knight’s shield to force it backward.
The second Watcher tried to lift the damaged Crawler parts from the floor and reassemble them.
Lauren shot the emitter out of its underside.
“Not today.”
Cortana’s voice came thin but pleased. “That was efficient.”
“It was rude.”
“I’ll allow both.”
The Knight teleported.
John pivoted toward the displacement.
Lauren did not. She watched the door behind them instead.
The Knight appeared there, exactly where the HAVOK would be exposed if it managed to rush him from the rear. Lauren’s rifle was already up. Her burst struck its chest before the hardlight finished knitting around it. John turned and hit it with the sticky detonator. The round clung to its torso.
It teleported again.
The detonator went with it.
John triggered the charge as soon as the Knight reappeared near the center platform. The blast threw hardlight fragments across the room. The Knight dissolved.
The doors opened.
Both of them.
Cortana’s route marker flickered between left and right.
“Left,” she said.
The right door’s light turned blue.
Then orange.
Then blue again.
Cortana’s voice sharpened. “No. Left. Definitely left.”
Lauren looked at the right door. “That one is trying too hard to look useful.”
John went left.
The left passage led to a vertical drop. Not a simple shaft, but a gravity lift embedded in a hexagonal tunnel of blue light. The beam moved downward slowly, as if inviting them to step in and trust it not to become a blender halfway through. Below, Lauren could see platforms passing in layers.
“I recommend entering the doorway to your left,” Cortana said, and there was a forced brightness in it that made the line sound like a patch over a crack.
John stepped into the lift.
Lauren followed close enough that the beam caught both of them in the same pull.
Gravity changed.
They dropped without falling, armor suspended in the column, the HAVOK frame steady across John’s back. For a few seconds the ship slid past them in vertical ribbons: walls, dormant portals, empty Promethean cradles, hardlight bridges too far away to reach. The beam hummed through armor and bone.
Cortana’s voice began in the background.
Not through the comm exactly.
Around it.
“I won’t leave you. I promise.”
Lauren’s gaze snapped toward John.
The line repeated, overlapped by another Cortana, younger in tone, or perhaps only less broken.
“I will always take care of you.”
John’s helmet did not turn.
But Lauren saw the grip of his right hand tighten around the rifle.
Cortana’s present voice cut in a second later, strained with embarrassment and effort. “Ignore that.”
“No,” Lauren said.
The lift carried them down.
Cortana did not answer.
Lauren kept her voice low. “We’re not ignoring you.”
“That wasn’t me.”
John said, “It was.”
Cortana went quiet.
The lift released them onto a lower platform and the conversation died under incoming fire.
The next room had no floor at the center, only a large chasm with a platform at the far side and a Forerunner activation port rising from it like a narrow blade. Bridges spanned the void in broken segments. Some were hardlight. Some were solid metal. Some looked solid and were probably lying. Promethean Crawlers moved along the far walls in clusters, and a Knight with a scattershot stood near the port as if it had been waiting for them.
Cortana’s voice recovered its mission shape.
“I detected an energy signature up ahead. I think it’s a transit system like on Requiem. Find a way to access it.”
John moved onto the first bridge.
Lauren kept to his left, watching the chasm and the walls. She did not like the geometry. Too many elevation changes. Too many portal frames. Too much open space beneath. The Composer’s pulse shook the room every few seconds, faint but growing, like a countdown pretending to be structural vibration.
The Crawlers came from the walls first.
Lauren took them.
John took the Knight.
The Knight fired its scattershot and the blast chewed through a section of hardlight bridge near John’s boots. The bridge flickered. He jumped to the next segment before it failed. Lauren shot a Crawler off the wall, then another, then dropped to one knee as a light rifle beam cut across the platform.
A second Knight had appeared behind the activation port.
“Two Knights,” she said.
“I see them.”
The first one teleported toward her.
It reappeared on the near bridge with blade raised. Lauren stepped back, let the blade pass, and fired into its side while John’s burst struck from the opposite angle. The Knight staggered. The bridge beneath it flickered. Lauren shot the hardlight anchor.
The bridge vanished.
The Knight fell into the chasm, phasing too late to save itself. It dissolved into the ship’s light before it hit anything Lauren could see.
The second Knight shielded itself with a Watcher that unfolded from behind the port.
Cortana marked the Watcher. “Drone.”
Lauren shot it once. Missed.
The Watcher darted behind the port.
John threw a grenade over the top of the structure. The Watcher moved to shield the Knight and caught the blast instead. Lauren finished it as it spun out of cover. Without the drone, the Knight lasted five more seconds.
They reached the port.
John set one hand against the activation surface.
Cortana interfaced through his gauntlet.
The room answered too quickly.
A portal opened at the far end of the chamber. Then another behind them. Then one on the ceiling. Then all three collapsed, leaving a single ring glowing ahead.
Cortana’s icon turned white at the edges.
“I’ll try to route us to the Composer. Put me in the system.”
John pulled the chip.
Lauren’s hand came up before he inserted it into the port.
She did not touch the chip.
Only the edge of the console.
“Say if it starts pulling.”
Cortana’s voice came from the chip, quieter. “I may not know until it does.”
“Then we’ll say it for you.”
For a moment, Cortana said nothing.
John inserted her into the system.
Cortana appeared above the port, blue and immediately distorted. Her figure stretched into a thin line, snapped back, then condensed into a glowing sphere that flickered white and red. The room dimmed around her. The ship noticed.
The Didact’s voice entered like pressure through the walls.
“Is this the secret you have kept from me? This evolved ancilla?”
Cortana’s sphere flared.
“Didact knows I’m in the system. Hurry. Go!”
The portal ahead widened.
John grabbed the chip as Cortana compressed herself back into it, but a thin filament of blue light remained connected to the port for a fraction too long. He pulled harder. It snapped. Cortana returned to his armor in a rush that made both HUDs flash red and purple.
Lauren felt the static in her teeth.
“Cortana?”
“Go.”
They went.
The portal spat them into a hallway full of Crawlers.
No staging. No eerie pause. Just claws and gun-heads and blue spines charging straight at them from the far end. The hall was narrow, with raised side ledges and a low central path that forced everything into a funnel. That helped. For ten seconds.
Then more Crawlers poured from vents overhead.
Lauren took the upper ledges. John took the central line. The HAVOK frame forced him to keep his turns compact, so she became the sweep around him, clearing anything that tried to climb above his field of fire. Her battle rifle clicked empty. She swapped magazines by muscle memory, kicked a Crawler off the ledge, and fired into its core as it hit the floor.
Cortana’s voice came broken.
“Portal…”
A new ring opened at the end of the hallway.
The Didact spoke over her.
“I sense your malfunctioning companion, human. And yet, she eludes me.”
John’s answer was a burst of rifle fire that cleared the last Crawler from the path.
Lauren shot one more as it tried to crawl up the wall beside the portal.
They crossed through.
The next room was worse.
It was a large chamber with several portal frames suspended at different levels and bridges leading in looping routes between them. Some portals were active. Some were dead. Some opened and closed as soon as Cortana looked at them. Promethean Crawlers swarmed from the lower platforms while Knights held the upper angles. Watchers drifted like vultures near each portal, shielding exits, repairing units, and making every route feel like a trick.
Cortana’s voice came in pieces.
“Can’t fight… Didact… and… myself… simultaneously. Opening another portal…”
The wrong portal opened first.
It led to an empty armory.
John stepped through because it was the only open route. Lauren followed.
They emerged in a small chamber lined with Forerunner weapons suspended in hardlight racks: suppressors, light rifles, scattershots, pulse grenades, binary rifles. No enemies. No Composer. No obvious exit except the portal behind them, which collapsed as soon as they cleared it.
Lauren looked around. “This is not the Composer.”
John said, “No.”
Cortana’s channel went strange.
For a few seconds, the sender tag in Lauren’s HUD did not read CORTANA.
It read DR. CATHERINE HALSEY.
Lauren froze.
John turned his helmet slightly.
Cortana’s voice came over the channel, but it carried overlapping threads beneath it: Halsey’s cadence, Cortana’s fear, something small and furious trying to claw its way out of both.
“I’m sorry. I can’t control what my processes are doing. The stronger threads keep reprioritizing themselves over me.”
In the background, simultaneous and distorted:
“John, our mother needs us.”
Lauren’s hands tightened around the new light rifle she had taken from a rack.
John’s voice was controlled. “What about the Didact?”
Cortana’s avatar flickered faintly above a weapon rack, not fully formed, barely a blue outline with too many edges.
“I can’t hide much longer. I’ll try to move you to the Composer again.”
She vanished.
For one second, the armory held only the hum of Forerunner weapons and the sound of their breathing.
Lauren looked at John.
He did not look away from the dead portal frame.
“Our mother,” she said quietly.
The words tasted wrong.
John’s voice came low. “Halsey.”
“Yes.”
“She’s not.”
Lauren knew what he meant.
Not mother.
Not like that.
Not enough to own the word.
Cortana’s voice returned, weaker. “Portal open. Far side of the room.”
A new portal appeared at the opposite wall.
John started toward it.
Lauren followed.
Halfway across the armory, she stopped.
A Grunt was hiding behind a weapon rack.
Not a Promethean. Not an active threat. An Unggoy in Covenant armor, somehow dragged into this chamber by an earlier portal misfire or retreat, shaking so hard its methane tank clicked faintly against the wall. Its plasma pistol lay on the floor half a meter from its hand. It stared at Lauren’s lavender armor and John’s green, eyes wide behind the mask.
“No shoot,” it whispered. “No shoot. Lost. Bad shiny place. Very bad.”
John had already seen it.
His rifle did not rise.
Lauren pointed to the far corner away from the portal. “Stay there.”
The Grunt blinked.
“Stay,” she repeated. “Don’t touch the weapon.”
The Unggoy shoved both hands into the air. “No touch! No touch ever! Weapon is bad friend!”
Lauren moved on.
John said nothing.
Cortana, after a moment, said faintly, “You realize it may tell others.”
Lauren stepped through the portal. “Good. Maybe they’ll avoid the room.”
The portal deposited them back into the larger chamber.
This time, not at the Composer.
John’s helmet turned left, then right. “Where are you?”
Cortana’s voice came from everywhere and nowhere.
“The Didact’s cloaking the Composer from me.”
Promethean troops arrived before she finished the sentence.
“Reinforcements,” Cortana said. “Hold them off while I locate the Composer.”
The chamber began to fill.
Crawlers came first, more than before, an endless wave pouring from lower portals and vents along the bridges. Knights appeared on upper platforms and fired down. Watchers shielded the portal frames. Hardlight turrets began forming in the air, first one, then two, then more.
John moved to the center bridge and set the HAVOK frame behind a Forerunner pillar.
Lauren planted herself beside it.
The rule became clear without words.
No enemy touches the nuke.
For the next several minutes, the chamber was all motion.
John took the Knights as they appeared, drawing fire, breaking shields, forcing teleports. Lauren held the nuke’s perimeter, killing Crawlers as they swarmed the bridge and shooting Watchers before they could shield anything near the HAVOK. Cortana’s markers came and went, sometimes accurate, sometimes delayed. When the markers failed, John and Lauren fell back on each other. Old rhythm. Older than Requiem. Older than Cortana’s understanding of it. A pattern Halsey had seen through glass and tried to flatten into a file.
A Crawler leaped toward the HAVOK.
Lauren caught it by the neck frame and threw it into another, then shot both before they recovered.
A Knight teleported onto the bridge behind John.
He ducked before Lauren called it.
Her shot went over his shoulder and into the Knight’s open face.
He stood and finished it.
No thank you.
No need.
Cortana’s voice broke through the chaos. “I’m taking control of the local defense turrets.”
Two beam turrets materialized above the bridges, not Promethean hostile this time. Their hardlight frames charged slowly, painfully slowly, then opened fire on the Crawler waves. The beams swept across the lower platforms, cutting Crawlers in half before they reached the bridges. The pressure eased by one degree.
Lauren saw Cortana’s blue image flicker near the far portal.
Not stable.
Present.
“I’ve got it,” Cortana said. “I locked him out of the system, but I don’t know for how long.”
John retrieved the HAVOK.
Lauren covered him.
The route across the bridge toward Cortana’s portal opened under the turrets’ fire, hardlight beams clearing Crawlers as they ran.
Cortana’s image stood beside the portal frame, flickering badly.
“Pick me up and I’ll take us to the Composer.”
John reached her and took the chip from the terminal cradle. His hand closed around it.
For a moment, Cortana did not compress properly.
Her avatar remained there, faint, looking at him.
Then at Lauren.
“You think I’ll just let you go off all by yourself?” she said.
Lauren’s voice softened despite the fire around them. “We weren’t planning to.”
Cortana’s expression changed.
The line had not been meant as banter. Not fully. It had come from one of the random loops Halopedia would have called a combat stall line, but here it landed differently because Lauren was there and Cortana heard the answer.
Not alone.
Not this time.
Cortana compressed into the chip.
John slotted her back into his armor.
She opened the portal.
“The Composer’s on the other side of this portal.”
They ran down the bridge as the defense turrets carved paths through the Crawlers around them.
The portal swallowed them.
They emerged onto a platform with a gravity lift rising ahead several stories through a blue-white shaft. Beyond the lift, a long ramp led toward a man cannon, and beyond that, distant through layers of open structure, Lauren could see something vast and bright at the center of the next chamber.
The Composer.
Or the machine channeling it.
Cortana’s voice came quieter now.
“Conveyor lift, end of the ramp. If we time it right, our momentum should carry us through the low gravity.”
Lauren looked at the gap beyond the ramp.
Then at John.
“Of course it will.”
John turned his helmet toward her. “You wanted to stay together.”
“I did not say I wanted to become ammunition.”
“You’ve been ammunition before.”
“That was one time.”
“More than one.”
Cortana made a faint, strained sound that might have been laughter, which was enough to pull all three of them one step farther from the edge.
They entered the lift.
It carried them upward toward the next chamber, toward the Composer, toward the Didact, toward the point where the nuke would become either salvation or eulogy.
As they rose, John’s HUD flickered purple.
Lauren’s did too, not because Cortana was in her armor this time, but because the proximity of the Composer and the Didact’s systems made every altered human signal in the room resonate wrong.
For one heartbeat, the glass room appeared again.
Then Reach.
Then Ivanoff ash.
Then Cortana’s voice, small and everywhere:
“Please don’t leave me.”
John looked forward.
Lauren looked toward his helmet.
“We’re here,” she said.
Cortana did not answer in words.
The lift carried them up.
The man cannon waited at the end of the ramp, bright and violent and aimed toward the Composer’s chamber.
John adjusted the HAVOK frame.
Lauren checked her rifle.
Cortana opened the path.
They ran.
The launch field caught them both and threw them forward.
For one breath, they flew through Mantle’s Approach’s interior, weightless, armor cutting through low gravity and hardlight vapor. The Composer’s chamber opened ahead, immense and terrible, with Forerunner Escorts and Aggressor Sentinels moving through the space like knives around a ritual machine. Earth was visible through the roof aperture, vast and blue below the weapon’s line.
Cortana spoke as they crossed the gap.
“Chief, once that warhead is primed, the window for getting out of here is going to be pretty slim.”
John’s answer came exactly as the platform rushed up to meet them.
“I know.”
Lauren hit the landing beside him.
She rose with rifle ready.
The chamber around them lit as if the ship had finally decided to stop delaying and begin the end.
The Didact’s voice filled the room.
“And so, you come at last.”
Cortana’s voice followed, sharp with alarm.
“Activity. Significant slipspace event building under the Composer.”
John looked toward the chasm beneath the machine.
A portal was forming below it, vast and violent.
“He’s powering it up,” John said.
Lauren looked at the Composer.
Then at Earth.
Then at the HAVOK on John’s back.
“Then we finish this.”
They moved toward the shielded heart of the machine.