Four pulses in eighteen hours.
Dohyun spread Taeyang's overnight sensor log across the back table at 05:00, the printout still warm from the portable printer they'd set up next to the monitoring station. The log showed timestamps, locations, amplitudes. Each pulse represented by a spike on the waveform trace. Each spike identical to the last.
11:37 — Eastern arc, Sensor 4.
23:17 — Southern arc, Sensor 7.
01:42 — Southern arc, Sensor 9. Different sensor. Six kilometers from the first southern reading.
03:55 — Western arc, Sensor 2. Bucheon sector.
The pulses were moving. Not along a single path but across multiple arcs, jumping between sections of the infrastructure that were geographically separated by tens of kilometers. And the interval was shrinking. Twelve hours between the first and second. Two and a half hours between the second and third. Two hours thirteen minutes between the third and fourth.
Dohyun pulled the nine-name target list from the folder he kept under the operational board. Taeyang had compiled it in chapter 99 — nine individuals whose proximity to the infrastructure, mana sensitivity, and professional access to dungeons made them potential gardener agents. Three were protected: Cho Mirae, Song Hayeon, and Ryu Jiwon, with gate restrictions arranged through Kwon. One was under security review: Im Soojin, the former Association researcher.
Five were unprotected. Five names on a piece of paper that he looked at every morning and couldn't do anything about.
Yun Jaewoo. B-rank, environmental monitoring. Worked the eastern arc.
Park Dongmin. C-rank, survey specialist. Based near Suwon.
Bae Eunseo. C-rank, healer class. Clinic near Anyang.
Hwang Minsoo. B-rank, structural analyst. Contracted to the Association's construction division.
Kang Taehyuk. C-rank, solo clearer. Operated in the Bucheon area.
Five people going about their lives within the infrastructure's reach. Five people who slept in apartments and houses that sat above mana channels carrying signals they couldn't feel and wouldn't recognize if they could. Five people the gardener could modify in a single night, the way it had modified Yeonhwa, the way it had modified Seokhwan — installing cutting technique and belief structure and purpose while the target dreamed.
The fourth pulse had been in Bucheon sector. Kang Taehyuk operated in the Bucheon area.
Dohyun looked at the list. At the pulse locations plotted on the map. At the overlay between the two.
He called Taeyang.
"The pulse at 03:55. Western arc, Sensor 2. How close is that to Kang Taehyuk's registered home address?"
Keyboard sounds. "Checking the Association registry." Pause. "Taehyuk's registered address is in Bucheon-si, Ojeong-dong. The Sensor 2 reading was from the western arc section that runs through Ojeong-dong's geological substrate."
Under his house. The pulse had gone through the infrastructure directly beneath where Kang Taehyuk slept.
"And the first southern pulse at 23:17. Sensor 7. What's near that location?"
"Sensor 7 covers the Anyang sector. Bae Eunseo's clinic is four hundred meters from the sensor's coverage area."
Two pulses. Two targets. The geographic correlation wasn't proof — the infrastructure ran under half of greater Seoul, and millions of people lived above it. But the timing, the acceleration, the pattern of pulses reaching toward specific sectors where specific people with specific mana profiles slept—
"It's the recruitment signal," Dohyun said.
"What?"
"The pulses. They're not the gardener watching us. They're the gardener reaching for new agents. The anomalous signature is the modification delivery system. It's sending the cutting technique through the infrastructure channels to potential targets."
Silence on the line. Taeyang processing. "The architects said the gardener's only limitation was speed. How fast it could extend its attention."
"It found a way to go faster. Instead of extending its attention slowly along the channels, it's sending targeted pulses. Direct delivery to specific locations. Specific people."
"Then the five unprotected targets—"
"Are being recruited right now. Maybe already modified. Maybe tonight. Maybe last night."
The list on the table. Five names. Four pulses. The gardener wasn't responding to Yeonhwa's keystone surveys. It had been working this whole time, building its next generation of agents while Dohyun's team was busy holding Bucheon and checking keystones.
"I need to reach them," Dohyun said. "Today. Starting with the ones nearest the pulse locations."
"You're scheduled for Bucheon escort at 09:00."
"Seokhwan covers my shift. Junho handles the junction solo."
"That leaves Sera alone on the afternoon rotation."
"Three hours. She can hold a perimeter for three hours."
He could hear Taeyang not saying the thing about Sera's arm. The thing everyone knew and nobody mentioned because mentioning it would make it operational instead of personal, and operational problems required operational solutions, and the operational solution for a fighter with a compromised weapon arm was to take her off the line.
"I'll keep monitoring the pulse pattern," Taeyang said. "If another one hits while you're in the field, you'll know within minutes."
"Good."
Dohyun hung up. Grabbed his jacket. Left the schedule on the wall with its six names and nine sites and zero margin.
---
Bae Eunseo's clinic was a converted storefront on a commercial street in Anyang, wedged between a phone repair shop and a convenience store. The sign read "Green Cross Mana Therapy" in clean white letters. A C-rank healer doing civilian mana treatments — migraines, joint pain, the low-grade chronic conditions that the post-Awakening medical system was still figuring out how to classify.
Dohyun walked in at 10:40. The waiting room had four chairs, a reception desk, and a woman in her early thirties sorting patient files with the focused efficiency of someone who ran her own business.
"Do you have an appointment?" She didn't look up from the files.
"No. I need to speak with Bae Eunseo."
"That's me. And I'm booked until 14:00." She looked up. Assessed him the way healthcare workers assess walk-ins — quickly, categorizing the complaint by visible symptoms. "If you need mana therapy, I can fit you in at 14:30."
"I'm not a patient. My name is Kang Dohyun. I'm a B-rank hunter, Field Commander class. I need to talk to you about a security concern related to your proximity to mana infrastructure."
The sentence sounded wrong coming out of his mouth. Too formal. Too vague. The language of a security briefing delivered in a storefront clinic to a woman who was trying to see her next patient.
Eunseo set the files down. "A security concern."
"Your clinic is located above a section of sub-surface mana infrastructure. The channels that run through the geological substrate beneath this part of Anyang carry mana flows that interact with the local dungeon ecology. Your mana profile as a C-rank healer makes you — sensitive to those flows. More than a non-Awakened civilian would be."
"I know about the substrate. I work with mana every day. My treatments interact with the ambient mana field." She folded her arms. "What's the security concern?"
How do you tell someone that an eight-hundred-year-old maintenance function is sending recruitment signals through underground channels to modify their mana profile while they sleep? How do you compress the ring circuit, the architects, the gardener, the keystones, the collection mechanism into a sentence that a C-rank clinic healer would believe?
You can't. The information required context that took weeks to build, that came from reading architects' inscriptions in dungeon chambers and tracking sensor anomalies across infrastructure networks and watching two people who'd been modified describe what the gardener had done to their minds.
"There's an entity that operates through the infrastructure," Dohyun said. "It targets Awakened individuals with specific mana profiles. Healers. Sensors. Anyone whose work puts them in sustained contact with mana flows. It modifies their mana signature during sleep. The modification is subtle — the person doesn't know it's happened. They continue their normal activities, but the modification installs a set of behaviors that serve the entity's objectives."
Eunseo stared at him.
"The modification has been confirmed in two individuals so far. Both were Awakened professionals who worked near the infrastructure. Both were unaware of the modification until an external analysis detected the changes in their mana profiles."
"You're saying something is changing people's mana while they sleep."
"Yes."
"Through the ground."
"Through the infrastructure channels in the geological substrate."
She looked at him for a long time. Then she looked at the door. Then back at him.
"I sleep fine," she said. "My mana profile is stable. I run self-diagnostics weekly — it's part of my clinical practice. If something were modifying my signature, I would detect it."
"The modification is designed to be undetectable through standard self-diagnostics. It operates below the threshold of conscious mana perception. The two confirmed cases were identified only through specialized sensor equipment that reads infrastructure-frequency signals."
"And you have this equipment?"
"My team does."
"Then scan me."
The reasonable request. The one he couldn't fulfill because the portable sensor unit was with Minhee in Gwangju and the full network was Taeyang's station outside Bucheon, forty minutes away, and asking a civilian clinic healer to drive to a dungeon gate monitoring station for a mana scan would sound exactly as insane as the rest of this conversation.
"The equipment isn't portable enough for a field scan here. I can arrange a session at our monitoring facility—"
"So you walk into my clinic, tell me an invisible entity is modifying my brain through the floor, and then ask me to come to your facility for testing." She picked the patient files back up. "Mr. Kang, I've had hunters come through here with conspiracy theories before. The Awakening brought out a lot of — creative thinking. I don't mean that dismissively. I understand the stress of operating in a system nobody fully understands. But I can't close my clinic and drive to a monitoring facility on the word of someone I've never met."
"I can have Director Kwon Jihye from the Association's Research Division contact you to verify—"
"I appreciate the offer. If you'd like to make an appointment, I'm available Thursday afternoons." She opened the next patient file. The conversation was over.
Dohyun stood in the clinic's waiting room. Four chairs. A reception desk. A woman who'd just been told she might be the target of an ancient entity and who had responded the way any reasonable person would — by not believing it.
He left. The street outside was bright and ordinary. The convenience store next door was selling bottled coffee. A bus stopped at the corner and released passengers who walked past the clinic without looking at it.
His phone buzzed.
Taeyang: "Fifth pulse. 10:52. Southern arc, Sensor 8. Anyang sector. Two hundred meters from your current location."
Two hundred meters. The pulse had come while he was standing in Eunseo's clinic. While he was trying to explain the gardener to a woman who thought he was delusional, the gardener had reached through the infrastructure directly beneath them.
He looked at the clinic's front window. Eunseo was visible through the glass, working through her patient files. Unaware. Unprotected. Two hundred meters from a recruitment pulse that might or might not have been aimed at her.
Dohyun got in the car. Sat. Pulled the target list from his jacket pocket.
Five names. The pulses were accelerating. One every two hours, trending faster. The gardener had found a delivery method that bypassed its speed limitation. It could reach anyone within the infrastructure's network. Anyone who slept above the channels. Anyone whose mana profile made them useful.
He couldn't guard five people. He couldn't explain the threat in terms civilians would accept. He couldn't scan them without equipment that was deployed at a dungeon gate forty minutes away. He couldn't pull his team from the repair operation or the Bucheon containment or the keystone surveys to run a protection detail on five C and B-rank Awakened who didn't know they were in danger and wouldn't believe him if he told them.
The architects had said the gardener's only limitation was speed.
Speed was no longer the limitation.
He called Taeyang. "The fifth pulse. Identical signature?"
"Identical. Sensor 8 data matches the previous four exactly. Same amplitude, duration, propagation speed."
"Can you predict the next one?"
"The intervals are shrinking but not linearly. The pattern looks — I'd need more data points. But if it continues accelerating, the next pulse could be within ninety minutes."
Ninety minutes. Then an hour. Then thirty minutes. Then continuous. The gardener finding its rhythm, learning to use the infrastructure's channels the way a pianist learns to use a keyboard — slowly at first, then faster, then without thinking.
"I need Kwon to expand the gate restrictions. All five unprotected targets. Immediate."
"Kwon's restrictions work through the booking system. They prevent targets from entering specific dungeons. They don't prevent the gardener from reaching targets in their homes."
"I know. But if these people get modified and the modification drives them toward infrastructure work the way it drove Yeonhwa and Seokhwan, the first thing they'll do is enter nearby dungeons to access the channels. Restricting their gate access is the only choke point we have."
"I'll send the request to Kwon."
"Send it now. Priority."
He hung up. Started the car. The next name on the list was Kang Taehyuk, the C-rank solo clearer in Bucheon. The one sleeping above the 03:55 pulse. Twenty minutes away if traffic cooperated.
Traffic wouldn't cooperate. It was 11:00 on a weekday in greater Seoul. Nothing cooperated.
Dohyun drove. The list sat on the passenger seat. Five names. Five people whose lives were about to be touched by something they'd never heard of, something that operated in channels they couldn't see, something that chose them for proximity and mana sensitivity and the accident of where they'd rented their apartments.
In the first timeline, the gardener had worked slowly. Years. Decades. Patient expansion of its network, one agent at a time, each agent cutting channels they believed they were studying, dismantling the ring circuit with the steady pace of a maintenance function executing its purpose.
The gardener in this timeline had been provoked. Dohyun's team had repaired channels. Deployed batteries. Checked keystones. Broadcast their presence through the infrastructure with every operation, every reading, every pulse of the mana batteries pouring energy into the architects' channels.
The gardener had adapted. Or it had always been capable of this speed and had never needed it before. Eight hundred years of slow, patient work, and then a team of six humans had started undoing that work, and the gardener had looked at its speed limitation and found a way around it.
The way a thermostat doesn't learn. Except when it does.
He pulled onto the highway. Bucheon was ahead. The fifth pulse's echo was still in the sensor data, fading at the speed of infrastructure propagation, reaching into apartments and clinics and offices where Awakened people lived their ordinary lives above extraordinary channels.
Five people. Four pulses. No, five now. Six by the time he reached Bucheon, probably.
The gardener was building its army. And Dohyun was driving a Hyundai through midday traffic, trying to warn people one at a time, by hand, in person, in a language they didn't speak.
The math on that was worse than the schedule.
