Kai could hear his own heartbeat.
Loud.
Violent.
Alive.
It echoed in his ears like a war drum, each pulse sending something new through his veins. Not just adrenaline. Not just fear.
Power.
Raw. Unstable. Rising.
His fingers tightened slowly around the dagger, the metal biting into his skin as if trying to remind him this was still real.
Because everything else didn't feel real anymore.
The world had changed.
The creature in front of him hadn't moved yet.
But Kai knew why.
It was watching him.
Carefully.
The same way a predator watches something it no longer fully understands.
"…You feel it too."
His voice came out low, steady.
Different.
The system pulsed again.
[Evolution Burst Active]
[All physical parameters temporarily enhanced]
[Warning: Duration limited]
Limited.
So this was not power he could rely on forever.
That made it simple.
He either ended this now…
Or he died.
The ground beneath his feet cracked as he stepped forward.
Not rushed.
Not reckless.
Controlled.
The creature reacted instantly.
It vanished again.
But this time—
Kai followed.
His body moved before the afterimage even faded, twisting to the side as the claw ripped through the air beside him. The speed was still terrifying.
But it was no longer untouchable.
Kai stepped in closer.
Too close.
The creature's second strike came from above.
Kai raised his arm instinctively, not to block, but to redirect.
The claw slammed against him.
Pain exploded through his bones.
But he didn't get thrown back.
He held.
Just barely.
"…got you."
The words slipped out before he realized it.
The creature's movement slowed for a fraction of a second.
That was all he needed.
Kai drove the dagger forward again.
Same spot.
Same gap.
But this time—
With everything behind it.
CRACK
The resistance broke.
The blade sank deeper than before.
Not enough.
But deeper.
The creature let out a low, distorted sound.
Not a roar.
Not pain.
Something else.
Something closer to… anger.
Kai's eyes widened slightly.
"…so you do feel it."
That meant it could be hurt.
That meant it could be killed.
The creature reacted instantly.
Its free arm moved faster than before.
Kai saw it.
But his body couldn't fully keep up this time.
Impact.
His vision snapped white as the blow connected, sending him crashing across the ground again.
The world spun.
Sound disappeared.
Then rushed back all at once.
Kai forced himself up.
Barely.
His legs shook.
His grip weakened.
Blood dripped freely from his side now, staining the ground beneath him.
[Evolution Burst Duration: 37% Remaining]
"…Not enough."
His breathing grew heavier.
He could feel it already.
The power fading.
Slowly.
But definitely.
If it ran out now…
He wouldn't survive another hit.
The creature approached again.
Slower this time.
Cautious.
It had learned.
It would not make the same mistake twice.
Kai wiped the blood from his mouth with the back of his hand.
His thoughts raced.
Not in panic.
In calculation.
He couldn't overpower it.
He couldn't outlast it.
So there was only one option left.
"…I have to go deeper."
The words barely left his lips before the system reacted.
[Warning]
[Further evolution may cause irreversible changes]
[Proceed?]
Kai laughed.
Soft.
Broken.
"…You're asking me that now?"
His eyes lifted.
Locked onto the creature.
The thing that was about to kill him.
Again.
"…If I don't…"
He tightened his grip.
"…I die anyway."
Silence.
Then—
[Condition Accepted]
[Evolution Burst Output Increasing]
Something snapped inside him.
Not physically.
Something deeper.
The power surged again.
Stronger.
Wilder.
Unstable.
His vision sharpened to an unnatural level.
Every movement of the creature became clearer.
Every shift.
Every breath.
Every intent.
But at the same time—
Something else faded.
His fear.
His hesitation.
His limits.
Kai took a step forward.
Faster than before.
The ground shattered beneath him.
The creature reacted.
Too slow.
For the first time—
Too slow.
Kai slipped past its strike completely, his body moving like he had done this a thousand times before.
His dagger rose.
Then fell.
Again.
And again.
And again.
Each strike aimed at the same point.
Each strike deeper than the last.
The creature thrashed violently, its massive body tearing through the surroundings, but Kai stayed close.
Too close.
Where its power couldn't fully reach.
Blood splattered across his face.
Warm.
Thick.
Real.
But he didn't stop.
He couldn't.
He didn't want to.
[Warning]
[Host mental state deviating]
Kai didn't see it.
Didn't hear it.
All he saw—
Was the gap.
All he felt—
Was the need to break through it.
The creature's movements became erratic.
Unstable.
Weakening.
Kai drove the dagger one final time.
With everything left.
SHATTER
Something gave way.
Not just flesh.
Something deeper.
The creature froze.
Its body locked in place.
The violet glow in its eyes flickered violently.
Then—
Cracked.
Kai staggered back slightly, breathing hard.
"…Did I…"
The creature twitched once.
Then collapsed.
The impact shook the ground.
Silence followed.
Heavy.
Unreal.
Kai stood there.
Frozen.
Waiting.
But nothing happened.
The thing didn't move again.
It was over.
He survived.
Again.
Kai let out a slow breath.
His body finally gave in, dropping to one knee.
"…I'm still here."
The system flickered.
Brighter than ever before.
[You have defeated an Unknown Entity]
[Calculating rewards…]
Kai lifted his head slowly.
Something about this felt different.
Bigger.
More important.
[Error]
[Reward Calculation Failed]
[Unknown Data Acquired]
Kai frowned.
"…Unknown… data?"
The air around the creature's corpse shifted.
A faint, dark glow began to rise from it.
Not like energy.
Not like anything he had seen before.
It moved toward him.
Slowly.
Inevitably.
Kai tried to move.
His body didn't respond fast enough.
The glow reached him.
And sank into his chest.
Everything went silent.
Kai's eyes widened.
"…what did you just give me…"