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Klein and Amon in Shock!The Sky Falls with Ultimate Magic!
...
In the World of Uncle Nine
"The undead's finished."
Uncle Nine said it with certainty — the tone of a man who'd been hunting zombies for thirty years.
"Really, Master?""He looked insanely powerful though!"
Qiu Sheng and Wen Cai glanced at each other, clearly unsure.
Uncle Nine shot them a side-eye. "You two doubting your master's expertise now?"
"No matter how strong an undead is, it's still a cursed, evil thing. And what do evil spirits fear most? Pure heavenly thunder. That General Bude's lightning Teigu — it's literally their natural enemy! Thunder cleanses all evil!"
He spoke with absolute confidence.
"As expected of Master! You really do know everything!"
Qiu Sheng gave a thumbs-up, flattering him at just the right time.
Uncle Nine nodded, face calm and wise — until—
"Master! Master!"Wen Cai tugged at his sleeve, panicked."Something's wrong! The undead—he's totally fine! Not even scratched!"
"What?"
Uncle Nine stared at the glowing screen — the undead king was standing there, perfectly unharmed.For a long moment, Uncle Nine just froze, his face burning red.It felt like someone had slapped him across the face — over and over.
...
In the World of "One Man"
"Wait, wait, wait— you're telling me the power of heavenly thunder did nothing to him? That's straight-up cheating!"
Zhang Chulan's jaw hung open.
In his mind, even if the undead king wasn't destroyed outright, he should've at least looked a little rough — singed bones or something.But no. The result was nothing like he expected.
"Undead that can resist divine thunder? That shouldn't even be possible," said Zhang Lingyu, the young celestial master of Longhu Mountain, disbelief in his voice.
"There's only one explanation," said Zhang Zhiwei, the old Heavenly Master calmly."His level… is far, far higher than we thought."
"How high are we talking?" Lingyu asked."Even Five Thunder Righteous Law can't touch him?"
Zhiwei just shook his head silently.
...
In the World of A Certain Magical Index
"If it were Onee-sama's Railgun, she'd blast that skeleton to ashes for sure!"Kuroko said confidently, eyes sparkling.
"Yeah! Misaka-senpai's one of the top Level 5s in Academy City!"Saten Ruiko nodded in agreement.
Then—
"Oh, look! He's summoning his undead army!"
Multiple glowing circles appeared around the undead king.Across countless worlds, viewers leaned forward — eyes glued to the sight.
The chanting grew louder. The circles multiplied, expanded, and merged into a massive, glowing formation.
"All for the mission… the most efficient way,"the skeletal figure murmured softly.
Then he raised his arms, voice echoing like thunder:"A sacrifice to the Mother Goddess of the Black Goat!"
A chill wind swept across the battlefield — gray, lifeless, reeking of death.
In the next moment, one of the imperial formations — thirty thousand soldiers strong — fell to the ground, lifeless.
"What happened? Are they asleep?Was that a massive sleep spell?!"Lubbock, the green-haired assassin, gasped.
That was what everyone thought at first — a huge, wide-range sleep spell.
But then—
"Ah—ahhhh!!"Screams erupted."They're dead! They're all dead! The entire army— thirty thousand of them— gone!"
The entire multiverse fell silent.
For a long moment, not a sound.
Then chaos.
"You're kidding me!""Thirty thousand soldiers — gone just like that?!""No way! That's not even possible!""Even jokes have limits— what the hell did that undead do?!""What kind of magic was that?""Killing thirty thousand people in an instant — that's… that's heresy!"
...
The worlds trembled.
In the World of One Piece — Marine HQ
The sound of collective gasps filled the meeting room.
"T-Thirty thousand… dead in one second? What did that skeleton do?"Fleet Admiral Sengoku stammered.
"I don't know," sighed Vice Admiral Tsuru. "We can't see through his power at all. Fortunately, that undead king doesn't exist in our world."
"Yeah," Garp chuckled dryly. "Just like he wasn't supposed to exist in Night Raid's world either."
Silence.
The whole room went dead quiet.
...
In the Fairy Tail World
"That's not magic — that's pure evil!""He's worse than the black wizard himself!""The Undead King — that title says it all!""He's a god of death walking the mortal realm!"
Natsu, Erza, and Gray clenched their fists in anger.
Even though the Undead King was technically helping Night Raid, sweeping away their enemies,none of them could stomach it.
Thirty thousand lives — erased without hesitation.
Across the worlds, few could accept such slaughter.
Except, of course—
...
The Great Tomb of Nazarick.
"UOOOOHH!""Lord Ainz is amazing!!""Mortals tremble before the Supreme Being!""Long live the Sorcerer King!""Glory to Ainz Ooal Gown!""This is only the beginning!""The real show starts now!"
Led by Albedo and Shalltear, the entire Tomb erupted in worship and cheers.
...
Back in the World of Akame ga Kill
The battlefield north of the Imperial Capital was chaos.
"H-He killed thirty thousand people… in one go?"Tatsumi's voice shook.Even though they were enemy soldiers, he couldn't calm the tremor in his heart.
"It's all on me," Najenda said grimly."I was the one who used the external aid card — I summoned the Undead King. Whatever he does… I'll take full responsibility."
Elsewhere on the battlefield
Kurumi smiled faintly."Quite the impressive spell, Lord Ainz."
"Hahaha! Oh, my magic isn't over yet!"The skeletal king laughed, voice echoing across the skies.
Everyone watching felt their hearts tighten.Not over?He killed thirty thousand people — and that was just the start?
What was coming next?
"The real performance begins now," he said, voice calm, almost gleeful."The sacrifices to the Mother of Black Goats… will return as her beloved children."
A shadow appeared — a black sphere, growing rapidly as it fell from the sky.It crashed into the field of corpses.
Dark waves spread outward, swallowing every body whole.When the black tide receded—
Two enormous, writhing masses of flesh stood where the army had fallen.
The offspring of the Black Goat had arrived.
A massive, pulsating hunk of flesh loomed above, its surface crawling with dozens of gaping, blood-red maws that bleated like sheep.
Countless tentacles writhed around it like a swarm of demons dancing, radiating an aura of pure death.
Just looking at it made one's skin crawl, the kind of fear that seeps into your bones and freezes your soul.
"An Elder God! That's an Elder God, I'm sure of it! A being on par with my own faith!"
In the Naruto world, Hidan grabbed Kakuzu's shoulders, eyes blazing with zeal as he howled with laughter.
"Oi oi oi! That's one hell of a monster we've got here!"
In the Gourmet World, Toriko wiped his mouth, eyes gleaming.
"Toriko-san, you're not thinking of eating that thing, are you!?"
Komatsu's voice cracked with panic.
"What? No way! Just looking at it, you can tell it wouldn't taste good!"
Toriko shot back immediately.
"Oh, come on! This is getting more ridiculous by the second! These cross-world reinforcements are way too overpowered!"
In the Dragon Raja world, Lu Mingfei was drenched in cold sweat.
"At this point, I can't even tell which side's supposed to be the villain anymore!"
From Konosuba, Kazuma screamed, clutching his head.
"Wait, wait! That undead summoned two Elder Gods but hasn't ordered them to attack. Maybe he's just using them as intimidation—to end the Empire war faster! Kinda extreme, but… damn, it's working."
From Reborn!, the world's strongest baby, Reborn, raised an eyebrow.
"Good thing the boss summoned only Nebula and Escanor. If it had been Ainz himself… I'd probably have died of fright."
In the Demon Slayer world, Mitsuri Kanroji turned pale.
"Forget us— even Muzan would die of sheer terror if he saw that!"
Inosuke snorted.
Meanwhile, in the world of Lord of the Mysteries—
"He even managed to summon spawn of the Black Goat. Just what level is this undead supposed to be?"
Klein's voice trembled with disbelief.
Amon, the man with a monocle, murmured softly,
"The Dark Mother, Shub-Niggurath… so she exists beyond this world too."
In the A Certain Magical Index world—inside Gremlin, the Magic God Council—
"What level has this necromancer reached? Could he already stand alongside us?"
The girl with the eyepatch, the Norse Magic God Othinus, whispered.
"No. Not yet."
The Daoist goddess, clad in white, shook her head.
The Akame ga Kill World – Imperial Capital Battlefield
The birth of the Black Goat spawn crushed the Empire's army's last shred of hope.
Even though Ainz's command had kept the creatures from slaughtering indiscriminately, just their presence alone—those monstrous forms—was enough to shatter morale completely.
Even Great General Budo stood frozen, his mind blank, unable to muster a single thought of resistance.
"Empire! This is your final warning. Surrender now—or the spawn of the Dark Mother will raze your capital to the ground."
Ainz's voice was calm, but the weight behind it was terrifying.
"H-hey, he's kidding, right? He's not actually gonna let those things stomp through the city, right? That'd kill everyone!"
Lubbock cried out.
"No," Akame said firmly, shaking her head."If he really meant to do it, he wouldn't be warning them first."
"She's right," said Bulat, his pompadour glinting in the light. "He's bluffing to force surrender. Smart move."
Najenda exhaled slowly.
"Looks like things are better than we feared. Ainz doesn't actually want to massacre that army."
Inside the Imperial Palace
"Surrender? To that bag of bones? Don't make me laugh! I'll crush him under the might of the Supreme Teigu!"
Minister Honest's eyes were bloodshot as he bellowed, panting heavily.
"Your Majesty, the thousand-year Empire is under siege by heretical abominations! Now is the time to wield the Supreme Teigu and purge these monsters! You must not hesitate!"
"I… understand, Minister."
The young Emperor took a deep breath.
BOOM!
Rumble…
The Supreme Teigu shifted into flight mode, roaring to life.
Under the Emperor's control, the Colossal Mecha God of the Empire blasted into the sky like a rocket—then plummeted like a meteor straight toward one of the Black Goat spawn.
The impact shook the heavens.
Dark, foul blood splattered everywhere. Even the creature known for its monstrous defense was torn apart, half its body shredded.
"So it's finally here—the Supreme Teigu."
Ainz's sockets flared with light. This was the prize he had come for.
"Go, my spawn. Tear it apart!"
At his command, the two Black Goat spawn charged.
They weren't magic casters or spell users—their strength lay purely in raw size, brutal power, and near-impenetrable hide.
The battlefield quaked as they slammed into the towering machine, driving it backward step by step.
Fans of giant-monster fights across the multiverse were losing their minds watching the spectacle.
The only downside? The battle looked like a brawl between toddlers—no finesse, no tactics, just pure chaos.
"Damn it! I am the heir of a thousand-year Empire, wielding the might of my ancestors! How could I lose to mere beasts!?"
The young Emperor's roar echoed through the capital.
Every weapon system the mecha had—ones never seen even in his first battle with Tatsumi—unleashed at once.
And finally—
After a brutal, desperate struggle, the Supreme Teigu managed to destroy both Black Goat spawn, though half of its own body lay in ruins.
"Not bad," Ainz said approvingly. "For the Supreme Teigu, that's quite the achievement."
"G-good! Then if you fear defeat, leave while you can!"
The Emperor panted, his voice trembling.
"Ainz Ooal Gown… knows no defeat."
Ainz's voice was calm, absolute.
"Face your fate, Supreme Teigu. For before you stands the combined might of all forty-one of Ainz Ooal Gown!"
He raised his right hand.
Complex magic circles flared around him, spreading upward to the sky, layer upon layer of overwhelming power.
Out of respect for the machine that had managed to fell his summons—
Ainz chose to unleash another super-tier spell.
"Its name… is Skyfall."
BOOM!
RUMBLE!
An earth-shattering explosion tore through the battlefield.
When the dust finally cleared, the Supreme Teigu was gone—completely vaporized.
Not even its shadow remained.
Even that mighty construct had been obliterated by the power of a single spell.
A collective gasp echoed across the multiverse.
Hhhhhh—!
The sound of countless beings drawing breath filled the cosmos.
"Incredible!""What kind of spell was that!?""It vaporized the Supreme Teigu in an instant!""This power… it's absurd!""An undead can use that kind of magic!?""A necromancer shouldn't be this broken!"
Every world, every watcher could only stare in stunned disbelief.
"Didn't think that undead was that strong… Looks like I'm not ready to face him yet."
In the That Time I Got Reincarnated as a Slime world, Rimuru scratched his head awkwardly.
"Don't sell yourself short, Rimuru! You're an awakened Demon Lord—plenty strong already!"
Veldora gave him a big thumbs-up.
And then—
"Enough!!!"
A commanding shout thundered through the light screen.
A blue dragon streaked through the sky above the capital, and a tall, graceful figure descended, landing before Ainz.
"I'll be your opponent from here on."
The Empire's strongest sadistic general—
Esdeath—had returned.
"..."
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