Meddling The Omniverse

"What do you think?" Seth asked in the middle of a grassy field.

"This place feels fake," Seiya replied, staring at the hidden static stuttering in the sky. "Could this simulate our strength?"

"It could," Seth said, as a black blob oozed from his amputated stump. He grabbed the blob with both hands and, with a swipe, shaped it into a black claymore. 

Charging the claymore with red divine energy, he made an upward slash that split a hill in half. 

Seth propped the black claymore on his shoulder, "Anything else?"

Seiya said matter of factly, "Equipment."

A tiny shed arose from the ground. "The tiny shed contains any item you want, as long as you consciously think about it."

"Enemies for practice and testing."

A small podium emerged from the ground. Seth approached the podium and tapped it.

With contact, doll-like soldiers crawled out of the ground. "These modifiable moving dummies simulate how the world of Gaeabrande would react: causality, probability, space-time continuum, and all." 

Seiya tilted his head, "Terrain"

"Oh, you're right." Seth snapped his finger and another small podium emerged from the ground. He placed a hand on it and a boxing ring manifested before them. "Any more?"

Seiya closed his eyes, "magic casting."

"As in?"

"They should have magic, need a way to test against them."

"Ah… I see, the shed should be able to create them." from the shed he pulled out a small turret.

"This should do it," the turret whirled magic circles and shot magic bolts.

"Weather effects."

"included with the terrain."

"UI and system interface."

"Oh, wait a minute." Seth bonked the terrain podium and screens fluttered on Seiya's field of view.

Seiya looked around the UI and swiped all but those deemed necessary. 

—

Moments later, Seiya equips himself with light to medium armor and a standard medium sword, an elementary set that is versatile and flexible.

Seth nodded at his attire, saying his choices were smart and gave him decent protection without hindering his movement. 

"Now, then, should we start?"

Seiya just nodded.

"Then let me be selfish this time." 

"Huh?"

BWZZZT!!! 

A reality-warping explosion had occurred. Forcing Seiya to take cover from the ludicrous turbulence. What astonished him was that no harm befell him or his surroundings.

That explosion was of a magnitude that could flatten a city, but other than the initial pressure pushing everywhere at the beginning, not even a blade of grass was nicked.

Seiya finally returned focus, Where is that—!

He could see blood and an unknown essence trailing from the sky. He looked up and saw it. A god launched to the horizon.

Seiya sweated a bead as his memory finally recollected the events leading to all this.

In the beginning, after speaking the 'selfish' part, In the blink of an eye, with the previous claymore resting on his shoulder, Seth swung it straight for the fake soldier's neck.

The moment The blade touched that soldier's neck, Reality itself bent like rubber. That blade did not cut but stretched that neck and the space around it. Both the God and hero saw something terrifying quaking on their face. 

The overbearing causality of that world has descended with a vengeance. After that, Seiya's body failed to process anything.

In his eyes, everything turned black, blue, purple, green, and every other possible color on the spectrum, not a mix of all those colors, but perceived all those colors at once. For hearing, he felt tinnitus in the highest setting. As for touch, his body gave up on even understanding it.

From this, they both understand why the rules state that gods couldn't interfere directly, as this is the consequence one would get.

—That God! Seiya's mind snapped back to reality. He immediately dashed to his crash site, the direction Seth was blasted to.

What he saw was a sight to behold. A crater was formed, but not in the traditional sense. No fire was lit, no dirt was upturned, only jagged and broken pieces of space dusted the crash site.

All this anomalous site was worsened by the maddened laughing of the catapulted god.

Seiya became wary. At his sight, laid Seth, bloodied, in pieces, and smiling.

Red blood and unknown black liquid burst from his body like a water spout, yet he did not mind them bathing his face and body.

Half his head was gone, with only a mysterious black fog taking the missing place. 

His left hand was diced to literal sands, while his right leg was chopped to pieces. Yet the same fog held them together although loosely.

"HAH!!! I recorded everything!" Seth yelled with delight, sounding slightly incoherent due to not having half of his mouth.

"Seth…?" Seiya held his sheathed sword.

Suddenly Seth's facial expression changed to shock, but before he could process everything, a blade was placed on his neck.

"Why did you—No, explain yourself." Seiya inquired.

"OH, The data! Let's look at it now—"

"SETH!!!"

*Clack!* Seth's delirium snapped to clarity. His only undamaged eye looked all over his state.

Seth propped himself into a sitting position, but his chest separated from his abdomen. Making him plop to the bloodied ground again. 

"Sorry."

—

"CERCEUS! DOES IT GET THAT DESTRUCTIVE!?" Ristarte rushed to Cerceus for answers.

"Pretty much," Cerceus confirmed.

The two and a few other gods watched Seiya and Seth inside the time chamber. While time had been accelerated to a ridiculous degree inside the chamber, Seth, as a host, added a screen that showed a time-corrected version as a live feed for all to watch and see.

Ristarte was shocked by the devastating blast Seth had just faced, while others were impressed by Seth's courage to take it head-on.

During her initiation into the hero branch of the Isekai Department, she was explained why the organization avoids direct interference in mortal worlds, simply put: those worlds reject their presence.

The full explanation is that every world has its own rules and reality. When something—whether a person or an action—shouldn't be possible, the world automatically resists or restricts it. If the mismatch is too great, the world outright rejects it.

This applies to both people and power systems. For instance, a mutant with superpowers can enter a world with only magic, but it won't be able to use its powers because 'mutant superpowers' do not exist in said world.

For gods or powerful beings, it's even more challenging. These entities can't simply exist in said worlds because, at their core, those worlds do not have the concept of a 'walking and tangible god.' as something possible in their reality.

Then she remembered more from her history lessons.

Some individuals could escape their universe or world, but entering a new world is almost impossible, as those worlds can't handle their contrasting and powerful existence.

So, where do these beings end up after leaving their worlds? They find themselves in a barren, empty place. That place is the vacancy or gap between all worlds, many refer to it as the void between worlds. 

Over time, the beings in this void formed a coalition and eventually became the multiversal organization they currently belong.

Despite this, entering other worlds is still a problem. However, the organization's research led to ways around these restrictions, which gave rise to the Isekai Department. 

One breakthrough allowed people to transfer to other worlds by temporarily "re-coding" their identity to fit that world's rules. Although this method worked, it was only temporary and imposed heavy restrictions and consequences. Through this discovered method the Hero branch began its operations, as gods and their chosen heroes use it to aid different worlds.

Further research led to a modified version that allows permanent transfers, but only for those below a certain power level like our otaku Kazuma. This method formed the basis for the reincarnation-transmigration branch.

This was all Ristarte knew, as a good law-abiding goddess, she never even thought of doing naughty stuff like testing a world's limits. At times when she almost did, the slight pressure the world exerted on her already scared her enough.

Now for the first time in her life, she saw what could be considered the maximum backlash a world would do to those rulebreakers. And the offender this time was Seth, his partner… and he did it immediately, blatantly, and without hesitation.

Not even A MINUTE after entering that WORLD!!! She did label him as a daredevil but she never expected it to this level.

The screen finally shifted. 

Seiya, in his heroic attire, dashed to Seth's crash site. When the distance lessened and everyone saw what he saw...

"Oh my…" "Is he alright?" "What are those black sludges?" "No normal gods could survive that…" "Is that his rumored fog body?" "Yes buddy, it's the kind that gods couldn't shrug from. It won't normally heal." "Are those wounds real? This is a simulation, isn't it?" "I heard this new guy's the unkillable type but is it true?"

These were the murmurs being spoken when they saw Seth's current laughing yet mangled state. Many immediately called the medics, but only an inconspicuous staff came in.

"Your concerns for our lord are commendable, but that won't be needed, Those wounds are real, but lord Seth's survivability has reached that mythical line." the staff showed it on the screen.

Seth had just stood up before his upper half fell to the ground again, albeit his severed state was eerie, he had not shown even the slightest discomfort.

The gods were relieved, even though they were not close to Seth, his severely damaged appearance was too much. The god's small population evoked a certain camaraderie and they can't let Seth die in front of their eyes (usually). 

Now that the immediate danger was no longer present, they were discussing Seth's broken state with interest.

"So that's the Rumored indestructible fog." "To think he's still lively. Any other gods would already be on their deathbed." "It reminds me of ink, but why so sparkly?" "When will he go back whole again? How long was his hospitalization?"

Their conversation has been replaced from apprehension to intrigue fully focusing on Seth's bizarre body state.

Ristarte was the only one taking it differently. She said farewell to Cerceus and approached the staff, "Can I enter that time chamber to patch Seth up?"

The staff was slightly caught off guard "Oh how thoughtful of you lady Ristarte." Ristarte felt embarrassed by the response.

The staff not minding this continued, "That would not be needed your greatness. Lord Seth severely restricts you from entering the chamber at this moment due to future matters. As compensation, Lord Seth has arranged a free stay for you as an apology for the two-day training time."

Ristarte raised his eyebrows, "Wait? Did he? Why was I never informed of this?"

"Oh, lady Ristarte this arrangement was decided a minute ago by our lord."

"Hold up! So it was just moments ago!?"

"Affirmative."

"Then how could he arrange that?! Didn't the time chamber cut off communications?"

"Is still possible to arrange that lady Ristarte, as by technicality, this one's arranged from his avatar representative."

"Avatar representative?"

"His finger my lady," the staff bowed and clarified.

Hungh? So his mini him arranged it for me? "Now that I think of it…" She stared at the insides of the time chamber. "Where's that finger!"

—

"Seth…? Are you still in your creepy all-seeing room?" Ristarte whispered into the surveillance room.

"Still here," The disembodied finger replied.

With that, Ristarte entered the room. As she remembers, Hundreds of floating surveillance feeds hovered around, but her attention was immediately drawn to something else.

Her steps faltered as she spotted a hooded Seth casually flipping through a thick book. 

Beside him lay a chest and a strange table. To her, the table looked like a cross between an operating table and a high-tech workstation. 

"What… is this?" Ristarte asked, her curiosity piqued and slightly unnerved.

"A crafting table," the hooded Seth answered.

"Crafting… table? For what?" she pressed.

"For crafting a custom-made servant," he replied as if it were the most obvious thing in the world.

Ristarte blinked. "A servant? Like… one of those autonomous artifact spirits?" She hoped it was that because the other options were not… pleasant to look at

"Exactly," Seth confirmed, still flipping through his book.

Ristarte let out a breath of relief. Oh good, it's not some weird corpse-monstrosity thing. But then another thought struck her. "Wait, don't you need rare materials for that? Like mithril or enchanted crystals?"

"Hence the catalog." Seth gestured at the book, "The ones in our treasury are, unfortunately, too powerful for the world it's meant for." As a show of proof, he flicked the chest open

Ristarte's eyes bulged. It was overflowing with brilliant, otherworldly stones, each glowing with an intense, magical aura. Her eyes widened at the sight of these heaven-defying treasures casually piled up like loose change.

As if reading her mind, Seth lazily opened a portal next to him, reaching into the chest and pulling out a radiant crystal that seemed to hum with power. He tossed it into the portal with a flick, the result: the crystal bounced back.

"Too strong. They're all getting rejected," Seth muttered in mild frustration, still immersed in his catalog. "I'll need to find something weaker, but the transdimensional shipping costs for these materials are such a drag. Guess I'll have to bulk-order… maybe a thousand crates or so."

THUD.

Seth finally tore his eyes away from the catalog. There, on the floor, was Ristarte—collapsed in a dramatic heap, her hands clutching her chest as if in despair.

"He's too rich…" she muttered, her voice trembling. "NO… I'M TOO POOR!!!"

Tears streamed down her face as she stared at the treasure chest. The sheer extravagance, the ease with which Seth dismissed godly-level riches, was more than her mind could handle. 

She, a goddess, felt utterly impoverished by comparison.

Seth blinked, "I mean… it's just basic material requisition." he went back to his catalog.

Ristarte, however, was still on the floor, crying like a maiden in distress. "I can't… I just…"

She cries because the single payment she received from saving a world—where she campaigned a single hero against its threats—barely gets her even the tiniest treasure from that chest.

Yet reality threw a finger at her, Seth her partner, can just get a whole damn container of them on a freaking whim! THOSE ARE NOT CHEAP GRAVEL FROM THE STREETS! THOSE ARE TREASURES PANTHEONS KILL EACH OTHER FOR!!! She cried in her mind.

"Seth… how did you get so many of them…?" Ristarte asked weakly

Those words finally made him click, "Don't you know? oh wait how silly of me, you just knew me not long ago." Seth finally got his eyes off his catalog again.

"You know what, you'll learn later." Seth dismissed. 

But then Seth realized something, "Ristarte, why are you here?"

"Ah…" Ristarte, still in tears, remembered why she was here with Seth again:

First, she was curious about what he was up to.

Second, with the actual Seth training Seiya for at least two days, she had nothing else to do.

Third, Seth's next isekai was ready, and some other staff had asked her to remind him about it.

In the end, with swallowed pain, Ristarte reminded him of his imminent isekai duty. Seth, from all this, wore a peculiar expression. "Oh yeah, I forgot about that."