The "Combat Arena" of the Sub-Levels was a far cry from the Gilded District's grand stage. Here, in the belly of the mountain, the air was thick with the smell of scorched ozone and ancient oil. The floor wasn't marble; it was a reinforced steel grid, stained with the "Echo-Leavings" of a thousand failed bouts.
"Listen up, you mistakes!"
A woman stood in the center of the grid, her uniform a jagged mess of leather and reinforced mesh. This was Instructor Vane, a woman whose Resonance was so aggressive that the air around her seemed to vibrate with the sound of a hornet's nest. Her Echo, a swarm of metallic shards, hovered behind her like a halo of knives.
"The F-Class is not here to learn how to be Tuners," Vane sneered, her eyes raking over Silas, Jax, and Kael. "You are here to be 'Reactive Targets.' You exist so that the B-Class can learn how to strike moving flesh without wasting their energy on proper warriors."
Across the grid, the B-Class stood in a perfect line. At their head was Lira Valerius, Aurelius's cousin. Unlike Aurelius's brute-force Centurion, Lira's presence was elegant—and far more lethal. She held a flute carved from a human femur, and her Echo, a weeping woman with four arms, drifted behind her.
"Target practice?" Silas whispered, his clay-like skin cracking as he tightened his fists. "They're going to use us as live bait."
"Don't let them hit the center of your chest," Jax murmured, her eyes glazed over as she looked into one of her visions. "The left side hurts more today. I can see the blue fire before it happens."
«...Vane's frequency: 42.0 Hz... Lira's frequency: 38.5 Hz...» Zero's voice was a cold stream of data. «...Warning: Lira is preparing a 'Soul-Laceration' melody. It bypasses physical armor. It targets the vibration of the nervous system...»
"Begin!" Vane barked.
Lira didn't hesitate. She brought the bone flute to her lips.
The sound that emerged wasn't music. It was a high-pitched, screeching dissonant chord that felt like a serrated blade being pulled across the inside of Kael's skull. All around him, the other F-Class students collapsed. Silas fell to his knees, clutching his head as his clay skin began to flake away in great, dusty chunks. Jax curled into a ball, sobbing as the sound forced her "Memory" Echo to play every traumatic moment of her life at once.
"Is that it?" Lira laughed, her four-armed Echo beginning to pluck at invisible strings in the air. "The Zero isn't even screaming. Perhaps he's already dead inside."
She focused her gaze on Kael. The bone flute emitted a sharp, blue pulse of energy—a "Siren's Spike"—aimed directly at Kael's throat.
Kael stood perfectly still. To Lira, it looked like he was paralyzed by fear. In reality, Kael was watching the 0.5-second delay. He saw the blue light leave the flute. He saw the air molecules shatter under the pressure of the sound wave.
«...Absorb...» Zero commanded.
Kael didn't block. He didn't move his hand. He simply released the Vacuum Aura.
The blue spike hit an invisible wall two meters in front of him. But it didn't bounce off. The sound wave simply... flattened. The light was sucked into the air, and the high-pitched screech vanished into a dull, thudding silence.
Kael took a step forward.
"What?" Lira's eyes widened. She played a faster, more violent sequence. The four-armed woman behind her shrieked, launching a barrage of sonic blades that could cut through tank plating.
Kael kept walking.
Every blade that entered his two-meter radius disappeared. The arena, which had been filled with the cacophony of Lira's Echo, began to go quiet as Kael "drank" the sound.
[Sync-Rate: 3.2% -> 3.3%]
[Warning: Excess Resonance Energy detected. Venting to 'Inheritance of Rust'.]
Kael's hand, hidden in his pocket, began to glow with an oily, black light. He could feel the "Siren's" energy trying to thrash inside him, but the Zero System was a relentless grinder. It broke the blue light into grey dust.
"I said you were being too loud," Kael said. His voice was no longer human. It carried the hollow, echoing quality of a deep cavern.
He was in front of her before she could play another note. The B-Class students behind her tried to intervene, but as they entered his Vacuum Aura, their Echoes flickered and died. Their glowing swords turned back into dull metal; their fireballs sputtered out like wet matches.
Kael reached out and grabbed the bone flute.
"Let go!" Lira screamed, her four-armed Echo trying to claw at Kael's face. But its transparent claws simply dissolved as they touched his skin.
Kael didn't pull the flute. He simply tightened his grip.
[Skill Activation: The Inheritance of Rust]
The bone flute—a Class-B Echo Relic worth a fortune—began to turn grey. The ancient, polished marrow started to flake. Cracks raced down the length of the instrument as the "Static" inside Kael's palm scoured the magic from the object.
"No! My inheritance!" Lira wailed.
The flute shattered into a pile of ash in Kael's hand.
The feedback hit Lira like a physical blow. Because her soul was "Tuned" to the instrument, its destruction sent a wave of white noise back into her mind. She collapsed, her eyes rolling back as she fainted from the sudden, absolute silence in her head.
Kael stood over her, his eyes pulsing with ultra-violet light. He looked at Instructor Vane.
The Instructor's halo of knives was vibrating violently, her face a mask of shock and professional fury. "You... you destroyed a Valerius Relic. Do you have any idea what you've done, Nox?"
"I defended myself," Kael said, the Personality Drift making it impossible for him to feel the gravity of the situation. "She was a 'Hunter.' I was a 'Target.' I simply performed my role better than she did."
«...Sync-Rate: 3.5%...» Zero warned. «...The personality core is destabilizing. Re-engage empathy dampeners immediately...»
Kael felt a sharp, cold sting in his brain, and the world suddenly regained its color. The ultraviolet glow in his eyes faded. He looked down at the pile of ash at his feet, then at the unconscious girl.
A heavy silence filled the arena. The B-Class students were staring at him with a terror that surpassed what they felt for the Static-Born. He wasn't just a Null. He was a predator of Echoes.
"F-Class... dismissed," Vane spat out, her hand trembling near her belt of knives. "Nox, you stay. The Headmaster will want a word."
Kael didn't stay. He turned and walked toward Silas and Jax, who were finally standing up, their faces pale and sweaty.
"You okay?" Kael asked, his voice returning to its normal, raspy Sump-tone.
Silas looked at Kael's hand—the one that had just turned a relic to dust. "You... you saved us again. But Kaelen, the Valerius family... they don't forget. You didn't just break a flute. You broke their pride."
"Pride is just a frequency," Kael said, though he didn't quite know why he said it. "It can be erased like anything else."
As they left the arena, Kael felt a sharp pain in his chest. He pulled out his father's old silver pocket watch—the one that had fused with him. The hands, which had been frozen at midnight, had moved.
They were now at 12:00:08.
«...The First Note has been played...» Zero whispered. «...The 0.5-second truth is expanding. Every time you consume a soul-relic, the watch will tick. When it reaches one minute, Kaelen... the first seal will break.»
Kael looked at the watch, then at the 329-day countdown.
He was becoming a monster to save a world that hated him. It was a fair trade, he decided. After all, a Scrubber's job was to get their hands dirty so the rest of the world could stay clean.
He reached the dorms, but he didn't go in. He remembered the note from Elara.
The Library. Midnight.
He looked at the watch in his palm. It was time to find out if his father was a hero, or the architect of the very nightmare Kael was trying to stop.