Chapter 81: Four Days

Marcus built through the night.

Not the controlled, guided sessions with Maya's dual-frequency monitoring and Viktor's instruments tracking every fractional advance. This was something older. Rougher. The kind of work that happened when the numbers said you were losing and the only response left was to pour yourself into the gap between where you were and where you needed to be, and hope the pouring didn't empty you before the gap closed.

The receptive state held. The green threads raced through the fracture walls—northeastern section seven, where the secondary countermeasure tendril had redirected its approach toward the thinnest point in Marcus's organic defenses. Forty-one percent resistance threshold. The tendril needed the density at one hundred percent to be stopped. Four days to close a fifty-nine percent gap in architecture that had been growing at rates that would need—

He didn't do the math. Viktor had done the math. The math said they lost.

The organic growth wove its dense, interleaving patterns into the wall. Layer upon layer. The green threads building inward, following the structural blueprints that Thessaly's technique data prescribed—the resistance-level architecture that required specific angles, specific configurations, specific interlocking patterns that made the difference between a wall that could absorb a countermeasure assault and a wall that shattered on contact.

Marcus's hands burned. Both of them. The bilateral heat that had replaced the old asymmetry was worse tonight—not the dull warmth of controlled guided work but a sharp, bright heat that radiated from his palms through his wrists and into his forearms. The authority's architecture protesting the intensity. The consumption nodes in his chest humming their hungry frequency, feeding on the stress of sustained high-output growth, advancing their slow digestion of the distance between themselves and his core.

Five point six one centimeters. Terminal range.

Marcus built anyway.

The northeastern wall thickened. Forty-three percent. Forty-five. The organic material accumulating in the fracture architecture with each pass of the guided technique, each layer adding density that the countermeasure tendrils would have to penetrate when they arrived. Not enough. Not fast enough. The secondary tendril was advancing at point seven millimeters per day on an optimized vector that targeted every weakness the second system's scan had revealed, and the wall Marcus was building would reach perhaps sixty percent by the time it arrived.

Sixty percent wasn't resistance level. Sixty percent was a speed bump.

But sixty percent was better than forty-one, and forty-one was where it would stay if Marcus stopped building, so he built.

---

Maya found him at 0300.

She came into the lab without announcement—the door opening, the dual-frequency Resonance entering the space with its precise, laser-focused signature. The primary tone and the secondary harmonic. The two architectures she carried in her rebuilt ability, blending in the dimensional space like two languages spoken simultaneously by a translator who'd stopped distinguishing between them.

Marcus didn't open his eyes. The receptive state held. The green threads continued their work in the northeastern wall.

"You are losing point zero one centimeters per hour at this intensity," Maya said. Her voice was professional. Flat. The clinical register that had replaced her casual speech patterns. But she was here at 0300, which was not a scheduled session time, which meant something had brought her to the lab that wasn't on the operational calendar.

"I know."

"In four hours you will have advanced the consumption distance by point zero four centimeters. Total distance: five point five seven. The wall density will have reached approximately fifty-two percent. You will have gained eleven percent density at the cost of point zero four centimeters of margin that you cannot recover."

"I know, Maya."

"Then you also know that the math does not work." She crossed the lab. Not to her equidistant center position. To the platform's edge. Close enough that her Resonance pressed against his guided technique—the dual frequency interfacing with the organic growth, reading it, mapping it with the resolution that only her rebuilt ability could achieve. "Even at maximum sustained output for the full four days, the northeastern wall reaches sixty-three percent density. The consumption advance over four days of maximum output: point one six centimeters. Distance to core at the end of four days: five point four five centimeters. Well inside terminal range. And the wall still isn't at resistance level."

Marcus opened his eyes. Looked at her. The tight braid. The clear eyes. The posture of a woman who had run the calculations sometime between the end of the last session and 0300 and had come to the lab not because she wanted to but because the numbers demanded it.

"You have an alternative," he said.

"I have a question." Maya's Resonance shifted. The secondary harmonic—the second system's distributed frequency—rose beneath her primary tone. "The chrysalis data. Thessaly's transformation. The second system observed her shell for eight hundred years. The data describes how the shell works—not just what it is, but how it processes energy. How it converts hostile input into structural fuel."

Marcus sat up on the platform. The receptive state held—the green threads continuing their autonomous building pattern in the northeastern wall, the guided technique maintaining its work without his active direction. A background process. The organic architecture had learned enough from weeks of practice to sustain basic growth patterns without constant guidance.

"Thessaly captured the cascade energy," Maya continued. "The Messenger's weapon. Designed to destroy organic architecture. She didn't block it. She didn't resist it. She redirected it. Folded it into the shell's structure. Converted the attacking energy into fuel for transformation." The dual frequency pulsed. "The countermeasure tendrils are energy. Concentrated consumption architecture, designed to penetrate and destroy organic growth. The same fundamental principle as the cascade—hostile energy directed at organic material."

"You're suggesting we build the walls the way Thessaly built the chrysalis."

"I am suggesting that the second system's data contains structural blueprints for organic architecture that converts hostile energy instead of resisting it. The resistance-level approach—building walls thick enough to absorb the countermeasure assault—requires density we cannot achieve in four days. The conversion approach requires structural complexity instead of density. Different architecture. Different technique. And we have the blueprints."

Maya pulled up a projection on Viktor's instruments. The chrysalis data—the second system's eight-hundred-year observation of Thessaly's shell, displayed in the analytical format that Viktor's equipment had stored during the decoding. The structural patterns of the shell's architecture. The interlocking layers. The energy-conversion pathways that turned cascade force into transformation fuel.

"These patterns are in the data dump," Maya said. "The second system didn't just describe the chrysalis. It provided the architectural schematics. The structural grammar of how organic material can be configured to convert rather than resist." She traced a pathway on the projection. "If we reconfigure the fracture wall architecture to follow these patterns—if we rebuild the organic material in the contact zones using chrysalis-derived technique instead of standard resistance-level construction—the walls won't need to be thick enough to stop the tendrils. They need to be complex enough to convert the tendrils' energy when they arrive."

The projection showed two models side by side. The resistance-level wall—thick, dense, layered for absorption. And the chrysalis-derived wall—thinner but intricately structured, the organic material configured in folding, interlocking patterns that created energy conversion channels throughout the architecture.

"Think of the difference between a dam and a waterwheel," Maya said. "The dam blocks the river. It needs to be stronger than the current. The waterwheel uses the current. It needs to be positioned correctly and structured to capture the flow. The dam approach requires mass we don't have time to build. The waterwheel approach requires precision we might achieve in four days."

Marcus studied the projection. The chrysalis patterns. The energy conversion pathways. The structural complexity that replaced raw density with architectural sophistication.

"How certain are you that this works?"

"I am not certain." The first honest qualifier. The professional register holding, but beneath it the texture of someone proposing a theory derived from alien data about a dead woman's survival technique, applied to a problem that had no precedent and no test case. "The chrysalis was built by Thessaly—a consciousness with four centuries of organic technique mastery. We are applying her principles to architecture built by a man who has been practicing guided growth for two weeks. The structural precision required for energy conversion is—" She stopped. Reconsidered her words. "The margin for error in conversion architecture is smaller than in resistance architecture. If the patterns are wrong—if the interlocking is imprecise—the conversion fails and the tendrils penetrate a wall that is both thinner and weaker than resistance-level construction."

"Worse than what we have now."

"Significantly worse. A failed conversion wall is worse than an incomplete resistance wall. The resistance wall at sixty percent still slows the tendrils. A failed conversion wall accelerates them—channels the energy inward instead of converting it, turning the wall into a funnel."

The choice sat between them. The safe bet that guaranteed insufficient protection versus the risky bet that might provide complete protection or might make everything worse. The mathematics of desperation—when the conservative approach loses, the only remaining options are the ones that carry higher variance.

"The data is from the second system," Marcus said. "The same system that just scanned our entire architecture through the communication channel. The same system whose intelligence is now informing the countermeasure repositioning."

"Yes."

"How do we know the chrysalis data is accurate? How do we know it isn't deliberately misleading—structural blueprints designed to fail, to make us build walls that channel the countermeasure assault directly into the organic growth?"

Maya was quiet for four seconds. Her Resonance hummed its dual tone. The secondary harmonic—the second system's frequency—pulsed beneath her primary signal.

"We don't," she said. "The data arrived through the same channel that carried the scan. The information and the intelligence extraction were simultaneous. We cannot verify the chrysalis data independently. We cannot test conversion architecture on a small scale before committing—the countermeasure tendrils arrive in four days, and rebuilding the wall architecture takes the full four days to complete. There is no trial run."

"So we trust the data or we don't."

"We trust the data. Or we build sixty-percent resistance walls and watch the tendrils penetrate them in four days."

Marcus flexed his hands. Both burning. The gesture that measured everything and solved nothing.

---

Viktor arrived at 0500.

He came to the lab carrying his tablet and wearing the expression of a man who had not slept and whose cuticles had paid for the insomnia—the bandages on both hands fresh, which meant he'd replaced them in the night, which meant the old ones had soaked through, which meant his analytical mind had spent the dark hours processing data at a rate that his body expressed through compulsive self-destruction.

"I have been analyzing the chrysalis data since the decoding session ended," Viktor said. He set his tablet on the instrument panel. Pulled up projections. The chrysalis architectural schematics—the same data Maya had shown Marcus, but filtered through Viktor's analytical framework, annotated, stress-tested, run through structural models that predicted load capacity and failure modes and conversion efficiency. "Maya's proposal has merit."

"I heard the proposal," Marcus said.

"You heard the concept. The concept is sound—conversion architecture that uses hostile energy rather than resisting it. The implementation is where the risk concentrates." Viktor pulled up a stress model. The chrysalis-derived wall pattern, subjected to simulated countermeasure assault. The organic architecture bending, flexing, converting—the energy channels redirecting the tendril's force through the interlocking patterns, transforming penetrative energy into structural reinforcement.

The simulation ran for twelve seconds. Then the conversion pattern destabilized. The interlocking layers slipped—a cascade failure that started at a single misaligned junction and propagated through the entire wall in point four seconds. The wall collapsed inward. The tendril penetrated.

"This is the failure mode," Viktor said. "Structural cascade. The conversion patterns require precise alignment at every junction point. If any single junction is misaligned by more than two degrees, the energy conversion fails at that point. The unconverted energy propagates through the wall, hits adjacent junctions at unexpected angles, destabilizes them. The cascade spreads. The wall fails not gradually but catastrophically—complete structural collapse in under one second."

"Two degrees," Marcus said.

"Two degrees of angular tolerance at each junction. There are approximately four hundred junction points per linear meter of wall architecture. The northeastern contact zone—section seven, where the secondary tendril will arrive—is nine meters across. Three thousand six hundred junctions. Each one must be aligned within two degrees of the chrysalis blueprint. One misalignment starts the cascade."

The number sat in the room. Three thousand six hundred precision points, each one a potential failure that would collapse the entire wall.

"Can Marcus build that precisely?" Maya asked. She'd moved to her center position. The dual-frequency Resonance mapping the fracture architecture, reading the current organic growth, assessing the structural precision of the existing construction.

"Marcus's guided technique currently achieves structural precision of approximately five degrees at junction points," Viktor said. "This is excellent for resistance-level construction, where the tolerance is fifteen degrees. It is insufficient for conversion architecture by a factor of two and a half."

"So the answer is no."

"The answer is not yet." Viktor pulled up a different analysis. The organic growth rate data—the efficiency improvements that Marcus had achieved over two weeks of practice. The learning curve. The precision gains. "Marcus's technique has been improving steadily. The angular precision at junction points has tightened from approximately twenty degrees in the first week to five degrees currently. The improvement rate suggests that with focused practice and Maya's dual-frequency monitoring providing real-time feedback, Marcus could achieve two-degree precision within—"

"Within how long, Viktor."

"Three to five days."

The number collided with the other number. Four days until the tendril arrived. Three to five days to achieve the precision required. Another gap. Another race where the timeline said maybe, and maybe was the best they could get.

"There is another option," Kael said.

He was in the doorway. Standing the way Kael stood when he'd been listening for longer than anyone realized—body still, hands pressed against the door frame, his between-dimension sensing extended into the lab, reading the dimensional architecture of the conversation the way he read the dimensional architecture of everything.

"Kael," Marcus said.

"The conversion architecture doesn't have to be perfect everywhere." Kael walked into the lab. His hands left the door frame and started twitching—the rapid, unconscious motion that meant his sensing was processing something complex. "It has to be perfect at the contact point. Where the tendril hits. The rest of the wall can be standard resistance construction—thick, dense, imprecise. Only the section where the tendril actually makes contact needs conversion architecture."

Viktor turned to him. The direct gaze. "Continue."

"The tendril's approach vector is known. Maya's dual-frequency monitoring can track it in real time. We know where it's going to hit—section seven, northeastern wall, targeting the weakest point. What if we build standard resistance architecture across the entire wall, but at the specific contact point—the point where the tendril will actually touch the organic material—we build conversion architecture. A small section. Focused. One or two meters instead of nine. The number of junction points drops from three thousand six hundred to—"

"Four hundred," Viktor said. "Approximately." His cuticle-picking stopped. His eyes moved to the projection—the stress model, recalculating. The conversion pattern, applied to a two-meter section instead of the full wall. The junction count dropping. The precision requirement unchanged, but the scope dramatically reduced.

"Four hundred junctions," Kael said. "At two-degree tolerance. With Maya providing real-time angular feedback. In a focused section that Marcus can reach with concentrated guided technique instead of spreading across nine meters."

Viktor ran the simulation. The modified design—standard resistance wall across the full contact zone, with a conversion-architecture insert at the predicted impact point. The tendril approached. Hit the conversion section. The energy channels activated. The hostile force redirected, converted, absorbed into the organic structure. The wall held.

He ran it again. With a three-degree misalignment at twelve percent of junctions. The conversion strained. Flexed. Two junctions failed—but the failures were contained by the surrounding resistance architecture, which absorbed the unconverted energy at reduced efficiency instead of cascading. The wall held. Damaged. But intact.

"The hybrid design is fault-tolerant," Viktor said. His voice had shifted—the analytical register warming with something that approached enthusiasm, the sound of a structural engineer who'd found an elegant solution hiding inside a brute-force problem. "The resistance architecture acts as a containment frame for the conversion section. If individual junctions fail, the surrounding material absorbs the spillover. The cascade failure mode is eliminated—or rather, contained to a scope that the resistance architecture can survive."

"How many junctions can fail before the wall is breached?" Marcus asked.

"At three-degree precision, approximately eight percent of junctions will be misaligned beyond conversion tolerance. The resistance frame can absorb the spillover from up to fifteen percent junction failure. At five-degree precision—Marcus's current level—approximately thirty percent of junctions fail. The resistance frame cannot absorb thirty percent spillover. The wall breaches."

"So I still need to improve from five to three degrees."

"Yes. But three degrees, not two. And four hundred junctions, not three thousand six hundred. And with Maya's monitoring providing angular feedback at each junction in real time." Viktor looked at Maya. "Can your dual-frequency Resonance provide junction-level feedback during guided construction?"

Maya's Resonance pulsed. The dual tone filling the lab—the primary frequency reading the organic architecture, the secondary harmonic processing the conversion patterns through the second system's structural language. Her ability interfacing with both architectures simultaneously, the bridge between two engineering traditions applied to a construction problem.

"Yes," she said. "I can read each junction as Marcus builds it. Provide angular correction before the organic material sets. Guide the alignment in real time."

"The two of you would need to be in continuous communication during construction. Every junction. Every correction. Zero delay between Maya's reading and Marcus's adjustment."

"We can do that," Maya said. Her professional register held. But she looked at Marcus when she said it—a glance, brief, direct. The first time in days that her gaze carried something beyond clinical assessment. Not warmth. Not the old casual trust. Something more precise. The specific acknowledgment of two people who would need to work in absolute synchrony to build something that neither could build alone.

Marcus met her gaze. Nodded.

"The secondary tendril hits the northeastern wall in four days," Marcus said. "Build timeline for the hybrid design?"

Viktor calculated. His fingers moving over the tablet—the numbers, the rates, the structural requirements feeding into the timeline that would determine whether the design was achievable or theoretical.

"Standard resistance construction across the full wall: three days at accelerated pace. Maya and Kael monitoring, Dara reinforcing with patches. The conversion insert at the contact point: one day of precision construction with Maya's junction-level feedback. Total: four days. The timeline matches the tendril arrival date exactly."

"No margin."

"No margin. The construction must complete as the tendril arrives. If the resistance wall takes longer than three days, the conversion insert does not have time to be built. If the conversion insert takes longer than one day, the tendril arrives before completion. Every hour of delay is an hour of unfinished architecture at the contact point."

Marcus stood from the platform. The receptive state held—the green threads maintaining their autonomous building in the northeastern wall, the background growth continuing while his active attention moved to the planning.

"Dara," he said. "Where is she?"

"Operations center," Kael said. "Her patch network has been running continuous reinforcement on the breach perimeter since yesterday. She hasn't slept either."

"Get her here. And Lucia."

Kael left. Marcus turned to the projection—the hybrid wall design, the conversion insert, the four-day timeline with its zero-margin schedule. The plan that required every member of the team to operate at peak performance for ninety-six consecutive hours with no room for error, no room for crisis, no room for the unexpected complications that had defined every week of his authority's development.

"Viktor," Marcus said. "The consumption advance. Four days of accelerated construction. What does it cost?"

Viktor had the number ready. He'd calculated it before coming to the lab. The same way Viktor always had the worst number ready—prepared, confirmed, sitting in his analytical framework like a loaded weapon, waiting to be asked for.

"Point one two centimeters," Viktor said. "At the accelerated pace required for the three-day resistance wall plus one-day conversion insert. Your consumption distance drops from five point six one to approximately five point four nine."

Five point four nine. Terminal range. Viktor's models showed recovery probability declining from slim to theoretical.

"There is a complication," Viktor added. His formal register thinned. The words arriving with the reluctance of a man who'd found another piece of bad news hiding behind the first. "The consumption data from the second system's scan. The intelligence that the collective transmitted to the Messenger's automated defenses through the forty markers. The scan included your consumption architecture's current configuration—the distance to core, the node positions, the advance rates. The countermeasures are not the only system that received updated intelligence."

Marcus understood before Viktor finished the sentence.

"The consumption nodes themselves."

"The consumption architecture is automated. It responds to data inputs. When the second system's scan data propagated through the boundary architecture—through the markers, through the mechanical framework—it reached the consumption nodes directly. The nodes now have a current, comprehensive model of their own progress. Including the distance to core." Viktor set down his tablet. His cuticles bled through the fresh bandages. "The consumption architecture has been advancing at a rate calibrated to Marcus's activity level—higher activity produces higher advance. But the advance rate has also been constrained by the nodes' incomplete picture of the overall architecture. They didn't know exactly how close they were to core. They were advancing blind—pushing forward at a steady rate without a map."

"And now they have a map."

"Now they have a precise, current measurement of the distance to core. Five point six one centimeters. The nodes know exactly how far they are from Marcus's essential architecture. The advance rate may accelerate—not because Marcus's activity increases, but because the consumption architecture recognizes how close it is to completion and optimizes its approach accordingly."

The room absorbed this.

"How much acceleration?" Marcus asked.

"Unknown. The consumption architecture's response to positional data is not well understood. It may not change at all—the automated advance may be rate-limited regardless of positional awareness. Or it may increase significantly." Viktor's voice dropped. "If the advance rate increases by twenty percent, the four-day construction period costs point one four centimeters instead of point one two. Distance to core: five point four seven. If by fifty percent, point one eight centimeters. Distance: five point four three."

Five point four three. Numbers that made five point six one look comfortable by comparison. Numbers that put Marcus's survival margin at the width of a few human hairs, measured against an architecture that was now hunting him with surgical precision and perfect maps.

"We build," Marcus said.

The words came out quiet. Not the short, clipped command voice. The voice of a man who'd heard the numbers and processed the numbers and understood the numbers and decided that the numbers, terrible as they were, described the only available path. Build the hybrid wall. Achieve three-degree junction precision. Complete the conversion insert in time. Survive the consumption advance. Or don't build, and the tendril penetrates in four days, and the organic architecture in the fracture walls is attacked from a position it cannot survive, and everything they'd accomplished since the breach became wreckage.

There was no third option. Viktor had been right about that, back when the timelines first converged. Fight or talk. Build or break. The choices narrowed to two, and one of them was already happening whether they chose it or not.

---

Dara arrived at 0600 with Lucia behind her.

The door-walker moved through the lab with her dual presence—the physical body and the dimensional partner, both gazes tracking the projections that Viktor had arranged around the room. The hybrid wall design. The conversion insert schematics. The four-day timeline. The consumption distance projection that ended at a number no one wanted to say out loud.

Lucia stood beside the projection of the conversion architecture. Her dual voice was quiet—both registers muted, the door-partner's whisper and her own speech blending into something contemplative.

"This is a threshold," Lucia said. "A door that opens once. If the conversion works—if the organic architecture learns to turn hostile energy into structure—it does not simply survive the tendril. It becomes something that grows from attack. The more the countermeasures assault it, the stronger it becomes."

"If it works," Dara said. She stood apart from the group. Arms crossed. The practical stance of someone who'd been maintaining a patch network for ten days straight and whose tolerance for theoretical elegance had been eroded by operational reality. "Four hundred precision junctions in one day. Marcus has never built conversion architecture before. The technique is derived from alien data about a dead woman's survival mechanism, applied through structural blueprints provided by the same intelligence that just leaked our entire defense posture. If any of those junctions fail beyond the tolerance, the wall goes down worse than if we'd built standard."

"Thessaly is not dead," Maya said. The correction was automatic. The dual-frequency Resonance carrying the weight of nine hours of decoded data—eight centuries of observation confirming that the consciousness in the boundary's deep layers was not a static remnant but an active, evolving entity. "The technique is derived from a living architecture's survival mechanism. The distinction matters."

"The distinction matters to Thessaly," Dara said. "To the wall, it matters whether the junctions are aligned within three degrees."

Marcus cut the discussion before it became an argument. "Assignments. Three-day wall build starts at 0700. Dara—your patches provide structural reinforcement along the base of the resistance wall. The standard architecture needs a foundation solid enough to act as the containment frame for the conversion section."

"My patches can do that."

"Maya—continuous monitoring during all construction sessions. Macro-level for the resistance wall, junction-level for the conversion insert. I need your Resonance reading every meter of construction in real time."

"Understood."

"Viktor—analytical oversight. Run continuous stress models as we build. If the resistance wall's structural profile deviates from the design parameters, I need to know before the deviation propagates."

"Naturally."

"Kael—tendril tracking. Continuous monitoring of the secondary countermeasure approach. If the vector changes—if the tendril redirects to a different section of the wall—I need to know the moment it happens, so we can reposition the conversion insert."

"I'll catch it." Kael's hands twitched at his sides. The rapid, nervous motion. But his voice held steady.

"Lucia—passage contingencies. If the wall fails, if the tendril breaches, your passages are the evacuation route for the team. Map the exit paths from the lab to safe positions beyond the fracture zone."

Lucia's dual gaze settled on him. Both registers. "We will hold the thresholds," she said. "But Marcus. The conversion architecture is not just a wall. It is a principle. A way of being that turns assault into structure. If it works here—if your organic architecture learns to convert rather than resist—it changes what you are. Not just what you build."

Marcus looked at her. The door-walker's cryptic language—the metaphors that sounded like philosophy and landed like prophecy. Usually he parsed them later, after the crisis, when there was time to unpack the layers.

"One thing at a time," he said. "First we survive the wall. Then we become whatever's on the other side of it."

Lucia almost smiled. Both mouths.

The team moved. Viktor to his instruments. Maya to her center position. Kael to his monitoring station. Dara out the door. Lucia to the passages.

Marcus sat on the platform. Closed his eyes. Opened the receptive state.

The authority's architecture flooded his awareness. The fracture lines. The organic growth. The northeastern wall—section seven—where the secondary countermeasure tendril advanced at point seven millimeters per day, routing around the densest sections, targeting the thinnest point with the surgical confidence of an automated defense system armed with perfect intelligence.

The green threads reached into the wall. Building. Not the chrysalis patterns—not yet. Standard resistance architecture for the first three days. Thick. Dense. The foundation that would contain the conversion insert when the time came.

Maya's Resonance pressed against the growth. The dual frequency humming at maximum resolution—reading each thread, each layer, each structural pattern as it formed. Her voice arrived in the steady, clinical cadence that had become the rhythm of their work.

"Northern edge density at forty-three percent. Growth angle acceptable. Continue current vector for six meters, then rotate to the eastern face. The foundation layer needs to wrap the full contact zone before you start building height."

Marcus built. The organic growth surged into the fracture wall at accelerated pace. The green threads wove their patterns—resistance-level, dense, thick, forgiving of the five-degree imprecision that was the best he could currently achieve. The crude architecture that would frame the precision architecture that would save him or kill him.

Four days.

The secondary tendril advanced point seven millimeters toward the northeastern wall, and Marcus built the wall that would meet it, and the consumption nodes hummed their recalibrated frequency—armed with a map now, approaching with purpose.

"Growth rate holding at nine point two times baseline," Maya reported. "Consumption advance tracking at point zero five centimeters per hour at current intensity. The foundation layer in the northern edge is reaching acceptable density. Rotate to the eastern face."

Marcus rotated. The green threads shifted. The wall grew.

Four days. Four hundred junctions. Five point six one centimeters.

Marcus built.