And Then There Was One

The Reunion

The mountain peak trembled as the air itself twisted with dark energy.

Then—eight portals ripped open, surrounding Hikaru.

One by one—his allies stepped through.

Ikazuchi. Haruto. Moriya. Reito. Daichi. Sora. Tetsuya. Yami.

Their bodies battered and bruised, yet their eyes burned with determination.

They had survived.

And now—they were here.

Hikaru exhaled sharply, relief washing over him.

But then—a shadow moved.

His body tensed.

They all turned—

And there, perched atop the highest cliff, staring down at them—

Sinister X.

He was waiting.

Watching.

Amused.

Then—he moved.

Sinister X

Sinister X stood from his perch, his long black coat billowing in the wind.

Then—without hesitation—

He jumped.

WHOOSH!

The wind screamed as he plummeted—

Then—BAM!

He landed gracefully, standing right in front of them.

Not a single movement wasted.

Not a single ounce of fear.

Just pure confidence.

His crimson eyes flickered beneath his mask.

"…Let's see what you've got."

Then—he attacked.

Hand-to-Hand Combat

Sinister X rushed forward, faster than anyone could react.

BAM!

His fist slammed into Reito's gut, sending the Ice Element flying.

CRACK!

Before Moriya could counter, Sinister X spun, his elbow slamming into Moriya's jaw.

WHOOSH!

Haruto launched a water strike, but Sinister X sidestepped effortlessly, grabbing Haruto's arm and flipping him into the ground.

The others tried to strike, but every movement—every punch, every kick—

Sinister X dodged them all with precision.

Hikaru watched carefully.

Something was off.

Sinister X's movements—they weren't random.

They weren't chaotic.

They were calculated.

They were…familiar.

Hikaru's eyes widened.

This was—

Teshii's fighting style.

The First Counterattack

WHOOSH!

A sudden gust of wind howled through the battlefield—

BAM!

Sinister X was blown away, skidding across the dirt.

Sora hovered midair, arms crossed, his eyes burning with defiance.

"Don't underestimate us."

Sinister X stood up slowly, dusting himself off.

His eyes flickered with something dangerous.

Then—

He reached up—

And slowly lifted his mask halfway.

A smirk.

Then—he exhaled.

The Element of Fire Awakens

WHOOSH!

A bursting inferno erupted from his mouth, engulfing everything in its path.

The Elements barely dodged, rolling across the ground as the mountain peak ignited.

The heat was unbearable.

The very air burned.

Some of them weren't fast enough—

Reito, Moriya, Daichi—scorched by the intensity.

Sora's wind pushed the flames back, but—

When the fire finally settled…

Sinister X was gone.

A Death Blow

A chill ran down Hikaru's spine.

Something was wrong.

Then—

BAM!

Tetsuya gasped, his body jerking forward.

A blade had pierced his stomach.

The blade—an arm.

Sinister X stood behind him, his arm transformed into a steel blade.

The exact same ability as—

Hikaru's heart dropped.

"No… no, it can't be—"

The Truth of Sinister X – The Power of Theft

Sinister X slowly pulled his arm free, letting Tetsuya collapse onto the dirt.

Blood dripped from his blade-like limb.

Then—he turned to the others.

"…Surprised?"

His voice was calm.

Hikaru's fists clenched.

"You… you have Teshii's power."

Sinister X's smirk widened.

"Oh, I don't just have his power."

His red eyes gleamed.

"I took it."

The air grew deathly silent.

Sinister X stepped forward.

"My ability is called 'Theft.'"

His smile faded.

"I can borrow another mutant's ability for ten minutes."

His voice darkened.

"But when I kill them…"

His arm shifted back to normal.

"…I steal it permanently."

Hikaru's breath hitched.

It all made sense now.

Why Sinister X had been watching each battle.

Why he hadn't interfered.

Why he knew their every move.

He had taken the powers of every fallen mutant—

And now…

He was the Element of Fire.

And the most dangerous enemy they had ever faced.