The moment crystallized between two ultimate forms hovering in apocalyptic silence, power radiating from their bodies in visible waves that warped the reality itself.
My Sin Devil Trigger-enhanced Assault Mode versus Vali's Juggernaut Drive.
Reality trembled with each passing second.
[[ COME ]]
My voice roared across dimensions, layered with frequencies that shouldn't exist in mortal throats. The four wings on my back snapped open wider, each feather crystalline and edged with crackling blue energy that hissed like plasma cutting through vacuum. My tail lashed once.
**CRACK!**
Carving a trench twenty meters long through reinforced stone, the barbed tip gleaming with concentrated demonic malice.
Above me, Vali's Juggernaut Drive form roared.
The bellow tore through the fabric of space itself, a noise that registered as wrongness in every observer's hindbrain, not quite dragon, not quite devil, something fundamentally broken that made reality recoil.
Then we moved.
*BOOM!*
The shockwave from our collision obliterated the street beneath us. Buildings within a hundred meters didn't crumble, they disintegrated, scattering as dust. Windows shattered in cascading waves spreading outward like ripples, each pane exploding* in crystalline showers that caught the dim light, transforming the battlefield into a galaxy of deadly glass shards.
My arm-mounted blades screamed against Vali's claws.
**SCREEEEEECH!**
Metal shrieked its death song, dragons howled defiance through steel, the fundamental laws of physics begged for mercy in frequencies only we could hear. Sparks *erupted* in cascading showers—white lightning meeting dark blue energy, each collision bright enough to sear afterimages into retinas, hot enough to ignite the air itself.
I twisted, using my four wings for impossible aerial maneuverability that defied momentum and mass. My tail whipped around, aiming for Vali's exposed side with enough force to pulverize tank armor.
[[ DIVIDE ]]
Albion's voice thundered from the armor.
The tail halved in size.
Then halved again.
And again.
Until it snapped back to normal length, demonic regeneration overwhelming the White Dragon's power through sheer concentrated force, cells rewriting themselves faster than Half Dimension could process.
"Interesting" I growled, voice layered with something ancient and hungry.
We separated. Hovered. Circled each other like apex predators who'd finally found prey that could bite back.
---
[ 3rd Person POV ]
Below, the faction leaders had retreated to what they hoped was a safe distance.
Buildings collapsed from ambient pressure alone, structural steel bending like wet cardboard under the weight of power that saturated the air. The sky above had darkened to bruised purple, clouds swirling in unnatural patterns, drawn by the gravity well of their combined auras.
Rias clutched at her chest, lungs straining against pressure that made each breath feel like breathing for last time. Even from three hundred meters away, the sheer weight of their auras made movement difficult.
"This.... is" Akeno whispered, voice barely audible over the ambient *thrum* of power "They're... they're fighting on a different level entirely"
Grayfia's eyes never left Isaiah's form. That kind face she'd known—the gentle smile, the considerate questions about her day replaced by something that looked carved from nightmares and dipped in moonlight made manifest. The demonic marks blazed across his face in intricate patterns, glowing with blue fire that cast dancing shadows across transformed features.
"No he" she breathed, silver eyes wide "He really is.."
Sirzechs pressed a hand on her shoulder, grip firm enough to anchor. His expression cycled through pride, concern, fascination, and underneath it all, genuine worry. Not for himself. For what might happen if either combatant truly lost control, if power of this magnitude decided civilization was negotiable.
But Isaiah wasn't losing control.
He was in perfect control.
And somehow, that was far more terrifying.
---
[ Isaiah's POV ]
[[ YOUR POWER IS IMPRESSIVE ]] Vali's voice *echoed* from the draconic horror that was Juggernaut Drive, layered with Albion's resonance until each word felt like being hit by sound given physical form [[ BUT HALF DIMENSION IS ABSOLUTE ]]
"Is it?"
I raised one clawed hand. Behind me, the air rippled, not with swords this time, but with concentrated demonic energy shaped into perfect spheres. Each one pulsed with dark purple power that looked almost alive, cores swirling with contained fury.
"[[ Hellblaze ]]"
Meliodas's signature technique, filtered through my demonic essence, amplified by Sin Devil Trigger's power until it transcended its original purpose.
I thrusted my hand forward.
*FWOOOOSH!*
Twenty spheres of concentrated hellfire launched towards Vali, trailing black flames that burned existence itself, leaving streaks of absolute darkness in their wake.
[[ HALF DIMENSION ]] [[ HALF DIMENSION ]] [[ HALF DIMENSION ]]
Albion's voice hammered through reality, desperate and vary.
The first three spheres halved. Shrunk. Vanished into non-existence.
But hellfire doesn't obey normal physical laws. It's demonic, not quite the energy existing in that space between definitions where rules become suggestions.
The fourth sphere punched through and hit Vali's shoulder.
**BOOOOOOM!**
Black flames erupted, clinging to white armor like living hatred given form. Vali roared, wings beating frantically to create distance, but hellfire doesn't extinguish through normal means. It burns until there's nothing left to burn, feeding on demonic energy itself, a parasite made of fire.
[[ DIVIDE ]]
He tried halving the flames.
They splitted.
Became two smaller flame orbs heading straight at him with pure malice.
Each one still burning with the same intensity, doubling the problem instead of solving it.
"You can't halve which is never a complete in first place" I said, voice carrying across the battlefield with unnatural clarity.
Vergil's teleportation merged with my demonic speed, folding space. Reality bent, and suddenly I was behind Vali, arm-blades extending with metallic screech, tail coiled to strike, wings spread to block any escape.
Time seemed to slow down for me.
Vali began to turn, Albion screaming warnings through their mental link, Juggernaut Drive's overwhelming power compensate for the sudden spatial displacement.
My blade pierced straight through his armor.
Just an inch.
But it was enough.
My demonic energy, corrupted, weaponized, shaped by both Assault Mode and Sin Devil Trigger into pure malevolence into his wounds. Not to destroy. To corrupt. To turn Vali's own power against itself, inserting malice into his form, making his strength eat him from within.
[[ IMPOSSIBLE! ]]
Albion's voice carried genuine shock, the first crack in mechanical certainty.
Vali screamed in agony and rage.
The Demonic Power exploded from Juggernaut Drive, a shockwave that could've leveled cities, compressed into a sphere barely twenty meters across having enough force to crack continents, density warping spacetime around its edges.
I was thrown back, tumbled through the air, sky and found myself with wings spread, skidding to a stop hovering a hundred meters away, air shrieking past my armor-like skin.
My chest heaved or would have, if this form needed breath. Devil - Demonic energy swirled around me in visible currents, blue light knitting cracks that had appeared in my armor-like skin, sealing wounds that shouldn't have existed.
Across from me, Vali hovered. His Juggernaut Drive form was damaged, cracked in spiderweb patterns, one wing hanging at the wrong angle with crystalline feathers broken and dulled, hellfire still burning in patches across his body, eating slowly but inevitably.
But he was smiling.
What a battle maniac.
I could feel it. Even through the monstrous transformation, through layers of draconic power and cursed energy that should've consumed his sanity, Vali Lucifer was experiencing pure, unfiltered joy.
[[ THIS IS IT! ]] His voice resonated with Albion's, doubled, tripled, echoing across dimensions like a lighting struck in multiple realities simultaneously [[ THIS IS WHAT I'VE BEEN SEARCHING FOR ALL THIS TIME! ]]
[[ AN OPPONENT WHO CAN TRULY PUSH ME TO MY LIMITS!!! ]]
"Then let me show you" I said, raising one hand "what exists beyond those limits"
---
[ 3rd Person POV ]
"They're going to destroy the entire city at this rate," Sona's voice strained, hands trembling as she maintained barriers to protect the gathered Devils, Fallen Angels, and civilains who'd clustered at what they thought was a safe distance.
Only to realize there was no safe distance.
Not from this.
Michael's expression remained serene "This level of power... I haven't witnessed anything like this since the Great War."
"It's worse than that" Azazel said, voice carrying unusual gravity "During the Great War, we had armies. Thousands of soldiers, hundreds of high-ranking individuals spreading destruction across battlefields. This?" He gestured at the two figures locked in apocalyptic combat with something that might've been academic fascination "This is two individuals who've somehow achieved power that would've shifted outcomes of entire battlefields all alone"
His eyes tracked Isaiah's movements with precision, mind already racing through implications and applications.
Azazel's voice barely rose above a whisper "And one of them is supposed to be a high school student"
"Supposed to be" Serafall echoed, all cheerfulness stripped away, revealing the Maou beneath the magical girl facade "But I don't think he ever was"
Above, Isaiah's form shifted once again.
His four wings folded inward, with four snaps one by one.
*BOOOOOM!*
Then, explosion shot outward in a corona of dark blue energy that painted the sky in shades of blue black midnight. The tail extended, barbed tip gleaming with overwhelming power that made the air warparound it. The arm-mounted blades grew longer, sharper, edges lined with what looked like spatial distortions that cut the light itself.
And his aura changed once again.
Aura ( +++++ )
Where before it had been overwhelming, now it became absolute. Not larger, but more dense. Like watching a star collapse into a black hole, mass compressing into impossible density, the universe itself bending around him to accommodate an existence it couldn't quite process.
Sirzechs's eyes widened, his arm flickering involuntarily in response to what he was witnessing"That's....not possible."
"What?" Rias snapped her gaze to her brother, fear bleeding through her voice.
"He's compressing his demonic power within himself" Sirzechs's voice carried genuine awe, the tone of someone witnessing something that rewrote their understanding of reality "Making it denser until he became one with it. That technique... that's something only the most ancient Devils mastered after *millennia* of practice. And he's doing it instinctively"
"What an interesting night, this turning out to be" Azazel's goatee quivered "Fascinating. Absolutely fascinating. I wonder if I could replicate that replicate in an artificial Sacred Gear"
"...."
---
[ Isaiah's POV ]
I could feel it now, the limit. The absolute edge of what this combined form could achieve, the point where power met control and both screamed for resolution.
Assault Mode from Meliodas, granting overwhelming demonic power and enhanced physical capabilities that pushed flesh beyond its normal boundaries.
Sin Devil Trigger from Vergil, providing refined control, devastating techniques, and power that bordered on divine without quite crossing that line.
Together, they created something new. Something that hadn't existed before in any iteration of reality.
And I was about to push it to the breaking point with my final decisive attack.
[[ COME THEN ]] Vali roared, Juggernaut Drive's power spiraling to new heights, white energy erupting from every crack in his armor. The curse that should've been devouring his sanity, his life, his very soul—he'd *turned* it into fuel. Pure, reckless madness channeled into raw destructive potential.
His form *blurred*.
Not teleportation.
But, pure *speed*.
Faster than sound, sonic booms detonating with each wing beat. Faster than most beings could track, white armor leaving afterimages that confused the eye, made targeting impossible. Claws extended, fangs bared through that horrible mouth, wings creating pressure waves strong enough to shatter stone, Vali Lucifer came at me with everything he had.
I smirked.
Raised Yamato, which I'd drawn without conscious thought, the katana materializing in my hand like it had always been there, waiting for this exact moment.
And I spoke one word:
"[[ Judgment ]]"
Time froze.
Not literally. But close enough that the distinction didn't matter to anyone watching.
My perception accelerated to levels that made normal reality seem like slow motion photography. Every molecule of air vibrating at different frequencies. Every photon of light traveling its predetermined path. Every minute fluctuation in the space between spaces, I could see it all, process it all, understand it all.
Yamato vibrated excitedly in my hand, blade vibrating at frequencies that cut through more than matter.
The blade that cuts through anything. The sword that divides. The weapon that makes no distinction between matter, energy, space, or dimension.
Vali was five meters away, claws reaching forward to tear through my throat.
Four meters, power concentrating into points sharp enough to pierce mountains.
Three meters, killing intent became visible and tangible.
Two meters, victory already forming in his mind, the taste of triumph on his tongue.
But, I moved very fast.
Yamato traced through space, not a slash, not a cut, just...movement. The blade existed in one position, then another, and the universe scrambled to figure out what that meant for everything between those two points, reality catching up seconds late to decisions already made.
A line appeared in the air.
Thin. Precise. Glowing with dark blue energy that looked like concentrated midnight.
SLASH!
SLASH!
SLASH!
SLASH!
SLASH!
SLASH!
SLASH!
SLASH!
SLASH!
SLASH!
SLASH!
SLASH!
...
...
...
..
....
Crisscrossing. Overlapping. Intersecting at angles that shouldn't exist in three-dimensional space, creating a four-dimensional web of spatial severance, each line a point where reality had been politely asked to separate itself and had reluctantly agreed.
"[[ Cut End ]]"
One meter.
The lines activated.
*SSSSSSSHHHHHING!*
Space itself shrieked, the sound of existence being edited, reality's source code being rewritten in real-time.
---
[ 3rd Person POV ]
Everyone witnessed wide eyed.
The lines didn't just appear, they manifested, blue light erupting in multiple lined patterns that formed a three-dimensional cage around Vali's charging form.
For a single frozen moment, Vali's eyes widened behind his helmet.
Yellow irises dilated with sudden, complete understanding.
The lines didn't just cut his armor.
They cut everything.
Juggernaut Drive—the cursed form powered by the White Dragon Emperor's forbidden technique—*separated* along blue lines, white armor peeling away in geometric segments that followed laws of mathematics no human had ever theorized.
Divine Dividing—one of the Thirteen Longinus, a Sacred Gear that had shaped history, shattered, the core crystal that housed Albion's consciousness splitting into infinite fragments.
Flesh.
Bone.
Soul.
All divided along those perfect lines, separated with surgical precision that made the Grim Reaper look clumsy.
[This is Judgment Cut End ]
Isaiah's voice rang across the battlefield, cold and final.
[ The technique that severs all ]
The spatial cuts activated fully.
Vali Lucifer—White Dragon Emperor, descendant of the original Lucifer, battle genius who'd sought the ultimate fight his entire life disintegrated.
His body separated along the lines Isaiah had drawn, divided into segments that simply... stopped existing. Juggernaut Drive dissolved first, white armor turning to motes of light that scattered on non-existent wind. Then Divine Dividing's core, green crystal fracturing into fragments that blinked out of reality one by one. Then the man himself, flesh and bone and blood all separating, dividing, ceasing.
Like an image being erased one pixel at a time by the universe's most careful editor.
Clean.
Absolute.
Final.
[[ PARTNER—NO—I DON'T WANT TO—NOT LIKE THIS— ]]
Albion's voice cut off mid-scream as the Sacred Gear ceased to exist, the Vanishing Dragon's consciousness scattered across dimensions with no anchor point, no way to return.
The White Dragon Emperor was no more.
Silence crashed across the battlefield like a physical weight, pressure differential making ears pop as displaced air rushed to fill the space where Vali had been.
Where Vali had been, there was simply... nothing. No body. No blood. No trace that he'd ever existed except for the memory of their battle and the destruction surrounding them in all directions.
Isaiah stood there, Yamato still extended, blade gleaming with dark blue energy that slowly faded back into the katana's normal silver sheen.
Then he sheathed it.
One smooth motion.
*Click*
The sound of finality, of doors closing, of stories ending.
---
The battlefield had gone silent.
Whether it was Devils, Fallen Angels, Angels or their faction leaders, they stood frozen not from awe, but from absolute shock of what they just witnessed.
They'd just witnessed an execution with no dramatic last words. No heroic sacrifice. No chance for redemption or last-minute rescue, which I hated.
Just... deletion from very existence.
The White Dragon Emperor was dead.
Azazel stood motionless.
His face cycled through expressions rapidly from something that might've been grief, then back to analytical interest. His eyes fixed on the empty space where Vali had been, his mind already racing through implications.
The boy he'd found on the streets, abused and broken.
The student he'd trained, taught, raised as close to a son as a Fallen Angel could manage.
The battle maniac who'd always been heading toward this exact outcome, just a question of when and how.
Now he was erased from existence by a technique so precise it left no body to mourn, no grave to visit, no physical evidence except memory.
"Well," Azazel said finally, voice carrying his laid-back tone despite the situation "I did *not* see that coming. The Juggernaut Drive defeat, yes. The alignment with Khaos Brigade, obviously. But spatial deletion with a sword?" He turned to Sirzechs, goatee twitching with scientific curiosity "That's new"
Azazel's voice didn't change, but something flickered behind his eyes "I always knew he would keep finding someone stronger, pushing until something broke, dying in battle doing what he loved." He shrugged "Could've been worse. Could've been Samael's curse, or Trihexa, or old age and regret. At least he got his perfect fight"
Sirzechs's expression had gone carefully neutral with a look of someone who'd just watched a game-changing piece get removed from the board and was calculating implications faster than most people could process shock "The peace treaty still stands" he said, voice firm and carrying across the battlefield. "What happened here was a rogue member acting against his faction's interests. Not a declaration of war, Right?"
Michael nodded slowly "Agreed. The Fallen Angels cannot be held responsible for an individual who explicitly rejected their authority"
"Then we're done here" Isaiah said, voice hoarse, body swaying slightly as the combined forms began to dissolve.
---
[ Isaiah's POV ]
My Sin Devil Trigger form dissolved, power settling back into Assault Mode's familiar form. Then that too faded, demonic marks receding back toward my forehead, wings folding away into non-existence, returning me to something almost human.
I was breathing hard. Every muscle ached, deep bone-tiredness that came from pushing past every limit. My demonic energy reserves were nearly depleted—both forms together had consumed power at a rate that would've killed a normal Devil in seconds, burned them from inside out.
But I was still standing.
And Vali wasn't.
The reality of that settled over me like a mountain pressing down on shoulders that suddenly felt too small to carry it.
I'd killed someone who could've been an essential. Not in defense of an immediate attack. Not in a blind rage where I could claim temporary insanity.
Deliberately.
With full awareness of what I was doing and what it would mean, what doors it would close, what lines it would cross.
Vali Lucifer had chosen his path. Aligned with terrorists organisation. Rejected peace. Forced this confrontation.
But I'd been the one to end it.
The one to draw the line and say: no further.
I looked at my hand. It wasn't shaking. Wasn't trembling with horror or guilt or regret.
Just... tired.
Is that good or bad?
I didn't know.
Didn't know if I wanted to know anymore.
Around me, the faction leaders approached slowly. The atmosphere had shifted from diplomatic conference to something far more somber, like a funeral no one had planned for.
Azazel reached me first.
He was relaxed, almost casual like this wasn't such a big matter to him, but who knows how much hurt he was deep down in his heart.
"Gotta say, that was the cleanest execution I've seen in about three thousand years" His voice carried genuine academic interest.
"Azazel" Grayfia interrupted.
"Fine, fine. Inappropriate timing. I'll ask later" But his eyes never stopped analyzing, gears turning behind that laid-back facade, mind already three steps ahead planning experiments.
Sirzechs stepped forward, power radiating from him in controlled waves, establishing presence without hostility. His expression was of respect, underneath it all was something that might've been sympathy.
A new White Dragon Emperor would rise someday.
But it won't ever be strong as Vali.
Farewell.
. . .
For supporting me and for advance chapters, you can check on
p a treon.com/opeler
Replace * with a