The air in the lower tunnels didn't circulate; it vibrated.
Kael's boots hit the slick limestone with a rhythm that mirrored the frantic pulsing of the interface in his peripheral vision.
To his left, the stone wall was a blur of jagged shadows; to his right, Sera's armor clattered—a metallic, desperate percussion that told him she was running on nothing but spite and fading adrenaline.
[COMBAT STATE: MAXIMUM ADRENALINE]
[HEART RATE: 162 BPM — WARNING: STAMINA DEPLETION IMMINENT]
The system didn't care about the burn in his lungs or the way the copper taste of his own blood was coating his tongue again.
It only logged the data.
It registered the way Sera pivoted through a gap between two stalactites so narrow it stripped a layer of soot from her breastplate.
She moved like someone who had memorized the anatomy of the mountain while bleeding out.
"Left!" she hissed, her voice cracking.
Kael didn't question her.
He threw his weight into the turn, his shoulder slamming briefly against the cold, wet rock.
He could hear them now. It wasn't just the howling anymore; it was the sound of a hundred claws scrabbling for purchase on the stone behind them.
A tide of fur and hunger was pouring through the capillaries of the earth, and they were the clogs.
Every time Kael's heart thudded, the violet tether connecting him to Sera flared.
It felt like a hot wire stitched into his spine.
He could feel her fatigue—a heavy, sinking anchor in his own gut. The Bond wasn't just a power boost; it was a shared burden.
They hit a junction where the earth opened into a three-way split.
Sera skidded to a halt, her boots sending a spray of black gravel into the void of the center tunnel.
She reached out, bracing herself against a leaning pillar of granite, her breath coming in jagged, wet heaves.
"The wide one..." she gasped, pointing toward the central arch.
"It leads to the... the cisterns. There's a gate."
She tried to push off the pillar, but her knees buckled.
A violent, racking cough shook her frame, and Kael saw the glint of fresh blood on her lips in the dim light of the bioluminescent moss.
The dented plate over her chest wasn't just damaged; it was pressing into her lungs.
She had been fighting with a collapsed chest cavity for God knows how long.
"Sera," Kael said, stepping toward her.
"Don't," she barked, waving him off with her broken sword.
"I'm fine. Just... the mana. It's gone, Kael. The 'Recognition' or whatever that light was... it took the last of it."
She looked at the tunnels. The howling was closer.
The echoes were losing their distance, turning into the distinct, wet snarls of predators that knew their prey had stopped.
Kael looked at her—this fallen knight who was supposed to be his 'Sword-Heart'—and then at the darkness.
She was the one with the Rank D experience, the one who knew the terrain. But she was broken.
If they kept running, they'd both die in a dead end, exhausted and back-to-back.
Strategy was a luxury for people who weren't covered in monster guts.
For Kael, there was only the itch.
"Go," Kael said. It wasn't a suggestion.
Sera blinked, her icy eyes widening. "What?"
"The gate. Go fix it, or find a way to lock it."
Kael stepped into the mouth of the wide tunnel. He didn't look at his arm, but he felt the heat rising.
"I'm stopping them here."
[SKILL ACTIVATION: BONE BLADE (LVL 1)]
The sound was worse this time—a wet, splintering crack as the humerus refined itself and tore through the scar tissue on his forearm.
The blade didn't just emerge; it pulsed with a frantic, crimson light, casting long, demonic shadows against the tunnel walls.
"You're Rank F, you idiot!" Sera shouted, her voice trembling with a mix of fury and something that sounded suspiciously like fear for someone other than herself.
"You'll be a pile of bones in thirty seconds!"
Kael didn't turn around. He watched the first pair of red eyes ignite in the darkness of the passage ahead.
"Then you better be fast with that gate."
He planted his feet.
The wide tunnel was the only way the full pack could swarm them at once.
By standing here, he was turning himself into a dam.
"Kael—"
"Go!" he roared, the command amplified by the System's resonance.
Sera cursed—a string of soldier's oaths that would have blistered the ears of a priest.
But she didn't argue further. She knew the math of survival.
With a groan of effort that sounded like grinding metal, she threw her weight against the leaning granite pillar that sat between the two smaller tunnels.
Her remaining mana flared once, a pathetic, flickering blue spark, just enough to grease the wheels of physics.
The pillar groaned, cracked, and then came down with a deafening roar.
Dust and debris filled the air as the two narrower side-paths were choked with tons of fallen stone.
The impact vibrated through the floor, nearly knocking Kael off his feet, but he didn't move his gaze from the front.
Sera stayed for one heartbeat, looking at his back—a lone figure silhouetted by a gruesome, blood-red light—and then she turned and vanished into the darkness behind him, her armor clanking rhythmically into the distance.
Now, it was just Kael, the silence, and the smell of approaching death.
The first Slasher Wolverine didn't bark. It launched itself from the ceiling, a shadow detached from the rock.
Kael moved.
He wasn't the clumsy scavenger who had fallen off the bridge.
The System was feeding him the trajectory before the beast's muscles even contracted.
He stepped inside the arc of the leap, the [Bone Blade] humming a low, vibrating note.
Schlick.
He didn't swing for the head. He thrust upward, through the soft underbelly.
The blade sank in up to the elbow.
Kael felt the hot splash of entrails over his hand, but he didn't flinch.
He used the momentum of the falling beast to pivot, swinging the corpse like a flail into the second monster that was charging from the ground.
The two collided in a mess of fur and broken teeth.
[CRITICAL HIT. EXPERIENCE GAINED.]
[DURABILITY WARNING: BONE BLADE AT 82%.]
"Come on then!" Kael screamed, the adrenaline finally overriding the logic of his brain.
Three more surged forward.
The tunnel was wide enough for them to flank him, but Kael kept his back to the wall, moving in a frantic, jagged zig-zag.
He wasn't fighting with technique; he was fighting with a desperate, localized genocide.
He lost a chunk of his tunic to a claw.
He felt a shallow line of fire open up across his thigh.
But every time he was hit, the [Bone Blade] seemed to grow sharper, as if it were drinking the pain.
He was a blur of red light in the dark.
He'd stab, retract, parry, and kick. The floor became a skating rink of black blood.
One wolverine managed to latch onto his left shoulder—the scarred one—and Kael didn't try to shake it off.
He reached up, grabbed the monster's jaw with his bare hand, and shoved the [Bone Blade] through his own bicep to impale the creature's throat.
[MUTUAL DAMAGE DETECTED.]
[BOND RESONANCE INCREASING: 45%... 48%...]
He felt a surge of strength that wasn't his.
Somewhere, deeper in the tunnels, Sera had reached the gate.
He could feel her desperation, her hands fumbling with ancient levers, her heart screaming for him to hold on.
That shared emotion was a drug.
Kael laughed, a jagged, terrifying sound that made the remaining wolverines hesitate.
He stood in the center of the tunnel, surrounded by six twitching corpses.
His blood-red blade was dripping, and his eyes were glowing with a reflected violet hue.
"Is that it?" he gasped, spitting a mouthful of red into the mud.
"Is that all the 'Abyss' has?"
The response was a low, vibrating growl that made the very marrow of his teeth ache.
The remaining pack members suddenly parted, scurrying back into the shadows like beaten curs.
From the darkness of the main tunnel, a massive shape began to unfold.
It didn't walk; it slithered and stepped, a grotesque hybrid of muscle and bone.
The Alpha Slasher.
It was easily the size of a carriage, its fur not black, but a sickly, translucent white that showed the pulsing veins beneath.
Its eyes weren't red; they were a void-like purple, swirling with a malevolent intelligence.
It looked at the bodies of its pack. Then it looked at Kael.
It didn't charge.
It raised a single, massive paw—claws the size of shortswords—and tapped the stone floor.
Cling. Cling. Cling.
It was mocking him.
[DANGER: BEYOND CURRENT CAPACITY.]
[ALPHA SLASHER (EVOLVED). RANK D-.]
[RECOMMENDED ACTION: RUN.]
"Can't run, bird-brain," Kael muttered to the interface.
"I've got a lady waiting."
The Alpha lunged.
It was too fast.
Kael raised his [Bone Blade] to parry, but the force of the strike was like a falling mountain.
The bone shattered—not just the blade, but the bones in Kael's forearm.
He was sent flying backward, his body skipping across the stone floor like a flat stone on a pond.
He hit a pile of debris, the wind knocked out of him, his right arm a mangled mess of white splinters and raw meat.
The Alpha stalked forward, its shadow swallowing him whole.
It opened its maw, revealing rows of serrated teeth coated in a paralytic venom.
Kael tried to reach for the system, for a potion, for anything—but his vision was failing.
Just as the Alpha lowered its head for the final bite, a soft, rhythmic whistling drifted through the air from a crack in the ceiling above.
The Alpha stopped. It froze, its entire body trembling.
Kael looked up, his blurred vision catching a glimpse of a pale, golden light.
A small, porcelain-white hand reached down from a crevice in the rock, holding a single, wilted black rose.
"Poor little king," a voice whispered—a voice that sounded like silk being dragged over a grave.
"So much blood, and yet the throne is still so far away."
The girl with the lantern wasn't there, but the rose fell, drifting through the air with an impossible slowness.
As the rose touched the Alpha's head, the massive beast didn't scream.
It simply... dissolved. Its flesh turned to grey ash, its bones to dust, until there was nothing left but a pile of soot in front of Kael.
The whistling stopped.
Kael stared at the black rose lying in the dust. His heart hammered against his ribs.
Who was watching him?
Then, the light of the rose began to turn a deep, sickly green.
"Kael!"
Sera's voice echoed from the darkness behind him, but she sounded miles away.
The shadows in the corners of the room began to stretch, forming long, spindly fingers that reached toward him.
"The first trial is over," the voice in the dark whispered.
"But the debt... the debt is just beginning."
The green light flared, and Kael felt the world being pulled out from under him.
[SYSTEM ERROR: EXTERNAL INTERFERENCE DETECTED.]
[BOND STABILITY: CRITICAL.]
[NOTICE: YOU ARE NO LONGER ALONE IN THE ABYSS.]
Kael's eyes drifted shut as the darkness swallowed the tunnel.
The last thing he saw was a pair of black, pupil-less eyes watching him from the cracks in the ceiling.
Then, the silence returned.
But it wasn't the silence of peace. It was the silence of a predator waiting for the next act.