The guardian moved first.
A blur.
Ren saw the intent—shifted—but still felt the impact graze his shoulder as the strike tore past him. The force alone spun him off balance.
Too fast.
Too precise.
"…Not good," he muttered.
He barely recovered before the second attack came. This one aimed lower—his legs. Ren jumped, twisting mid-air as the blow shattered the ground beneath him. He landed hard, sliding back.
No openings.
No hesitation.
This thing wasn't testing him anymore.
It was trying to kill him efficiently.
Ren steadied his breathing. His core pulsed—stronger than before, but unstable under pressure. The shard in his hand throbbed faintly, like it was waiting for him to push further.
"…Fine," he whispered.
The guardian vanished again.
Ren's eyes sharpened.
There—
A flicker.
Left.
He moved instantly. The strike missed by inches, slamming into the wall behind him. Stone exploded outward.
Ren stepped in—
His hand shot forward, dark energy concentrated tightly around it.
Impact.
This time, the hit landed clean.
Cracks spread across the guardian's chest plating, jagged lines of light flickering beneath the surface.
But still—
It didn't break.
The guardian retaliated instantly.
A backhand strike.
Ren raised his arm—too slow—
The blow connected.
"GHH—!"
He was sent flying, crashing into the far wall. The impact knocked the air from his lungs. Pain flared through his ribs.
For a moment—
Everything blurred.
"…Get up…" he muttered, coughing.
The guardian didn't rush.
It walked toward him slowly.
Controlled.
Certain.
Ren forced himself to stand. His legs trembled, but they held. Barely.
"…You're not like the others," he said, wiping blood from his mouth.
The guardian stopped a few steps away.
Its glowing eyes flickered.
Then—
It spoke.
"…Intruder."
Ren froze.
"…You talk?"
"…Intruder," it repeated, voice low and distorted. "…Unstable. Corrupted."
Ren's expression darkened.
"…Yeah? You don't look perfect either."
The guardian raised its arm. Energy gathered along the glowing lines of its body—brighter than before.
"…Threat level rising."
"…Of course it is," Ren muttered.
The pressure in the chamber spiked.
Ren's core reacted violently.
Pain surged—
Then steadied.
The shard pulsed.
Once.
Twice.
Then—
Something changed.
The energy around Ren didn't just gather.
It compressed.
Tighter.
Sharper.
More focused than before.
Ren blinked. "…What—"
"Adaptation," the distant voice returned.
Ren didn't have time to question it.
The guardian moved again.
Faster than before.
But this time—
Ren moved with it.
Not reacting—
Matching.
He stepped into the attack, twisting just enough to let the strike pass him—then drove his hand forward with everything he had.
The compressed energy surged.
Not explosive.
Focused.
Piercing.
It struck the exact point where the cracks had formed earlier.
For a split second—
Everything froze.
Then—
A sharp, clean sound.
The armor broke.
A section of the guardian's chest shattered inward, revealing a glowing core beneath.
Ren's eyes widened slightly.
"…Got you."
The guardian staggered back for the first time.
But it didn't fall.
Instead—
The light in its core flared violently.
"…Critical damage detected."
Ren's instincts screamed.
"…That doesn't sound good."
The guardian raised both arms.
Energy surged through its entire body, the cracks spreading faster, brighter.
Not weakening—
Overloading.
"…Self-destruct?" Ren muttered. "…You've got to be kidding me."
The chamber shook violently.
Stone cracked.
Symbols flared.
Ren forced himself forward despite the pain.
"…Not happening."
He pushed off the ground, closing the distance in one burst. His core surged—his control slipping slightly under the pressure—but he held it together.
Barely.
The shard pulsed again.
Harder.
Demanding more.
Ren clenched his jaw.
"…Just one more."
He reached the guardian just as the energy peaked.
Time slowed again.
The glow.
The cracks.
The core—
Right there.
Ren drove his hand forward.
Everything he had.
Every bit of control.
Every ounce of will.
The dark energy condensed to a single point—
—and pierced straight into the guardian's core.
Silence.
For one heartbeat.
Then—
The energy collapsed inward.
Not exploding—
Imploding.
The light vanished instantly.
The guardian froze.
Then its entire body cracked apart, fractures spreading rapidly from the center—
—and it fell.
Shattered.
Gone.
The chamber went still.
Ren dropped to one knee, breathing hard, his entire body shaking.
"…That… worked…"
Pain flooded back all at once. His vision swam slightly, but he forced himself to stay conscious.
"…You are learning," the voice said.
Ren let out a weak breath. "…Yeah… at the cost of my life."
The shard pulsed faintly.
Satisfied.
Then—
Something new happened.
The remains of the guardian didn't fade.
Instead—
A faint glow gathered at where its core had been.
Condensing.
Forming.
Ren looked up slowly.
"…Don't tell me…"
The light stabilized into a small object.
A fragment.
Different from the one in his hand—but similar.
Lira's voice echoed faintly in his memory.
"Ren… I think it left something behind."
Ren stared at it, exhausted but focused.
"…So this is how it works."
He pushed himself up slowly.
Step by step.
Ignoring the pain.
Because deeper down—
He already knew.
This wasn't the end.
It was just the next step.