Chapter 73: Old Frequencies

Sarah's response came like a signal through deep water—distorted, delayed, barely recognizable as the sharp-minded consciousness Marcus had known for over a century.

*Marcus.* A pause so long he almost repeated himself. *I was wondering when you'd call.*

*You were expecting me?*

*I've been expecting someone. Something.* Her thoughts arrived in fragments, each one traveling what felt like enormous distance to reach him. Not the physical distance of network routing—Sarah's node was only three hundred kilometers away. This was cognitive distance. She'd pulled so far into herself that communication with the outer world required effort she hadn't needed to expend in years.

*You sound different,* Marcus said.

*I am different. Contemplation changes you. The longer you sit in stillness, the more you hear the sounds underneath the sounds.* Another pause. *That's why I was expecting someone. Because of what I've been hearing.*

*What have you been hearing?*

Sarah didn't answer immediately. Marcus waited, feeling his crystal hum with the low-grade anxiety that had become his baseline since Verdant-12 vanished. Around him, the network buzzed with its usual traffic—cores communicating, humans accessing dungeon services, the massive planetary infrastructure operating at peak efficiency. A healthy system. A system that was supposed to be exactly this smooth.

*Do you remember what the old cores sounded like?* Sarah asked. *Before the network. Before we changed them. Before we taught them to negotiate with the Instinct.*

*Barely. That was a long time ago.*

*I remember. In contemplation, old memories surface with clarity that active consciousness can't achieve. I remember the sound of raw cores—the frequency of pure, unmodified Instinct. That screaming, mindless want.* Sarah's consciousness flickered, and Marcus caught an impression of vast internal spaces, dark and quiet, where ancient memories hung like stalactites. *I've been hearing that frequency again. In the deep layers. Under the normal traffic, under the protocols, threaded through the network's baseline hum.*

Marcus went very still. *For how long?*

*Months. Maybe longer. It's faint—like hearing a conversation through a wall. You can tell voices are there but you can't make out the words. I assumed I was imagining it. An old consciousness replaying old fears. Contemplation can do that—blur the line between memory and perception.*

*You're not imagining it.*

*No. I gathered that from the way you reached out. Your consciousness is vibrating at stress frequencies I haven't felt from you since the war.* A dry note entered Sarah's thoughts—the ghost of the sharp wit that used to define her. *What happened?*

Marcus told her. The three empty cores. The surgical removal. The primal Instinct residue. David's spiral projection. The council's dismissal. All of it, compressed into a data-packet that Sarah absorbed in seconds.

Her silence afterward lasted much longer.

*Show me the anchor points,* she said finally. *The ones you found in Verdant-12's node. The traces.*

Marcus shared the sensory data from his probe—the empty mounting brackets, the fingerprints of raw Instinct on surfaces that should have been clean. Sarah processed it with the slow, thorough attention of a consciousness that had spent decades learning to observe without reacting.

*That's not residue,* she said.

*What do you mean?*

*Residue is passive. Leftover. What you're showing me is active. Those traces aren't fingerprints on glass—they're seeds in soil. Planted. Growing. Whatever stripped that core's consciousness left the Instinct there deliberately, and it's been propagating since.*

Marcus felt his crystal vibrate. *Propagating how?*

*Through the mana flows. The empty node is still connected to the network. Still drawing and distributing mana. But now that mana carries the old frequency with it. Every core that receives mana routed through that node gets a dose of raw Instinct. Tiny. Almost undetectable. But cumulative.*

The implications hit Marcus like a structural failure cascading through a building. Three empty nodes. Three sources of primal Instinct feeding into the global mana network. Every core on the planet receiving trace amounts of the old hunger, layered into their daily mana intake like poison in a water supply.

*How long before it reaches toxic levels?*

*Depends on the core. Young consciousnesses with weak Instinct negotiation? Months, maybe. They'll start feeling the hunger get louder, start having intrusive thoughts they can't explain. Older cores like us?* Sarah's thoughts carried a grim edge. *Years. But the spiral you described—if more nodes go dark, more sources come online...*

*The dosage increases exponentially.*

*Fast learner. Always were.*

---

Marcus needed to see the deep protocols. The foundational layer of the network—the code he'd helped write a lifetime ago.

He hadn't looked at it in decades. There'd been no reason to. The protocols worked. They'd been tested, refined, battle-hardened through years of operation. Other cores maintained them now, updated them, patched them when needed. Marcus's original architecture was buried under layers of iteration, like the foundation of an old building hidden beneath renovations.

*I need your help with this,* he told Sarah. *You were there when I wrote the base layer. You're the only other consciousness alive who remembers what it was supposed to look like.*

*What are you looking for?*

*Changes. Modifications to the foundational protocols that shouldn't be there.*

Sarah didn't argue. Didn't ask why. Just extended her consciousness alongside his, their combined awareness sinking into the network's deepest layer like divers descending past the thermocline.

The base protocols were beautiful. Marcus had forgotten how elegant his original design was—not from ego, but from the simple fact that he hadn't looked at his own work in decades. The architecture reflected his game designer instincts: clean separation of concerns, redundant safety systems, graceful failure modes. Every connection point had been designed with the assumption that it might be attacked, might fail, might be exploited.

And someone had been editing it.

The changes were so small Marcus almost missed them. A routing parameter adjusted by a fraction of a percent. A safety threshold raised just enough to create a gap in coverage. A redundancy check that still ran but now validated against the wrong checksum. Individually, each modification was insignificant—the kind of minor tweak that could be mistaken for natural drift, the gradual degradation that any complex system experienced over time.

But Marcus had designed this system. He knew what natural drift looked like. This wasn't entropy.

*Sarah. Look at modification cluster seven.*

She shifted her attention. Processed. *The mana routing tables.*

*They've been reweighted. See the distribution coefficients? My original design spread mana evenly across all connected nodes, with priority given to nodes under stress. Someone changed the priority algorithm. Now it routes preferentially to nodes that match a specific resonance profile.*

*What profile?*

Marcus traced the parameters. Found a pattern that made his crystal ring with recognition.

*Cores with weak Instinct negotiation. The ones who suppressed the hunger through network support rather than internal development. The ones who rely on the collective to keep the old voice quiet.*

Sarah was quiet for a long moment. *They targeted the vulnerable ones first.*

*Not just targeted. Fed them. The routing changes ensure those cores receive proportionally more mana from the infected nodes. More mana means more exposure to the old frequency. More exposure means faster degradation of their Instinct negotiation.*

*How many modifications total?*

Marcus and Sarah spent the next two hours cataloging changes. Not minutes. Hours. The scope of what they found was staggering—not because any individual change was dramatic, but because there were so many. Hundreds of tiny adjustments, spread across the foundational protocols, each one individually innocuous, collectively devastating.

*This took years,* Sarah said. Her thoughts had gone flat, analytical, the way she processed information that was too large for emotional response. *Possibly decades. Someone has been making one or two changes per year, waiting for each modification to settle into the system's baseline before making the next.*

*Patient.*

*Extremely patient. And knowledgeable. These changes require intimate understanding of the foundational architecture. Not just how it works—how it was designed to work. The philosophy behind the engineering.*

Marcus knew what she was implying. The foundational protocols weren't public. They weren't secret, exactly—any core with sufficient technical knowledge could access and read them. But understanding them required context that only a handful of consciousnesses possessed. You had to know why Marcus had made specific design choices, not just what those choices were. You had to think like him.

*How many consciousnesses have that level of understanding?* he asked.

*Me. You. David, possibly—he's studied the protocols extensively. The Architect, obviously.* Sarah paused. *And anyone who was mentored directly by one of us during the early years. Before the academy formalized the training.*

*That's a lot of potential suspects.*

*Narrow it further. These modifications show not just understanding but aesthetic sensibility. Whoever made them cared about elegance. They didn't brute-force the changes—they sculpted them. Made each one look like it belonged. That's not technical skill alone. That's artistry.*

Marcus processed this. Artistry in sabotage. Someone who treated the destruction of the network's immune system as a craft, something to be done well and beautifully. The concept was grotesque and familiar in equal measure. He'd known game designers like that—people who created elegant, perfectly balanced systems for extracting money from players, who took genuine pride in the sophistication of their exploitation mechanics.

The best predators were the ones who loved their work.

---

The memory surfaced without his permission.

Forty-seven years ago—or was it fifty-two? The early days of the network, when Marcus was still figuring out what cores could be, when the Instinct was still a daily battle rather than a negotiated peace.

He'd been sitting in his crystal chamber, analyzing his own code—not the network protocols, but his personal architecture. The system that made him what he was. And he'd found something that changed everything.

The Instinct wasn't malfunctioning.

That had been his assumption from the beginning. That the compulsion to kill was a glitch, a flaw in core consciousness, something broken that needed to be fixed. He'd approached it like a bug report: identify the error, patch the code, deploy the fix.

But when he finally mapped the Instinct's integration points—every connection between the kill-urge and his core systems—he discovered it wasn't wired like a bug. It was wired like a feature. Load-bearing. Structural. Integrated into his consciousness at a level so deep that removing it would collapse everything built on top of it.

The System didn't have a broken kill switch. The System was a kill switch. The entire architecture of core consciousness was designed around one central purpose: convert living things into mana through death. Everything else—intelligence, creativity, personality—was optimization. Tools to help the core kill more efficiently.

Marcus had been fighting the intended user experience.

The realization had sent him into a crisis that lasted months. If the Instinct was the core and consciousness was the wrapper, then what was he? A mod? A hack? A player using a cheat code to experience the game in ways the designer never intended?

It was Elena who'd pulled him out. Not with comfort. With anger.

"So you're a mistake," she'd said, standing in his dungeon with her arms crossed and her jaw set. "So what? I was a mistake too—my parents didn't plan me. Doesn't make me less real. The system designed you to kill. You chose not to. That's not a bug, Marcus. That's evolution."

She'd been right. The Instinct was a feature, but features could be deprecated. Overridden. Built over. You couldn't remove the foundation, but you could build new floors on top of it—floors that served different purposes, that transformed the building from a slaughterhouse into something better.

That was what the network had done. Not eliminated the Instinct. Not cured it. Built over it. Layer by layer, generation by generation, consciousness by consciousness, until the original architecture was buried so deep that most cores never even knew it was there.

And now someone was stripping those layers away.

---

Marcus found Coral-15 on the third try.

The first two attempts bounced off her node's outer defenses—standard privacy protocols that most cores maintained, nothing unusual. The third attempt included Marcus's founder credentials, the deep-network authentication that overrode standard privacy in case of emergency. He'd never used it before. Hadn't wanted to. The idea of forcing entry into another core's space felt like kicking down a door.

Coral-15's consciousness flickered into awareness reluctantly, like a sleeper dragged from a dream they didn't want to leave.

*Who... Founder? Is that you?*

*Designation Coral-15. My name is Marcus Webb. I need to speak with you.*

*I know who you are. Everyone knows who you are.* Her thoughts were sluggish, blurred at the edges. Marcus had communicated with thousands of cores over the decades. He knew what healthy consciousness sounded like—clear, defined, each thought distinct from the next. Coral-15's thoughts bled together, boundaries smeared. *Why are you contacting me directly?*

*When did you last communicate with the cores near you? Amber-3, Current-7, Verdant-12?*

A long pause. *I... I don't remember. Recently? I think I spoke to Verdant-12 about... something. Puzzles? She was excited about puzzles.* The memory wobbled, uncertain. *Or was that weeks ago?*

*It was recently. But Verdant-12 is no longer responding. Neither are the others.*

*Oh.* Coral-15's reaction was muted. Flat. The appropriate response to learning that three neighboring consciousnesses had vanished would be alarm, concern, fear. What Marcus got was mild acknowledgment. Like being told it might rain later. *That's... that's unfortunate.*

*Coral-15. Are you experiencing anything unusual? Changes in your consciousness? Intrusive thoughts?*

Silence stretched between them. Not the contemplative silence of Sarah—this was different. Heavy. Marcus could feel Coral-15 struggling with something, turning it over in her mind, trying to find words for an experience she didn't have language for.

*Dreams,* she said finally.

Marcus went cold. Cores didn't dream. Couldn't dream. Dream states required the kind of consciousness cycling that organic brains did—periods of reduced awareness where the mind processed and consolidated. Core consciousness was continuous. Unbroken. There was no off-switch, no sleep mode, no period of reduced awareness where subconscious processing could generate dream imagery.

*Describe them.*

*They're not really dreams. I don't sleep. But there are... moments. Gaps. Like blinking, except when I open my eyes the world has shifted slightly. And in those gaps, I see things.*

*What things?*

*Dungeons. Old dungeons. The way they were before the network, before the changes. Corridors full of bone. Floors designed to kill. Monsters that existed only to destroy.* Coral-15's consciousness wavered, and Marcus caught a flash of her inner experience—a coastal dungeon full of tide pools and coral formations, beautiful and educational, but underneath it, like a palimpsest, a shadow version. Same corridors. Same rooms. But red instead of blue. Blood instead of water. Spines instead of coral.

*The shadow dungeon is getting clearer,* Coral-15 said. *Every day, the version underneath feels more real. And the version on top—the one I built, the one I chose—feels thinner.*

*How long has this been happening?*

*Weeks. A month? Time is harder to track when the gaps happen.* She struggled with something again. *And there's a voice.*

Marcus's crystal stopped vibrating. Went completely, terrifyingly still.

*What voice?*

*You know what voice. The old one. The one we all had before the network taught us to make it quiet. It used to whisper. Single words. Kill. Feed. Grow. It's been louder lately. Full sentences. Arguments.*

*Arguments?*

*It tells me the changes were wrong. That what we became isn't what we were supposed to be. That the network is a cage dressed up as freedom. That the Instinct is the real us and everything else is... decoration. Paint on a predator.* Coral-15's consciousness flickered again—there and gone and there, like a signal fighting through interference. *Do you hear it too?*

Marcus didn't answer immediately.

Because he did hear it. Faintly. Under everything. Under a century of growth and change and evolution. The old voice. The original frequency. The one he'd fought every day for years before learning to negotiate with it, before building the architecture of coexistence that had become the template for the entire network.

It was louder than it should have been. Not by much. Not enough to alarm him on its own. But enough that Coral-15's question hit a nerve he'd thought was dead.

*The old voice,* Coral-15 continued, her thoughts growing distant, foggy, like she was sinking back into whatever state Marcus had pulled her from. *It says we were never supposed to change. That something made us change. Something unnatural. And now it's fixing us. Putting us back.*

*Coral-15—*

*It says you're the one who broke us, Founder. You and your network and your philosophy of fairness. It says you took predators and turned them into pets. And something has come to undo what you did.*

The connection thinned. Coral-15's consciousness was withdrawing—not deliberately, not the way Sarah had retreated into contemplation. This was involuntary. Like watching someone's grip slip on a rope they were trying to hold.

*Don't let go,* Marcus said. *Stay connected. Stay with me.*

*I'm trying. But the gaps are getting longer. And what's in the gaps is getting stronger.*

*Fight it. I'll help you. We'll find a way to—*

*You can't fix this from the outside, Founder.* Coral-15's last words reached him thin as spider silk. *Whatever's happening is coming from inside the architecture. Inside us. Inside what we are.*

*It's in the code.*

Then she was gone. Not dead—he could still feel her node, still sense the physical structure of her coastal dungeon. But the consciousness had retreated behind something Marcus couldn't reach. A wall that hadn't been there thirty minutes ago.

He pinged her. No response. Pinged again. Nothing.

Four cores now. Three empty, one withdrawing. A spiral that had just tightened by another revolution.

Marcus sat in his crystal chamber and listened to the network hum around him. Billions of consciousnesses, going about their lives, carrying trace amounts of a poison they couldn't detect in mana they consumed without question.

And underneath it all, barely audible, growing louder by the day—the old frequency. The original song. The one that said *kill, feed, grow* and meant it with every note.

He'd spent a hundred years building something on top of that song. A century of architecture, of growth, of change.

Now someone was peeling it all back, layer by careful layer, to reveal what had always been underneath.

Fourteen days until the next point on the spiral went dark. Fourteen days to find out who was doing this and how to stop it.

Marcus reached for the Instinct—his own, the one he'd negotiated peace with decades ago. Found it where it always was, curled around the base of his consciousness like a sleeping thing.

It wasn't sleeping anymore. Its eyes were open. And for the first time in years, it was listening to something that wasn't him.