OP Sister Chapter 452: Mother And Son Against The King Of All Evil

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Lucifer was under attack from every angle. The Heavenly Empress unleashed powerful palm strikes followed by masterful swordsmanship techniques, relentlessly pushing him back with her newly enhanced Heavenly Imperial Armament Mechanical Armor.

Meanwhile, Song harnessed the power of the Heroic Heart of Will, delivering a barrage of blazing punches infused with his massive Battle Aura. Following the techniques his father had taught him, he drove the giant seven-headed dragon back and forth! 

RUMBLE! 

“TCH! RAAAAHHH!” 

Lucifer grew desperate, unleashing seven gigantic breath attacks against both of them! The breath attacks pursued them as they tried to escape, relentlessly targeting their every move. 

“Song! Come to me!” 

The Heavenly Empress called to her son, and the boy swiftly flew to her side. In that moment, she waved her hand, manifesting a colossal golden shield. She stood firm as all seven breath attacks struck her. 

BOOOMMM!!! 

Crack, crack…! 

The shield began to fracture, but it remarkably held against all seven attacks at once, leaving Lucifer stunned, his seven heads brimming with frustration. 

“Y-YOU THINK THAT SHIELD WILL BE ENOUGH?!” 

An eighth head suddenly emerged from his torso, its jaws gaping wide to reveal thousands of sharp fangs and a writhing tongue. 

“GRAAAAHHHHH!” 

With a monstrous roar, a titanic breath attack of pure demonic energy surged toward the Heavenly Empress and her son. 

“Reversal!” 

She swiftly unleashed the damage absorbed by the disintegrating shield, countering with an equally massive beam of light that collided with Lucifer’s desperate attack. 

RUMBLE!

As the skies quaked from the sheer power of the clashing demonic and ki beams, the Heavenly Empress and Song seized the moment to escape, darting toward Lucifer from below.

Simultaneously, a giant mechanical fist slammed into Lucifer’s backside, hurling him forward with tremendous force. 

BAAAM! 

“Ugh?!” 

He glared back in fury, locking eyes with the colossal Fifth Demon King, Nemesis, who faced him head-on without a trace of fear, unlike the others. 

“YOU DAMN PIECE OF SHIT!” 

Lucifer lunged downward, jaws wide, biting into the mechanical Demon King’s body. 

“GRUUUAAAAHHHHH!” 

The Demon King roared furiously with a metallic voice, opening its massive jaws and unleashing an explosive beam of photon energy directly into Lucifer’s face. 

BOOOM! 

“AARRGH!” 

Lucifer screamed in agony as a gaping hole tore through his eighth head, most of its upper jaw obliterated, blood gushing everywhere. 

“Y-YOU DAMN…!” 

He swiftly extended his giant draconic arms, conjuring thousands of enormous demonic pentagrams—magic circles unique to demons, distinct from conventional ones. 

“{Endless Infernal Meteor Rain}!” 

Roaring with boundless fury, the King of All Evil bombarded Nemesis with countless explosive meteors, relentlessly striking the demon’s body. 

BOOM! BOOM! BOOM! BOOM! BOOM! 

“GRUUUAAAGGGHHH!” 

Nemesis tried to break through with sheer physical strength but faltered as Lucifer laughed maniacally, continuing his onslaught of deadly meteors.

Each meteor exploded against the Demon King’s face, melting its metallic body and driving it downward with unrelenting force. 

“The Demon King was tamed by Anna, and he’s putting his life on the line for our sake now…!” 

The Heavenly Empress glanced at the Demon King, roaring and fighting even as half its body melted. Despite nearing death, it pressed forward like a relentless beast.

Though her son stood by her side, that monster was still forged from his body. Even with his soul now secured, that being remained a part of Song. 

“Mother, now!” 

Song knew exactly what his mother was thinking and why she was hesitating to approach and coordinate with Nemesis.

But there was no time for hesitation! 

“I know what you must be thinking, but he’s our ally now. We have to fight together, or we’ll never avenge my father’s death!” 

“That’s right…! I’m sorry, Song! Let’s do this.” 

The Heavenly Empress and her son surged toward Lucifer, resembling a golden and a red star, striking his body from both sides. 

“{Twin Star of Hope and Will}!” 

Their Auras converged, unleashing a combined Technique reminiscent of the one the Heavenly Empress had once performed with the Heavenly Demon! 

CRAAASH! 

Lucifer vomited torrents of blood, feeling cracks splinter through his soul! He glanced at his body, where a massive hole had pierced his heart and lungs. 

“D-Dammit…! FUCKING… DAMMIT!!!” 

His wounds resisted regeneration, forcing him to mutate further, sprouting grotesque tumors of flesh and bone to compensate for the lost tissue. His original vessel twisted and warped into something unrecognizable. 

“GRAAAAHHH! I WON’T DIE UNTIL I MAKE SURE I KILL YOU ALL!!!” 

Lucifer’s fury consumed him, his monstrous draconic form sprouting long, scaled tentacles resembling dragon tails and countless additional heads, transforming him into an eldritch abomination. 

“DIE! DIE! DIE! DIE! DIEEEE!” 

His heads endlessly roared the same words, driven mad as his sense of superiority was shattered by these “lowly mortals” who defied all logic.

Space and time warped around his body, leaving the Heavenly Empress and her son staring in disbelief at the aberration before them.

As if the entity controlling the machines wasn’t enough, it had summoned such an abomination to this world! 

“Let’s do this, mother!” 

“My son… You’ve truly grown so much…” 

The Heavenly Empress gazed at her son, radiating confidence. For a moment, she glimpsed the shadow of his father behind him. With every battle, he grew to resemble him—not as he was in the past, but as the incredible hero who sacrificed himself for a world he once despised.

Through hope and his family, he had learned to love it, becoming someone so extraordinary that, in his final moments, he surpassed her. 

“This is a monster beyond all our expectations. We can’t hold back, alright?” 

FLUOSH! 

“Yes, I understand, Mother!” 

Their Auras merged, golden and red hues intertwining, erupting in flames that formed a massive phoenix-like battle aura behind them. 

“{Heavenly Phoenix of Hope and Will}!!!” 

The two roared, charging at Lucifer with a colossal phoenix at their backs, an explosion of flames engulfing half of his aberrant body. 

BOOOMMM!!! 

Lucifer screamed in agony, unable to regenerate easily as these flames burned him, squirming while space distorted around him. He was attempting to open more Demon Gates to summon reinforcements. 

“STOP!” 

As Song and his mother shouted furiously, the giant phoenix cried out, swinging its sharp talons and tearing apart several of the draconic king’s heads, disrupting his focus. 

“B-BASTARDS…!” 

Lucifer gritted his myriad sharp teeth, his body continuing to mutate. Massive, muscular arms and fists sprouted across his fleshy form, unleashing a barrage of punches and explosions of demonic flames. 

BAAM! BAAM! BAAM!

The phoenix was swiftly overwhelmed, reduced to nothing, and exploded into pure energy, blinding Lucifer and pushing him back. 

BOOOM! 

“MY DEMONS…! MY DEMON ARMY! COME TO MEEEE!” 

In a desperate act of frustration, Lucifer pierced his own flesh and soul with his hands, opening a massive, blazing demon portal within his aberrant body. 

FLUOSH! 

“W-What…?!” 

“That bastard could do something like that?!” 

Countless demonic hands and monstrous demonic beasts poured out of the hole in Lucifer’s body, overflowing with demonic energy and constantly warping the space around them. 

“ROOAAARR!”

“GRYYAAAH!”

“SHAAAAGH!” 

Their incomprehensible roars were enough to convey their nature. These weren’t ordinary Demons but something far worse.

Beasts forged in the brutal environment of the 999 Hells—Demonic Beasts! 

“KILL EVERYTHING! DEVOUR EVERYTHING! THIS WORLD IS OURS TO PLUNDER AND BURN!” 

“I WON’T LET YOU!”

“THIS WORLD IS NOT YOURS!” 

Mother and son roared back, their auras swelling to tremendous size, enveloping their surroundings and distorting reality itself. 

“{Double Domain: Heavenly Cage}!” 

FLAAASH! 

Out of nowhere, they conjured a powerful Domain, trapping Lucifer and the Demonic Beasts inside, buying them time as they began rushing through the beasts, cutting them down one by one. 

“Just when will this end?! This damned monster…! I cannot let my husband’s death be in vain! There must be a way, there must be a way!” 

The Heavenly Empress swung her katanas, slicing through countless Demonic Beasts. Their bodies exploded upon death, constantly harming her. 

BOOM! BOOM! BOOM! BOOM! 

“Uggh…! Dammit! This is ridiculous!” 

She glanced at Song, who was being overwhelmed by dozens of Demonic Beasts at once. Her eyes widened as she rushed to save her son. 

“SONG!” 

However, more Demonic Beasts emerged, resembling aberrant wolves, tigers, lions, rhinoceroses, or chimeras of various beasts and monsters. Typically adorned with red, black, or orange fur, they were covered in horns, spikes, extra eyes, limbs, or wings.

The smallest of these demonic beasts stood over fifteen meters tall, while the largest easily reached fifty meters! The Heavenly Empress had no trouble slaying them, but their sheer numbers made movement difficult, let alone dodging their blows. 

Things looked dire once more, and yet… 

“GRAAAAHHHH!” 

The mighty Fifth Demon King continued fighting fiercely, giving his all. 

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