The Heroine is My Stepsister, and I'm her Final Boss-Chapter 449 - 446: Heaven Breaks Before Will

The sky cracked wider.

Not shattered—strained—as if Heaven itself were a ceiling bowing under too much weight.

Atlas and Ares tore through the remains of the arena like twin comets, shockwaves chasing them in rolling thunderclaps. What had once been Lower Heaven’s grand coliseum was now nothing but a collapsing scar, slabs of divine stone spiraling into the void as gravity failed again and again under the pressure of their clash.

They collided midair.

Ares’ fist slammed into Atlas’s ribs.

This time—

Atlas felt it.

His body folded slightly around the blow, LAW screaming as divine force punched deeper than before. The impact sent him skidding backward across the sky, boots carving glowing lines through clouds as he arrested his momentum.

Ares didn’t slow.

He was faster now.

Stronger.

Flames burned brighter, denser, layered—no longer just fire, but war given temperature and intent. His eyes burned like twin supernovas, every motion sharper, heavier, more certain.

Atlas rolled his shoulders as he steadied himself, chest rising and falling.

"...That’s new," he muttered.

Ares grinned, wide and feral. "You feel it, don’t you?" he roared, voice echoing across Heaven like a battle horn. "This place sings to me. Every drop of blood spilled here feeds me."

He lunged.

Atlas met him head-on.

Fist to fist again.

The collision detonated outward, but this time Atlas was driven back a full dozen meters before he could stop himself. His arms trembled—not from pain alone, but from strain.

This was different.

Thor had been overwhelming from the start—lightning strength, raw impact, each strike a mountain dropped from the sky. Brutal. Direct. Final.

Ares was—

Growing.

Each exchange fed him.

Each clash sharpened him.

His punches had started manageable. Now, the force behind them was climbing—step by step—toward Thor’s crushing weight.

Atlas snarled under his breath.

"Fine," he said quietly.

He reached inward.

Deep.

Past LAW.

Past rage.

Past even defiance.

Roots answered.

Yggdrasil essence surged through him—ancient, vast, impossibly old. Golden-green light bled through the cracks in his skin, veins glowing like living branches. The air around him thickened, heavy with life and inevitability.

Ares’ grin faltered for half a second.

Atlas moved.

His punch landed square in Ares’ chest.

The impact wasn’t just force—it was multiplicity. The blow struck once, then echoed, layered over itself as regenerative power rebounded through Atlas’s own body, healing torn muscle and reinforcing bone even as the strike connected.

Ares staggered.

Atlas followed with another.

And another.

Each punch doubled—impact outward, restoration inward. His body knit itself together faster than it was damaged, letting him pour more and more strength into every strike.

The sky thundered.

Ares skidded backward through clouds, boots carving molten trails before he caught himself, chest smoking.

Then—

He laughed.

"Oh, I like this," Ares growled. "You finally decided to fight."

He surged forward again.

This time, Atlas didn’t gain ground.

His punches landed—clean, devastating—but Ares absorbed them, divine fire roaring brighter with every hit. The war god’s body was becoming a furnace, Heaven itself pouring fuel into him endlessly.

Atlas struck again.

No effect.

Again.

Nothing.

"What—?" Atlas hissed, eyes narrowing.

Below them, on a fractured platform barely holding together, Iris screamed.

"Atlas! Stop!" her voice rang out, sharp with panic and realization. "You’re still in Heaven! This place—this realm—it’s feeding him! The divinity here is infinite for gods like him!"

Her words cut through the chaos.

Ares heard them too.

His head snapped toward her.

And his smile vanished.

"You should not have spoken, girl."

He vanished.

Not flew.

Vanished.

The space where he had been collapsed inward as Ares reappeared before Iris in a blaze of crimson fire, fist already cocked back—divine force screaming toward her fragile, mortal frame.

"NO—!"

Atlas moved.

He crossed the distance in an instant, slamming between Iris and the blow, arms raised.

The punch landed.

Atlas felt something give.

Not just flesh.

LAW fractured.

He was driven straight down, smashing through multiple floating platforms before crashing into the lower strata of Heaven with a deafening explosion. Divine stone vaporized. White-gold dust billowed outward like a mushroom cloud.

Iris screamed his name.

Ares hovered above the crater, flames roaring, eyes blazing with murderous triumph.

"You see?" he shouted. "This is what happens when mortals cling to gods."

The dust shifted.

Something stood up.

Atlas rose from the crater slowly, blood pouring freely now, golden light flickering unevenly across his body. His breathing was heavy, ragged—but his eyes—

They burned hotter than before.

"Wrong," he said hoarsely.

The air coiled.

A different presence stirred.

Cold.

Vast.

Hungry.

Jörmungandr essence unfurled from Atlas’s core like a waking serpent, emerald-black energy spiraling around his arms and spine. The pressure changed—not crushing, but inescapable, like the tightening of a world-sized coil.

Ares’ expression shifted again.

"What is that?" he demanded. 𝘧𝓇ℯ𝑒𝓌𝑒𝑏𝓃𝘰𝘷𝘦𝘭.𝒸ℴ𝓂

Atlas vanished.

He reappeared above Ares, driving both fists down.

The impact sent the war god hurtling downward like a meteor, smashing through Heaven’s lower layers until both of them burst out beyond the city’s edge—past marble spires and collapsing sanctums—

And into the Land of White Sand.

An endless expanse.

No cities.

No spectators.

Just pale dunes stretching to the horizon beneath a fractured sky.

They hit hard.

The impact sent shockwaves racing across the sand, dunes flattening for miles as a thunderous boom echoed endlessly.

Ares rose first, laughing even as sand and blood dripped from his armor.

"Out here?" he taunted. "Good. No rules left."

They clashed again.

The echoes of their blows rolled across the empty land like distant storms, each strike sending pillars of sand spiraling into the sky. Atlas fought with everything now—LAW warping reality, Yggdrasil reinforcing him, Jörmungandr constricting space itself around his movements.

Still—

Ares kept growing.

Each punch carried more weight.

More certainty.

"You’re slowing," Ares snarled, slamming Atlas across the dunes. "Face it. You’re weak."

Atlas skidded to a stop, coughing, blood soaking into white sand.

Ares stepped closer.

"Now I see it," he said, eyes narrowing. "That mana... that stink."

He laughed, sharp and cruel.

"You’re not Ra’s get at all."

Atlas pushed himself upright.

"You’re human."

The word hit harder than any punch.

"Mortal mana," Ares continued, voice dripping with contempt. "Boiling inside you, desperate to matter. That’s why Heaven resists you."

Atlas straightened fully.

"Yes," he said simply.

Ares sneered. "Then you were never meant to stand here."

A shadow slid across the sand.

Veil emerged beside Atlas like spilled ink, eyes wide, urgency sharp in his voice. "Atlas! Use this—now!"

The shadow flowed—leapt—wrapping around Atlas’s arm, solidifying into cold weight.

An axe formed in his grip.

Ancient.

Runed.

Heavy with stolen destiny.

Ares’ eyes went wide.

"That—!" he snarled. "Those runes—Asgardian! Where did you steal that weapon, mortal?!"

Atlas didn’t answer.

He moved.

The axe carved a brutal arc through the air, biting deep into Ares’ stomach. Divine blood sprayed as Atlas dragged the blade across him, spun with the momentum, and threw the god across the desert.

Ares tumbled end over end before crashing into the sand miles away, skidding to a stop in a burning furrow.

Atlas dropped to one knee, breathing hard, axe planted in the ground to steady himself.

Veil appeared beside him again. "That bought us seconds," he said quietly. "What’s the plan?"

Atlas looked up.

Toward where Ares was already rising again.

"There is no plan," Atlas said.

Veil stared at him.

"Our plan shattered the moment he saw what I am," Atlas continued, tightening his grip on the axe. "So we do what we always do."

Veil smiled thinly. "Adapt."

Atlas launched himself forward once more.

Behind him, Veil turned, shadows already moving as he whispered a single name into the darkness.

"Bela."

Far away, something answered.

Something cruel.

Something necessary.

And Heaven trembled—because what they were about to do next would not be forgiven.