OP Sister Chapter 409: Rematch! Anna Against Beelzebub!

Listen While Reading: All out brawl & Qintessential
-----

“{Heavenly Seal}!”

Using the particles of light, ki, and other energies that the explosion created, Anna turned them into giant chain-shaped runes that wrapped around the portal.

“Greeeaaagh!”

“Gryyeeeh!”

“Shaaaahh!”

The insectoid demons started trying to get into the world again, grabbing the chains and shaking them constantly, attempting to enter but burning themselves in the process, their hands turning to ash.

“There! Done! Things are too frantic to worry about another problem!” Anna said. “I’ve temporarily sealed it. It should hold for at least half an hour; that should be enough time for us to deal with this problem.”

“Please explain to us what’s going on though!” Her adoptive father grumbled.

“Hah, long story short, I’ve got some enemies back home—let’s say three… otherworldly demons with power that surpasses all the constellations we fought combined,” Anna said with a straight face.

“EH?!”

Her whole adoptive family was flabbergasted by that quick description; Anna had hardly told them about her many enemies at all, making things a bit more complicated now.

“It seems the Void Ruler behind this, the Universal Computer, created some sort of pact with them and brought them over. But I believe this might be their last resort… We have to quickly take care of this, the remaining machines, and then move on to somehow fend that thing off,” Anna said.

“How can we stop the demon invasion?” asked Song.

“We’ll stop the portals from bringing demons and also destroy their catalysts,” Anna said, looking at Beelzebub. “That nasty fly is one of them. But I detect two more large portals, meaning there are two other catalysts. We’ll have to split up and destroy them. Song, choose who to accompany.”

“I’ll go with Mom then!” Song said. “She didn’t absorb the cosmic power unlike Dad, right? So she’s still weaker.”

“Hah… Well, I was slightly arrogant by rejecting such strength, but thanks,” his mother smiled. “I appreciate the help, my son.”

“Fine then! I’ll go alone! Not like I need my son’s help or something!” the Heavenly Demon complained.

“You girls, accompany them!” Anna’s Myriad Self Aura divided into various Egos; six of them—three went with her mother and Song, and another three with her father.

As this happened, she quickly glanced at Beelzebub.

“Young Lady, I am ready for battle at any time!”

She heard Fang Shuan’s words resonating within her mind; she was currently inside his mechanical body, fusing her powers with him to turn him into an impressive mech.

Sepa and Bastet had also merged with his mechanical form, making him even mightier, using the powers of the Mighty Morphin Core to unleash a power similar to the King of Steel.

“Anna, let’s finish that bastard off once and for all!”

Sepa seemed ready for anything.

“Indeed, it’s time for him to meet his ultimate end.”

Bastet showed her bloodthirst too, something quite rare.

“If I could kill two Constellations by now, then killing this damn fly shouldn’t take me too long… Let’s do this.”

CRAAASH!

RUMBLE!

The Demon King and Beelzebub clashed against one another, their blows intercepting each other. The Demon King, without Song’s soul, had grown weaker, and although Anna naming him restored some of his power, at least half of it was gone.

However, it was still overwhelming, and the worst part for Beelzebub was that the more they fought, the more the Demon King learned. Like a machine, it had an incredible learning ability, rapidly memorizing all its movements, evading them, and predicting them.

At the same time, Nemesis was rapidly evolving; its own abilities, both old and new, were being rediscovered as it fought, learning how to use them properly.

Beelzebub ended up becoming a great training partner for Anna’s new friend, and she was rather grateful for that.

“DAMMIT, THIS THING!”

Beelzebub swung all six of his gigantic, armored claws; his body was now over a hundred meters tall, but the Demon King happened to be a few dozen meters taller, and both of its giant arms were enormously bulky and harder than the strongest metal Beelzebub knew.

His giant claws couldn’t even pierce Nemesis’s armor! Instead, they cracked and seemed about to shatter into tiny pieces. His demonic power overflowed through his body, however, allowing him to recover and regenerate wounds quickly.

“You’re one annoying bastard, aren’t you?!”

Beelzebub gritted his sharp jaws as he swung his claws upward and downward—not to attack, but while evading several laser beams coming from the cannons generated by Nemesis.

As the giant fly rapidly dodged countless explosions, he continued moving his claws; hundreds of demonic runes were conjured in mere seconds, amassing into a large demonic pentagram.

FLASH!

Then, using all his strength, he flew as quickly as he could, becoming a black-and-red blur that the Demon King couldn’t follow due to its heavy body, allowing Beelzebub to sneak behind him.

“{Black Cross of Pestilence}!”

FLAAASH!

A giant black cross manifested from his pentagram, hitting the Demon King’s body and piercing through it! Although it seemed to deal with no physical damage, the Demon King’s eyes widened as he felt tremendous pain.

An electrifying pain spread through its body; the deadly black cross shocked its entire form with a curse, and green fog began to rapidly manifest, wrapping around it and weakening it quickly.

The Demon King swung his claws at Beelzebub, but he was incredibly slow now; the fly easily evaded his attack and smiled viciously.

“Heh! You’re slow now, aren’t you? You might be stronger than me physically, but when it comes to Demonic Magic, nobody can surpass me!”

“RAAAAAHH!”

The Demon King roared furiously, attacking Beelzebub as he manifested two massive mechanical arms out of thin air. Unhindered by the Black Cross of Pestilence, they smashed Beelzebub from left and right!

CLAAAASH!

“G-GEEGH?!”

Beelzebub let out a pathetic groan as he was shocked the Demon King could still keep going. His body had become incredibly tough and powerful, and yet the overwhelming abilities of a Demon King seemed a step ahead, despite being technically the empty husk of its former self.

“T-This damn bastard is still this strong?!” Beelzebub thought, gritting his mandibles tightly as he infused power into all his limbs, pushing out while his muscles broke and tore apart, only to regenerate quickly after. “I cannot let him get me! I might be weaker, but I have a gigantic quantity of Demonic Energy thanks to my sponsors! I won’t lose!”

While four of his arms pushed the two massive mechanical palms away, his two other arms finished conjuring a triple-layered demonic pentagram.

“{Red Sword of Starvation}!”

CLAAASH!

“GRRRH?!”

The Demon King vomited black, miasma-like blood as a giant red sword pierced its chest in an instant, wrapping it in a red cloud that rapidly deprived it of energy and nutrients.

But there was more…

“{Green Axe of Agony}!”

A massive green axe made of strange, slime-like energy swung down, cutting through the Demon King’s left arm and cleaving it off!

SLAAASH!

“GRAAAAAAHHHH!”

The Demon King screamed in agony, its powers destabilizing!

“Heh… Ugh…! And now…!”

Suddenly, a blue scythe manifested above Nemesis, glowing with the aura of pure…

Death!

“Your body will be mine… And once I obtain it… I will become the strongest demon!”

Beelzebub laughed as the scythe descended.

“{Blue Scythe of Death}!”

The scythe spun in midair, gaining strength and force as it rushed towards the Demon King’s head, aiming to behead him and incapacitate him, giving Beelzebub time to take over his body.

“YOUR BODY IS MINE!!!”

Beelzebub thought himself victorious already, his laughter echoing through the skies as his scythe—

“{Heavenly Myriad Blade Arts}: {Golden Dragon Descent}!”

"ROOOAAARRR!"

Beelzebub’s eyes widened as a gigantic golden dragon emerged from below, opening its jaws and devouring the blue scythe, shattering it into pieces.

Crack, crack…!

CRASH!

As this happened, the golden dragon rushed towards him, still trapped between the Demon King’s mechanical fists.

“W-wait a second—AAACK!”

SLASH! SLASH! SLASH! SLASH! SLASH!

The powerful attack, actually a swordsmanship technique, engulfed Beelzebub; as the dragon devoured him, his entire body was covered in thousands of slashing attacks at once before the force and energy from all these strikes detonated into a huge explosion.

BOOOMMM!!!

“W-What the…?!”

Beelzebub fell from the sky, his eyes widening in disbelief at the immense force of the attack; more than half of his gigantic body was now gone.

What remained of him was merely his torso, two left arms, and half his head!

His insectoid eyes glanced at Anna—or rather, at the giant machine she was riding, which she had merged her powers with.

“How did she… become so powerful in this little time?!”

The difference between the Anna Beelzebub who had fought before and what she had become now was like heaven and earth.

-----