Kai Zerui collapsed during a tournament match on a Wednesday, and nobody understood why.
The Academy ran weekly ranked tournaments — structured matches between students of similar tier, designed to sharpen combat skills and update rankings. Kai was fighting a Tier 4 wind specialist, winning easily, his Alloy Vanguard constructs dominating the arena. Then his metal armor flickered. The constructs stuttered. Kai dropped to one knee.
Calder saw it from the stands. The All Seeing Eye activated on instinct.
The Abyss energy in Kai's core had spiked. Not the slow, gradual accumulation he'd detected before — a sudden surge, as if whatever had been dormant had woken up hungry. The tainted energy was attacking Kai's mana pathways from the inside, disrupting the flow between his core and his constructs.
"Medical!" Instructor Vance shouted.
Fen was in the medical station. He reached Kai in seconds, green healing light already flowing from his hands. The healing energy stabilized Kai's vitals — heartbeat, breathing, mana flow — but it couldn't touch the Abyss corruption. Healing spells and Abyss energy didn't interact well. The green light skittered off the dark traces in Kai's pathways like water off oil.
"What's wrong with him?" Vance demanded.
"Core instability," Fen said. Professional. Controlled. He glanced at Calder in the stands for half a second. "His mana pathways are disrupted. I can stabilize him, but I can't identify the underlying cause."
They carried Kai to the medical wing. The tournament paused. Students murmured. Theories circulated: overtraining, mana exhaustion, genetic core defect.
Nobody mentioned enhancement crystals.
---
Calder visited the medical wing that evening. Kai was conscious, sitting up in bed, his military composure strained but intact. His father's academy pin was on the bedside table — he'd taken it off his collar, which Calder suspected was significant.
"Voss."
"How are you feeling?"
"Like something inside me tried to eat its way out." Kai's jaw worked. "The healers can't find the cause. They ran three core scans. Clean."
"Clean?"
"Standard scans. No anomalies detected." Kai looked at his hands. The metal gauntlets were dismissed, and his bare hands looked surprisingly vulnerable — callused, strong, but trembling. "The collapse lasted twelve seconds. Twelve seconds where I couldn't access my core. Couldn't form constructs. Couldn't move."
"Has it happened before?"
"No. But the last few weeks... my construction speed has been dropping. Micro-delays between intent and manifestation. I assumed it was stress. The exam, the ranking, my father's—" He stopped. "I assumed it was stress."
Calder sat in the visitor's chair. He could see the Abyss energy in Kai's pathways through All Seeing Eye — dark threads, thin but multiplying, woven through the enhancement channels that Kai's "premium" crystals had built. The corruption was using those channels as a highway, spreading from the points where the crystal energy had entered Kai's core.
"When did you start using enhancement crystals?" Calder asked.
Kai's expression shifted. Guarded. "That's a private question."
"It's a relevant question."
"How would enhancement crystals be relevant?"
"Because the symptoms you're describing — construction delays, mana pathway disruption, sudden core shutdown — are consistent with foreign-element contamination. Something is in your pathways that shouldn't be there."
Kai stared at him. "The healers ran three scans."
"Standard scans check for known contaminants. If the contaminant isn't in the database—"
"It wouldn't flag." Kai's face went through something complicated. Not disbelief — recognition. The look of someone who'd been suspecting something and hadn't wanted to confirm it. "I've been using Slate Consortium premium crystals for eight months. My father's advisor recommended them. Said they'd push my growth rate, keep me competitive."
"Stop using them."
"I can't. Without the crystal supplements, my training output drops thirty percent. The rankings—"
"The rankings don't matter if your core collapses."
Kai's hands clenched on the bedsheets. The military composure was cracking, and underneath it was a nineteen-year-old boy who'd been pushing himself to breaking point to live up to a name that was too heavy for anyone's shoulders.
"My father was the strongest Reaper of his generation," Kai said quietly. "Tier 6 Archon. War hero. National legend. Every instructor, every official, every person in my life — they look at me and see his shadow. If I fall behind, if my performance drops, if I'm not the next General Zerui—"
"Then you're still you."
Kai looked at him. "That's not how it works."
"It's exactly how it works. I'm a farm boy from a province that grows wheat. My parents can't cast above Tier 1. Nobody expected anything from me. The only pressure I carry is what I put on myself." Calder leaned forward. "You're destroying your own core because you're afraid of disappointing a man who named his son after himself."
Kai flinched. Literally flinched, the way you'd flinch from a physical blow. "You don't know my father."
"I don't need to. I know you. You're smart. You're strong. You beat me in the ranking match — at a tier where I was holding back, sure, but you still beat me. That's real. The crystals aren't."
The medical wing was quiet. Other beds were occupied — training injuries, mana exhaustion, the usual Academy ailments. Nobody was listening. Nobody was watching the Grand Reaping champion sitting beside his rival's hospital bed, telling him things nobody else would.
"Stop the crystals," Calder said. "Your body will adjust. The contamination will clear slowly — it'll take weeks, maybe months. But you'll recover."
"And in the meantime? My rankings drop. My father hears about it. The instructors notice."
"Tell them you're recovering from the collapse. Vance will give you medical accommodation. Use the time to train without supplements. When you come back, you'll be clean."
Kai was quiet for a long time. His hands slowly unclenched.
"You're not what I expected," he said.
"Nobody ever is."
"I expected the Level 42 candidate to be arrogant. Untouchable. The kind of person who wins because the world arranges itself around them." Kai looked at him. "You're just a guy."
"Farm boy."
"Same thing." Kai picked up his father's pin from the bedside table. Turned it over in his fingers. "I'll stop the crystals."
"Good."
"Voss."
"Yeah?"
"Why do you care? We're competitors. My failure is your advantage."
Calder stood. "I don't need advantages. I need opponents who push me. Hard to push when your core's eating itself."
He left the medical wing. The hallway was dim. Outside, the Capital's lights painted the windows in blue and gold.
---
The next morning, Director Huang summoned Calder to the Bureau.
"I have a mission for you," Huang said. No preamble. The man didn't waste breath.
"What kind?"
"Intelligence. The Slate Consortium has a research facility on the Capital's outskirts. Our analysts believe it's where they process their enhancement crystals. I need confirmation of what the crystals contain."
"Abyss energy."
Huang looked at him. "You already know."
"I scanned a crystal at the supply shop. 0.3% Abyss-class contamination. Trace levels, undetectable by standard identification."
"How did you detect it?"
"I'm thorough."
Huang's expression didn't change, but something shifted behind his eyes — the recalculation of a man who'd thought he understood the extent of his asset's capabilities and was realizing the floor was lower than he'd mapped.
"The Consortium's facility is protected by Tier 5 wards and private security. I need someone who can get in, scan the production process, and get out without alerting Ashren Slate or his people."
"When?"
"This weekend. Night operation. Solo." Huang handed him a data chip. "Facility layout, guard schedules, ward architecture. Study it. Plan your approach. Report back with evidence."
Calder took the chip. The weight of it was negligible. The weight of what it represented — his first real mission for Huang, a step deeper into the shadow role — was considerable.
"One condition," Calder said.
"We've discussed conditions."
"One more. If the evidence confirms Abyss contamination, the students using those crystals need to be treated. Kai Zerui collapsed yesterday. There are others."
Huang studied him. "Treatment will happen after the evidence is secured. The political fallout of accusing the Consortium without proof—"
"I know. Evidence first. But treatment follows."
"Agreed."
Calder left the Bureau with the data chip in his pocket and a mission he'd never trained for sitting in his chest beside the void. Infiltration. Espionage. The work that happened in shadows, far from arena lights and ranked tournaments.
The work that kept nations alive while they slept.
He walked back to the Academy. Somewhere on the Capital's outskirts, a facility full of poisoned crystals waited for a farm boy who could see what nobody else could.
Three days to prepare. Then he'd walk into the Consortium's heart and pull out proof of what they'd been feeding to Daishan's children.
The thought should have been frightening. It was satisfying instead, in the same way harvesting a ripe field was satisfying.
Cut. Stack. Clear.
