The Heroine is My Stepsister, and I'm her Final Boss-Chapter 420 - 418: THE FIRE THAT ANSWERED THUNDER

Thor’s Lightning presence in sight, Gabriel knelt.

Not because he was defeated.

Not because his wings were torn or his ribs cracked or his lungs burned like he’d swallowed smoke.

He knelt because the ashes beneath him demanded a witness.

Gabriel pressed his palm to the soil, feeling the faint residual tremor of mortal fear still trapped in the earth. Ash rose around his hand in soft spirals, like souls unsure whether to rise or cling to their home a moment longer.

He whispered.

Not to Heaven.

Not to God.

To Atlas.

The prophet-king whose shadow stretched across angels and mortals alike. The one whose voice carried weight in celestial halls that had once mocked the idea of any prophet touching destiny. The only man Gabriel had ever believed in without needing permission from Heaven to do so.

"Atlas," Gabriel breathed, bowing his head as dust curled around his shoulders, "lend me your sight. Lend me your flame. Lend me the strength to stare into this false god’s face... and laugh."

A faint pulse stirred in his chest. Not power. Not protection.

Permission.

It felt like a hand on his shoulder. Not lifting him. Not steadying him.

Just... letting him choose.

A memory flickered—Atlas standing on a cliff of broken futures, eyes glowing with something far older than prophecy, saying softly: "They fear you because you never needed wings to stand tall."

That memory warmed Gabriel’s ribs more than the fire still seeping from the ruins.

He rose slowly. Ash clung to his knees like pleading fingers. For a breath, Gabriel allowed the guilt to sit in him, sharp and heavy. I wasn’t here.

Another breath.

I should’ve been faster.

He let the guilt burn itself out.

The ground trembled.

Thor approached.

Each step shook loose stones from the ruins. The massive god’s ten-foot frame moved with the weight of stormclouds—fat with lightning, swollen with thunder, mortal flesh distorting divine structure into something brutal and grotesquely powerful.

Every crack in his thick skin glowed with lightning veins that pulsed irregularly, as if struggling to remember the rhythm they once held.

Gabriel turned as the shadow fell over him.

Thor sneered down, the gesture pulling sparks from his beard.

"Praying?" Thor boomed, voice echoing through the charred skeletons of towers. "To your little prophet? To the child who thinks he can chain the heavens?"

Gabriel’s eyes were calm.

Too calm.

The kind of calm someone discovers only after losing too much to fear losing anything else.

"I wasn’t praying for him," Gabriel said, dust sliding from his wings. A faint flicker of heat bloomed beneath his breastbone. "I was praying at you."

Thor’s expression froze like thunder halted mid-strike.

A breeze passed through the ruins—soft, tentative, as if the world itself was trying to flee before the storm dropped.

Gabriel stepped forward. The ash under his sandals cracked like brittle bone.

"You’re weaker than before," he said, voice almost bored. "Do you feel it? The drag on your limbs? The tremor in your heart? You’re nothing like the storm that once fought Heaven."

Thor’s jaw tightened until lightning leaked between his teeth.

Gabriel’s gaze sharpened.

"Back then," he murmured, "you tore constellations apart. You broke time in half. You made the skies bleed."

He lifted his chin.

"Now..." A pause, deliberate and surgical. "...you can’t even kill me."

Silence. 𝒻𝑟ℯℯ𝑤𝑒𝑏𝑛𝘰𝓋𝑒𝓁.𝒸𝑜𝘮

Even the smoke rising from shattered temples hesitated.

Thor’s face twisted—rage clawing through the cracks of his temporary mortality. Then—

He roared.

Lightning detonated outward in a sphere of white-blue destruction. The shockwave peeled dust from the ground and sucked the air from Gabriel’s lungs. The sky above darkened as clouds stampede-gathered like frightened herds.

Thor lifted Mjolnir high, calling every storm across the continent.

Clouds churned. Thunder rolled like the cracking of ancient bones. A million bolts folded inward, collapsing into a single blinding point at the hammer’s head.

The world dimmed.

Gabriel’s pupils tightened to pinpoints.

Thor bellowed:

"LET THE SKY END!"

And he brought the hammer down.

The lightning was not a beam.

It was an ocean—a continent-spanning flood of raw god-storm. Air turned to glass. Light devoured shadows. Every hair on Gabriel’s arms lifted, heat rushing up his spine like fire licking bone.

He didn’t move.

He whispered one word.

"Atlas."

A heartbeat of silence.

Then—

another light split the sky.

Not blue.

Not white.

Gold. Fire. Judgment.

The heavens cracked open like a furnace door unlatched.

A flaming sword the size of a palace cleaved down between Gabriel and the incoming lightning ocean. The impact divided Thor’s attack into two screaming rivers of electricity, each ripping through the landscape behind them.

The mountain range behind Gabriel—

vaporized.

Stone turned to molten dust. Dust turned to nothing.

Heat washed back over Gabriel’s wings like the breath of a living sun.

When the flames cleared, he stood there:

Michael.

Eight wings unfurled—each pair larger, heavier with fire, burning with a violence that made the surviving air quiver. Holy fire dripped from him, each droplet igniting ash into sparks.

He didn’t look at Gabriel.

He didn’t look at the ruins.

He looked only at Thor.

Then raised his sword.

Heaven’s greatest general had arrived.

Thor staggered back half a step, the first sign of fear cracking through his thunderous bravado. Lightning snaked across his shoulders, twitching in disarray.

"You," Thor growled, voice split with disbelief. "You dare show your wings here?"

Michael stepped once—flame rippling out like the beginning of a supernova.

"You threatened our prophet."

Thor roared, lifting Mjolnir.

"THEN LET US FINISH WHAT WE STARTED IN HEAVEN!"

Their weapons collided—

Flame on thunder.

Wrath on storm.

The shockwave cracked the earth for miles.

Ruins collapsed. Clouds tore like paper. The air rippled with heat and static, unable to commit to either element.

Michael moved like a blade given form. Thor moved like a storm wearing a body too tight.

They struck again—

Thor’s hammer dragged lightning trails that scorched deep trenches into the ground.

Michael’s fire swept out in arcs that melted stone into rivers of shimmering metal.

Each clash forced the sky to flicker between fire and lightning, like two gods pulling the world in opposite directions.

Then—

A gentle tear in reality.

Cool. Silent. Sharp.

Uriel stepped out, silver armor catching the ambient firelight, casting it back in controlled gleams. Her dark wings unfurled with quiet precision.

Her presence was a blade sheathed in discipline.

She turned—and found Ouserous, the eight-foot child of lightning, watching her.

Sparks fidgeted across his cheeks like impatient fireflies.

He grinned.

"You look fun."

Uriel drew her sword. The simple metallic whisper felt like judgment incarnate.

"You struck an angel, an angel of the acclaim," she said. Her voice calm enough to chill air. "You will answer for it..you will answer dearly...."

Ouserous clapped like a delighted child.

"Good! I was getting boared seeing dad’s fun!"

He vanished—lightning with a pulse.

Uriel pivoted, armor chiming softly.

Her blade intersected his lunge mid-air, sending sparks in all directions. Ouserous spun out, body smashing through a half-collapsed tower.

He laughed even as debris rained down.

Uriel walked toward him, steady and silent.

"You enjoy pain, just like your father.." she murmured. "You shouldn’t..."

Ouserous floated up from rubble, shoulder bleeding flickers of electricity.

"I don’t enjoy pain," he said. "I enjoy movement."

Then he flickered—

To her left.

To her right.

Behind.

Above.

Beside.

Each appearance marked by small lightning bursts that cracked foundations and broke stone.

Uriel answered with precise angles—cuts that sliced through air with surgical cruelty. Each swing forced him back, carving arcs of silver through the battlefield.

Their fight became a storm inside a storm—

—silver flashes

—lightning bursts

—shockwaves blasting broken architecture

—Ouserous’s childlike laughter

—Uriel’s unshakeable calm

Ouserous cracked a bone in her gauntlet with a point-blank strike.

Uriel punctured his shoulder in a perfect counter.

He grinned even as the wound hissed.

"You’re strong," he chirped.

Uriel’s eyes narrowed, wings shifting minutely.

"No. You’re uncontrolled."

Lightning surged through Ouserous as he charged, wild and unstable.

Uriel braced—

Their collision fractured the ruins into two drifting halves.

Meanwhile—

Michael and Thor were tearing reality apart.

Thor swung in furious arcs, each one forming a gravitational vortex of lightning. Michael deflected with firestorms so hot they warped the air like melting glass.

Thunder boomed. Flames roared. The world reeled.

Michael ducked under a hammer swing that would’ve shattered a mountain.

Thor snarled:

"You hide behind his crutches! Fire borrowed from a throne of a mortal king!"

Michael’s eyes burned brighter.

"All my strength... is earned."

He struck Thor across the jaw—teeth flying like shooting stars.

Thor shook, rage surging.

"Mortality weakens me— but strengthens my RAGE!"

Lightning geysered from his wounds.

Michael lifted his sword.

"Good."

He leaned forward, fire flowing behind him like a cloak.

"I prefer you angry...Easy to manage."

Their next clash collapsed the last intact cathedral spire.

Through it all—

Gabriel stood at the center.

Watching.

Breathing.

Feeling the god’s weakness more clearly than thunder or flame could reveal.

Thor’s lightning stuttered. His hammer sputtered. His mortal flesh struggled to keep up with divine fury.

Gabriel whispered:

"So fragile."

Thor’s head snapped toward him.

"What did you say?"

Gabriel stepped closer, wings dim but steady.

"So weak," Gabriel said. "So fragile. So useless, Thor. Mortality is killing you."

Thor’s aura convulsed—lightning flaring wildly like panicked animals.

"You dare!?"

Gabriel pointed his spear at him.

"Atlas will finish what you started."

Thor lunged—

Michael intercepted—

Uriel clashed with Ouserous—

Lightning, fire, silver, all colliding in chaotic beauty—

And above it all, Gabriel whispered:

"Let the world witness what becomes of gods who forget humility, who forgets the Acclaim."