Kurotsuki Renya did not invoke the full, destructive output of his Bankai.
He required pressure not annihilation.
The purpose of this battle was cellular stimulation under extreme Reiatsu compression. If he unleashed the totality of his Bankai's range, Las Noches itself would be drawn into the storm.
He instead invoked only the manifested aspect of his Bankai:
Nine Heavens Responding Thunder — Universal Heavenly Sovereign.
As the release command left his lips, a colossal figure formed behind him
a towering avatar composed entirely of condensed lightning. It bore neither armor nor flesh, but the outline of a divine executor wrought from thunder itself.
The figure stepped forward
and merged into Renya's body.
BOOM.
Electric arcs burst from his eyes, nostrils, mouth, and ears before stabilizing inward. Deep-blue lightning armor condensed across his form, fitted tightly against his frame like a second skin of plasma.
Behind him, six spheres of condensed lightning—resembling magatama formed from compressed Reiatsu materialized and began orbiting in precise rotation.
Ginjo narrowed his eyes.
"That pressure… It's rising beyond standard Captain-class output."
Harribel spoke calmly.
"Follow the strategy. Do not allow him to dictate distance."
The moment she finished speaking, vast tidal currents surged from nothingness. Though they stood in Hueco Mundo's desert, Harribel's Reiatsu condensed atmospheric moisture into a roiling ocean that rose skyward.
The sea swallowed her figure
and then crashed toward Renya.
Renya vanished with a burst of Shunpo, reappearing high above.
But the instant he stabilized
Nelliel appeared behind him.
Her refined antelope form moved with terrifying acceleration. Spiritual energy condensed along her arm into a lance of emerald reishi, driving toward Renya's spine.
Renya blurred again
but the air distorted violently.
Below, Ginjo slammed his hooves into the air itself.
Fullbring-enhanced shockwaves rippled outward, compressing the atmosphere. The distortion disrupted Renya's Shunpo trajectory.
His lightning armor flickered.
At that precise instant
Ulquiorra appeared above him in Segunda Etapa, black wings tearing through the night sky. In his hand formed a condensed spear of violent green energy.
Lanza del Relámpago.
Below
Tsukishima, in his massive serpentine Hollow form, lunged upward with fanged jaws wide, aiming to sever Renya at the legs.
Renya reacted instantly.
His left hand rose
CRACK.
He caught Ulquiorra's spear mid-thrust and crushed it in his palm before detonation.
His right hand slammed downward, gripping the serpent's upper jaw. Lightning erupted through Tsukishima's entire body, thunder roaring across the desert.
The serpent recoiled, smoke rising from scorched scales, yet he remained combat-capable.
The combined assault, however, stalled Renya's momentum.
And that was enough.
The ocean crashed upward again.
From within the surge, Harribel emerged, water spiraling around her arm like a pressurized blade. She struck toward Renya's back.
Renya pivoted
but Ulquiorra seized his arm mid-motion.
Harribel's strike connected.
Renya blocked with his forearm, lightning erupting on impact. Harribel twisted, locking his wrist. Ulquiorra reinforced the hold from the opposite side.
For a fraction of a second
Renya was restrained.
Nelliel appeared again.
Her emerald lance spiraled forward in a drilling thrust aimed directly at his spine.
Simultaneously
Ginjo opened his mouth.
A crimson beam of compressed Reiatsu erupted outward
A Hollow-class Cero augmented by Fullbring resonance.
Renya's lightning armor flared violently.
The six lightning spheres behind him rotated in perfect synchronization, merging to form a circular shield of condensed thunder.
Ginjo's Cero struck
and deflected, redirected sideways in a violent arc that forced Ulquiorra to shield with his wings.
Nelliel's lance struck the shield
and detonated in a massive explosion that blasted Harribel backward.
Renya tore free and ascended rapidly, creating vertical distance.
But Harribel's sea obeyed her will.
The tide inverted, surging upward like a sky-falling abyss.
Nelliel pursued again, striking repeatedly with rapid thrusts.
Renya formed a blade of condensed lightning in his right hand and countered strike for strike. Each clash discharged arcs that shredded the surrounding air.
He forced Nelliel back
but Ulquiorra was already upon him again.
Their exchange accelerated beyond visible perception. Blade against lightning. Wing against thunder.
Renya held superiority one-on-two
but the battlefield itself turned hostile.
The ocean surged again.
Renya detonated lightning outward in a radial burst, electrifying the sea into vapor.
Harribel erupted from within the steam and slammed both hands downward toward his skull.
The six lightning spheres spun outward and intercepted
BOOM.
The explosion hurled Harribel back across the desert.
Ulquiorra and Nelliel charged simultaneously from opposite angles. Their movements carved sonic distortions through the sky.
They clashed in midair
more than a dozen exchanges in seconds
until Renya drove both downward with a concussive lightning wave.
They fell like meteors.
Yet before impact
Ulquiorra and Nelliel both hurled their weapons.
Two spears.
Two trajectories.
Renya dodged both
but the spears collided midair.
The resulting explosion rivaled high-tier Kidō bombardment.
Renya's lightning spheres formed a defensive barrier
Even so, he was driven backward.
The instant he emerged from the blast
A massive tail swept toward him.
Tsukishima's serpent form.
Renya vanished
but his body abruptly stalled mid-motion.
His muscles locked.
Purple vapor coiled around him.
Tsukishima's voice echoed:
"The toxin corrodes muscle fibers and disrupts neural spiritual transmission. You can purge it with Reiatsu"
"But your current output has already pushed your body to structural saturation."
Renya's Thunder Sovereign state demanded extreme cellular strain. The venom compounded the overload.
Purple blotches spread across his skin.
At that moment
Ginjo struck again.
He trampled the air, generating compressive shockwaves that distorted Renya's internal equilibrium.
Blood escaped Renya's lips.
Lightning within his body destabilized.
The arcs began leaking outward uncontrollably.
Shockwave.
Toxin.
Thunder overload.
His skin began tearing apart, exposing raw lightning beneath.
Ginjo halted.
"Release your Bankai. The poison can be expelled."
Renya smiled faintly.
"Now… I've finally reached the threshold."
The Hōgyoku within him pulsed.
His wounds began regenerating instantly.
Purple toxin vanished.
Lightning stabilized.
The first adaptive response manifested
Accelerated regeneration.
But it did not stop.
His skin split again
this time not from failure
but from forced evolution.
A towering thunderous silhouette began expanding outward from his body, lightning spiraling upward into the sky of Hueco Mundo.
His flesh tore
reformed
tore again
each cycle refining structure rather than destroying it.
Reiatsu density climbed beyond previous parameters.
The battle had ceased being combat.
It had become metamorphosis.
And Renya's body was changing once more.
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