Super God: The Foundation, Starting with Fabricating SCPs

But he was startled to realize that he had no idea what the cat's expression meant, even if the cat was as intelligent as a human.

A cat was still a cat.

How could he use human thinking to guess how it thought?

The Second Tsuchikage, Mū, was stumped.

After a long pause, he continued, "Whether you were forced to come here to explore like I was doesn't matter right now."

"But I need to tell you this: SCP-049, the Plague Doctor, is far more terrifying than we expected. It's on its way here, so we don't have much time!"

"So I suggest we avoid fighting for now!"

"Let's get the information we want from Kagaya Ubuyashiki first. After that, we can each explore the Demon Slayer World as we see fit. What do you say?"

Mū paused, then added, "There's something I forgot to tell you!"

"Those of us brought back by Impure World Reincarnation aren't as strong as we were alive. But no matter how badly we're hurt..."

"We recover quickly!"

"We're confident we can hold you here."

"Understand?"

With that, Mū fell silent and stared straight at Meow-Meow. The ninja behind him readied themselves for battle.

If he had been talking to a human, Mū was sure his words would have worked.

They would have persuaded anyone.

But the one he was negotiating with wasn't human!

This was his first encounter with monsters, and he couldn't get a read on how they thought. Who knew what went through the heads of these humanoid creatures?

So he had prepared for the worst.

Fortunately, the monster opposite him didn't disappoint. After several tense minutes, Meow-Meow spoke. "Fine!"

"I agree to your plan!"

"But I hate being threatened. Once we get the answers we want from Kagaya Ubuyashiki..."

"I'll kill you!"

Mū finally let out a long breath. As long as they could cooperate, that was enough.

As for Meow-Meow's threat?

Mū didn't take it to heart.

He admitted Meow-Meow was strong. But Meow-Meow wasn't strong enough to kill him—not if he were in his normal state.

After all, Dust Release: Detachment of the Primitive World treated everyone equally!

And in his current Impure World Reincarnation state, Meow-Meow wanted to kill him?

That was a pipe dream!

Meow-Meow could defeat him countless times. He only needed to defeat Meow-Meow once! Having agreed to cooperate, the monsters and ninja joined forces and surged toward Demon Slayer Corps Headquarters!

They had thought the capture would go off without a hitch...

But something unexpected happened.

When they reached Kagaya Ubuyashiki's attic, they found that a swordsman wielding two swords, one black and one white, had already taken him captive!

"I advise you all not to make any sudden moves!"

Black-and-White Xuan Jian looked at Meow-Meow and Mū and said calmly, "I admit you're stronger than I am!"

"But before you kill me..."

"I'm confident I can cut off Kagaya Ubuyashiki's head. Try me if you don't believe it."

After reporting to Qin Shi Huang, Black-and-White Xuan Jian had known he could never beat the forces from other worlds by strength alone.

So he had taken the form of the Sound Hashira, Tengen Uzui, and used his memories to reach Demon Slayer Corps Headquarters first.

He had expected the forces from the other worlds to meet outside headquarters and fight. Then he could seize the chance to abduct Kagaya Ubuyashiki.

He hadn't expected them to join forces instead.

That left him no time to take Kagaya Ubuyashiki away. With no better option, he had taken him hostage.

It would make the others hesitate!

And buy him a slim chance of survival!

And so the three sides stood locked in a standoff.

While the monster army led by Meow-Meow, the ninja army led by Mū, and Black-and-White Xuan Jian faced one another at Demon Slayer Corps Headquarters...

SCP-049, the Plague Doctor, was treating the "pestilence" at an astonishing pace.

With the help of three ninja who possessed the Eternal Mangekyō Sharingan, it was capturing "pestilence carriers" many times faster than before!

In just over ten minutes, they had rounded up nearly every "pestilence carrier" in several nearby towns.

Then, through those nauseating procedures, SCP-049 turned every one of them into SCP-049-2. The newly converted SCP-049-2 joined the hunt...

For more "pestilence carriers."

By the time it took to eat a meal, the number of SCP-049-2 had passed ten thousand.

"Find the ninja with cracks on their faces!"

Leading its vast army toward the area with the highest concentration of "pestilence," SCP-049, the Plague Doctor, ordered Gen Uchiha and the others, now SCP-049-2:

"The concentration of pestilence in them is the highest."

"They need my treatment most urgently!"

"If they aren't treated in time, they'll spread the pestilence to even more people!"

"If the pestilence goes unchecked, all will be lost!"

At SCP-049's command, Gen Uchiha and the others shot into the sky to seek out carriers with an extremely high "pestilence concentration"...

And unmistakable cracks across their cheeks!

Not long after they left, a group of SCP-049-2 carried the corpse of a pig-headed monster before SCP-049.

At the sight, the viewers in the livestream perked up.

After the Uchiha were modified, their One-Tomoe Sharingan evolved into the Eternal Mangekyō Sharingan. Maybe modifying a monster's corpse...

Would give it some remarkable power too.

They also wanted to see how modifying a monster's corpse differed from modifying a human one.

Would it be just as disgusting?

But what SCP-049 said next made the viewers' scalps prickle.

The viewers from the monster world felt fear surge from the depths of their souls. Cold sweat broke out across their bodies, and they couldn't stop trembling!

Onscreen, SCP-049 glanced at the pig-headed monster's corpse and said with utter disdain:

"I'm a doctor! Not a veterinarian!"

"I don't treat beasts!"

"Don't bring me the corpses of these random beasts again!"

Then SCP-049 seemed to think of something. It crouched beside the pig-headed monster's corpse and studied it for a moment...

Before continuing, "But to prevent the 'pestilence' from spreading!"

"I have no choice but to dispose of this corpse!"

"If even the beasts are infected with the 'pestilence,' then your world must have it too!"

"Let me find your world's coordinates!"

"Once I've cleared the 'pestilence' from this world, I'll go to yours and clear it there!"

As it spoke, SCP-049 raised its slightly withered right hand and lightly touched the pig-headed monster's corpse. Then the viewers in the livestream...

Saw countless phantoms appear around it, only to vanish almost at once.

A moment later, when the last phantom had disappeared...

SCP-049 looked up toward the Great Worm Bridge in the monster world and said calmly, "I've found the world's coordinates!"

"Hold on a little longer!"

"I'll be in your world soon to treat the pestilence!"

SCP-049: The Reason the Demon Slayer World Was Riddled with Pestilence—the Corrupted Heavenly Principle Will!

(Third update. Please subscribe—your support keeps me writing!)

The powerful figures from the various native worlds watching the livestream froze when they heard SCP-049.

None of them had imagined it.

SCP-049 could find a corpse's home world from the corpse alone.

That ability was far beyond anything they had expected.

Once the shock passed, unprecedented fear rose from deep within their souls. There was no helping it. This ability posed too great a threat to them.

They had been able to watch the livestream as detached spectators.

They had even had the leisure to post the occasional teasing comment.

That was because they knew their worlds' coordinates hadn't been exposed. They had thought they were safe. But SCP-049 could find a world's coordinates through a corpse.

Didn't that mean SCP-049 would learn the coordinates of their worlds too?

They knew they hadn't sent anyone to explore the Demon Slayer World themselves. But their worlds were enormous.

There were bound to be plenty of reckless fools willing to enter the Demon Slayer World on the chance of striking it rich!

And from what they had seen so far...

It was only a matter of time before SCP-049 and its SCP-049-2 swept across the entire Demon Slayer World. When that happened, their worlds' coordinates would be exposed.

And once exposed, even if SCP-049 didn't come for them...

The unfathomable SCP Foundation would have those coordinates. Judging by how the Foundation operated, its people were all lunatics through and through.

Who knew what they might do to their worlds?

[Tatsumaki: @Monster King Orochi. What the hell have you done? Because of you, idiot, our world's coordinates have been exposed to SCP-049.]

[If you want to die, don't drag our whole world down with you!]

[You piece of trash!]

[Blast: @Monster King Orochi. You've really pissed me off. You're dead.]

[Monster King Orochi: @Tatsumaki @Blast! I didn't know it would turn out like this either. What matters now isn't fighting each other. We need to join forces.]

[That might be our only chance of survival!]

[Child Emperor: Join forces, my ass! This ends with one of us dead!]

[Hiruzen Sarutobi: Quite a few ninja from the Ninja World went to the Demon Slayer World too. It's only a matter of time before our coordinates are exposed. Sigh... All we can do now is hope the SCP Foundation doesn't wipe us out.]

[Ōnoki: @Hiruzen Sarutobi. Don't stake our lives on their moral standards. We need to prepare to fight!]

[Mei Terumi: Ōnoki is right! I propose a meeting of the five Kage. Check your private messages!]

[Sengoku: @Red-Haired Shanks, @Kaido, @Big Mom, @Whitebeard! Let's put our differences aside and join forces for now. I know the Celestial Dragons were in the wrong this time, but please set aside your grudges.]

[Otherwise... Joining forces is our only chance of survival!]

[Kaido: I'll join forces after you kill the Celestial Dragon who gave the order!]

[Whitebeard: I agree with Kaido!]

[Big Mom: I'd like to see a Celestial Dragon killed too!]