Welp, I did it again... sorry for the one year wait :')

I actually finished this chapter several months ago, but I just never got around to publishing it because of real life and other problems. I eventually forgot this even existed.

I might not continue it anymore, since it's been so long, but I'll probably do it if the Tensura community is still alive.

Chapter 4

The things that really change the world, according to Chaos theory, are the tiny things. A butterfly flaps its wings in the Amazonian jungle, and subsequently a storm ravages half of Europe.

What the hell is happening?

That was currently what Rimuru Tempest was thinking when Great Sage had alerted him about some possible threat just outside the village. It seemed like the other goblins and Ranga have encountered something dangerous, it was good that Ranga managed to sent out a telepathic message. But he still needed to find out what was the cause.

Running at speeds that would make an olympic runner look mildly slow in comparison, he headed towards Ranga's location and further into the forest.

"Guah!"

Skidding to a stop, Rimuru had arrived at their location, but the situation was not at all pleasant.

Gobuta's pained scream rang out as an old-looking swordsman inflicted cuts all over his body, making him fall to the ground unceremoniously. The other goblins as well as the tempest wolves were also on the ground, and unconscious. The only other one that was able to stand was Rigur, though he was injured from the looks of it.

Looking towards the group of newcomers intently behind his mask, he asked,

"Who... are you guys?" The group seemed like humans at first, but the horns and sharp nails that adorned their body confirmed them to be monsters. Their auras alone already proved it.

The group did not respond and just looked at him with cold gazes, the atmosphere was tense.

...

"Yah! Ah! Ah! Ah! AHHHH!" Or at least it would have been if it weren't for Gobuta's loud screaming.

"I got cut ssu! It hurts ssu! I'm dying ssu!" The goblin shouted with exaggeration as he was rolling on the ground. Rimuru just mentally sighed at his antics.

"Calm down. The wound is not deep."

With a splash, Rimuru hit Gobuta, as well as the other hobgolin, Rigur, at his side, with the recovery medicine that he had sto in his body, healing them instantaneously.

"Ri-Rimuru-sama!" Gobuta shouted in surprise. Ignoring him, Rimuru turned to the more responsible goblin.

"Rigur, explain the situation to me. What happened to the security team?"

"The collapsed men are all right. They are only sleeping because of a spell." Rigur explained.

Magic, huh? Rimuru thought briefly before turning his attention to the hobgoblin once more.

"I'm really embarrassed. Originally, we increased the security because of the monstrous aura, but I didn't expect it to be the ogre tribe..."

"Ogre tribe?" Rimuru repeated in surprise.

In my previous life, the ogres in games and movies looked bigger and more ferocious... but these guys don't like that at all. They even have armor. Also, those look like Japanese swords to me...

Before Rimuru could ponder more, a wolf's howl caught his attention.

"Ranga!" Looking upwards, Ranga was seen fighting two more ogres, a black-haired warrior with some sort of hammer and a ninja that was using a short sword.

Catching the wolf's attention, Ranga immediately leaped away from their fight and ran back towards Rimuru.

"Master, forgive me. This happened while I was here..."

"Don't worry, just leave this to me and get some rest." Rimuru told him. Ranga simply nodded and stepped besides Rimuru and turned towards the group of ogres.

Two more... that's six ogres.

"Hey, you guys. I don't know what happened, but sorry about what my guys did. Would you be willing to talk this out?" Rimuru asked them and spread his arms in a placating manner.

They're clearly much stronger, but Gobuta and Rigur weren't fatally wounded, and most of our security force was just put to sleep, not injured. There must be something to it... Well, I'll just have to be the adult in the room and-

"Show us who you really are, evil demon!" The ogre, probably the leader of the group, shouted before he could finish his thought.

Huh?

"Oi oi oi, what a minute! What did you just call me!?" The slime yelled in protest.

"Enslaving monsters in not an easy feat just any human can accomplish. You may hide your appearance and suppress your aura, but it won't work!" The ogre pointed at him accusingly, Rimuru could not even protest as more ogres accused him.

"Reveal your true identity." The old swordsman ordered him.

"For the mastermind to approach us himself is most convenient." This time, the ogre with the appearance of the ninja joined in with ganging up on Rimuru.

Yikes! But my true identity is just a lovable slime...

"Hey, listen, you guys..." Rimuru couldn't even explain as the leader of the group interrupted him

"We have no intention of listening to you. That mask tells us everything we need to know!"

"My mask? Wait a minute! Aren't you making some kind of mistake? This is just a keepsake of–" Rimuru got interrupted again as the the ogre pointed his katana at him.

"If it will serve to repay even a billionth of what was done to our brethren, we will have your head! You friend of those evil pigs!"

"What shall we do?" Ranga questioned.

"Do? I mean..." Rimuru was unsure how to continue before he remembered something.

"Ranga, which one of them can use magic?"

"Ah, it is the one being called mage princess, the girl with pink hair."

"Then I'll depend on you to restrict her." Rimuru ordered.

"But, Rimuru-sama, that would mean you'd be taking on five ogres." Ranga was slightly worried about his master, as even though he knew Rimuru was immensely strong, taking on five ogres alone was no easy task.

"Not a problem. I won't lose." Ranga simply nodded in response. The red-haired ogre however scowled and took a stance with his katana.

"You underestimate us. Are you truly brave or just foolhardy? Out of respect for your sheer nerve, I'll go along with your provocation."

"I hope you don't regret it later." The red-haired orge, the leader, told him and prepared to attack the slime.

The red-haired ogre then sprinted towards Rimuru with a mad dash, lifting his katana, he swung it towards Rimuru with the goal of slaying the ally of those who killed his brethren–

But Rimuru just instantly disappeared from his spot.

'What!?' The leader of the ogre exclaimed in his mind. Even as the swing of his sword had the strength to be able to create powerful gusts of wind, it didn't matter if it didn't hit.

'Where is he!?' Looking around, he could not find Rimuru anywhere, and as he turned around, he saw the slime. Rimuru was standing in front of his ally, the black-haired ogre.

Realizing that the enemy was in front of him, the black-haired ogre grunted and prepa to lift his massive hammer, but Rimuru raised his hand before that could happen.

"You can just take a nap." From his palms, Rimuru unleashed a green colored gas, paralysis breath, towards the huge ogre.

As if all of his energy were taken from him, the black-haired ogre's expression dazed and fell to the ground with a thud. Rimuru could not even rest for a second as a mace flew towards the air – and missed Rimuru by a margin as he crouched on the ground, as if he knew it was coming.

"Sorry, but I saw you with Magic Sense." Looking towards his assailant, Rimuru realized that it was the purple-haired ogre with the–

"Huge!"

–Bouncy melons.

"!" Feeling a little violated, the purple hai ogre stopped her next attack. As if realizing this, Rimuru immediately tried to come up with an excuse.

"Wait, that's not what I meant by "I saw you!"" Expression darkening, the ogre upheaved her mace and waved it towards the slime. Rimuru however just casually avoided the attack that shattered the very earth itself. "Don't get me wrong!" A steel thread was then released from Rimuru's palms, the thread multiplying and covering the ogre in a circle and bound her mid-air, rendering her unable to move any longer.

"Looks like you're about to fall, miss... Just kidding!-"

Not even letting the slime finish his sentence, a short sword abruptly struck Rimuru. With a 'Clang!', the sword shattered to several pieces as it collided with Rimuru's body armor that he cove his arm with. The wielder of the short sword, the ogre with the ninja outfit had a shocked expression as he witnessed what happened. Not letting the chance slip by, Rimuru dashed and withdrew his arm and punched the ninja ogre to the gut with a mighty blow. The ogre flew away from sheer force and collided to a tree. He crumpled to the ground, unconscious.

"Way to go!" Gobuta cheered from his spot, the other goblin at the side sha the same sentiment as he looked at the fight with awe.

"He beat us that easily?" The pink hai ogre, the mage princess, asked to herself fearfully.

"So, that just leaves..." As if nothing was impressive with what he did, Rimuru turned towards the last two remaining ogres, the old swordsman and the red-haired ogre.

"What will it be?"

"...The Evil Centipede's paralysis breath, the Black Spider's sticky steel thread, the Armorsaurus' body armor..."

This old guy! Rimuru's breath hitched as the swordsman named all the skills he showed in the fight.

"He may have learned the skills of many other monsters, as well. Do not lower your guard, young master."

He named all the skills I used, and the monsters they came from with just one look... I should try not to give too much away.

"Can we stop this? I'd like you to hear what I have to say now." Rimuru tried to explain, but the red-haired ogre just didn't seem to listen.

"Quiet, evil demon!"

"Okay, um... So, listen..." And for the nth time, Rimuru was interrupted yet again.

"I admit you are strong, but that makes me all the more certain. "

"Certain of what?" The slime asked, not understanding what the red-haired ogre was keeping on blabbering on about.

"You are one of them!"

"Them? Who?" Rimuru was getting more and more confused.

The leader of ogres just clenched the katana in his hands tighter. "It is unthinkable for us Ogres to be defeated by mere Orcs!"

"Orcs? H-Hang on, what makes you–"

"Quiet! I know it was all the work of you and your demon comrades!"

"What...?" Rimuru repeated confusedly.

"Don't deny it!"

"Wait! You've got the wrong–" And just at that moment, a sudden presence interrupted him.

The slime jumped away as soon as he sensed it, the old swordsman had managed to sneak behind him and swing his sword. His arm had gotten sliced off.

"I must be going senile. I was certain I cut off your head." The old ogre commented plainly.

Are they serious? The slime thought stiffly.

"Great Rimuru!", "Y-Your arm!" The hobgoblins called out in concern.

"I'm fine! Don't let your guard down!" Rimuru ordered them.

Did he get under my Magic Sense and break through my Multi-layer Barrier and Body Armor? How...

"Next time, I won't miss." The old swordsman commented, as if stating a fact.

"Looks like you were just foolhardy after all." The leader of the ogres spoke up, "I commend your courage to remain calm after losing an arm, but the pride that compelled you to take us all on alone will be your downfall!" He finished and lifted his sword in preparation.

"Regret your folly in your next life!"

...

Rimuru didn't say anything and picked up his severed arm on the ground. Holding it up, it transformed into slime matter and was promptly absorbed. The slime's arm subsequently regenerated in a few seconds.

The red-haired ogre gaped in shock.

"Did you really think you'd be able to beat me just by cutting off one of my arms?" The slime asked, waving his new hand to prove a point.

"F-Foul beast! Ogre Flame!" The red-haired ogre summoned searing flames in panic and cast it towards Rimuru. The flames enveloping the slime like a cyclone.

"Did I...get him?" The ogre said as what he witnessed next shocked him.

"Too bad. Fire has no effect on me."

The ogres were speechless. The demon was invincible.

"You were right, though. I did underestimate you... So in return, I'll show you what I'm like when I'm serious." An aura of darkness soon emanated from the Slime, nearly suffocating the ogres with its sheer power.

"What an aura..." The old swordsman commented. It told magnitudes of Rimuru's power when even he, a sword saint, was wary of the slime's aura.

"Take a good look." Black flames soon formed from Rimuru's palms as he raised his hand. The black flames grew into a massive cyclone above the slime, its heat was greater than the sun, and yet it did not affect the surroundings.

"That's... that flame is... It's not produced by using the surrounding magicule! The only thing producing that flame is his pure strength!" The mage princess exclaimed.

'And the size of the flame mirrors the size of his power...' The mage princess thought in worry.

"I'll show you something even more interesting. This is my true power!" Rimuru said as he raised his arms, and in that instant, a black-streaked lightning came from the skies and vaporized a nearby boulder that was the size of a car.

Maybe I should've kept that one under wraps...

"What now? Still want to fight?" The slime asked the red-haired ogre. The ogre scowled in response.

Good, he's scared. Please just surrender now! Rimuru really didn't want to continue the fight any longer.

"Young master, please take the princess and flee. I will end this."

"Quiet, old man."

The red-haired ogre seemed to conclude something as he stepped forwards with his sword.

"It saddens me to say this, but it seems that we are no match for you. Still, I have my pride as the next leader of the powerful Ogre clan! What leader would fail to avenge his slain brethren!?" The red-haired ogre exclaimed in resolve as he took a stance.

"Even if I can't win, I will still fight back!"

"Young master, if you fight, I will fight by your side!"

That's their answer? Well, damn. That backfired on me...

Just as he was contemplating on what to do next, the sound of clapping drew everyone's attention.

What?

Rimuru distractedly looked towards the source, everyone else following his gaze to see what it was.

At the top of another large boulder, was an androgynous human(?) child who looked to be around 14-years old, he had white hair and wore contrasting pitch black clothes. He had a disturbing smile on face while he was clapping, amused at the sight before him, as if it was but a mere play and not a group of monsters fighting one another.

What disturbed Rimuru the most, however, was that he could not sense him whatsoever.

[Unable to detect individual. A skill may be in effect to disrupt Magic Sense.] Great Sage had informed him. If he was in his slime form, then he wouldn't have even been able to know he was right there.

Who is this? Is it just a normal human?

Rimuru highly doubted that a normal human had the ability to disrupt [Magic Sense], but was the boy doing here? He was not a very skeptical person, or slime in this case, but even he doubted that a normal person would dare enter the Great Jura Forest without being an adventurer of some sort, much less watch highly dangerous monsters fight each other with amusement.

He was not a mere civilian. That much was certain.

"I have to say, it's been a few days since I've arrived here and this is the first time I've witnessed a fight like this. It was entertaining, watching a one-sided beatdown, but you guys were way too weak to make the fight more interesting. Well, I suppose it's expected of trash mobs." The boy commented with indifference at the ogres. They were B-ranked monsters, and yet they were treated as 'trash mobs'?

"You bastard! How dare you mock us!" The red-haired ogre exclaimed in fury at being mocked. How dare a human like him ridicule them!?

"Shut up. You're too loud and annoying." The boy commented tersely.

"Wait, can we stop this for a second? Who are you and what are you doing here?" Rimuru asked the stranger in confusion.

"Ah, yes. I suppose introductions are in order... Call me "Ain", I'm what you would call an otherworlder." Rimuru perked up at the mention of 'otherworlder', it was the second time he met one aside from Shizue-san. Though Shizue-san wasn't quite as... rude as this fellow.

"For now, my goal is to find out more about this world. But you see, from what my assistant told me, there's quite a lot of dangerous individuals that could be an obstacle to my other objectives. Those obstacles consist of The Demon Lords, True Dragons, and apparently the Freedom Association's guild master... and they're annoyingly powerful. So, I need to amass more power." The boy shrugged, oddly sounding like he was looking forward to the supposed 'obstacles' he mentioned.

"Hey, Rimuru, was it? I'll give you a chance to join me. Accept and I won't have to end your lives." The boy offered with the slime. The last statement immediately made the air tense, but it didn't seem to affect the boy himself.

"..." Rimuru did not know how to properly respond to such a question. In the first place, he was already trying to build a country himself, one where monsters could live freely. Joining a random stranger at something he didn't even know the exact details of would not just be unproductive, but really stupid.

"Sorry but-" Rimuru started to decline, but the boy already sighed as if he expected it.

"Knew no one sane would actually accept... well, I suppose it can't be helped then..." Rimuru as well as the others who were silent between the conversation immediately tensed as the boy got up from his sitting position.

What is he going to do now?

Everyone, aside from the downed ogres, were looking at the boy with wariness.

It was not until a moment later that he vanished.

And all hell broke loose.

XXxxXX

It has already been a few days since I arrived in this world, and I already had lots of progress.

So far, I've been wandering around this entire forest to search for anything interesting while creating more skills with [Custom Skill Creation], which was proving to be incredibly broken as an ability.

The first thing I did with my new skill was of course create a skill that allowed me to gain more magicule. Magicules were basically the essential building blocks that allowed magic or physics-breaking phenomena to happen. As exotic matter, it was quite convenient.

Anyways, the more magicule I had, the more energy I had to create more skills. So it was quite necessary to have a way to obtain more of it.

To do this, I created a skill that allowed me to gain more magicules just by existing, it was a unique skill called [Magic Core]. It had three following properties, one it constantly absorbs any and all magicule in the surrounding area, two it refined the magicule it absorbed to become far denser and more powerful, and three it greatly improved all magic-related abilities. I had wanted to make a skill that could create magicule out of nothing, but it seems like even unique skills have its limits, so I opted for something like [Magic Core] instead.

After I had gained [Magic Core], the amount of magicule I had grew considerably, and it's growing even now as I speak. The increased amount of energy allowed me to have more freedom and creativity in creating skills.

The second thing I did was improve my assistant, evolving from extra skill [Assistant] to unique skill [Supreme Assistant]. It had three effects, the first was Analysis and Judgement, which allowed it to analyze and judge anything I ask it to. The second was World Record, which allowed access to the record of the world itself and all of its information. I could ask anything about this world, and it would answer it. Of course, asking too much would make things incredibly boring for me, so I just did the bare minimum in acquiring information. The third effect was Improvisation, which allowed the skill to improve itself and add new effects every time it proved insufficient. It was, indeed, accurate to call it the [Supreme Assistant].

Now, after obtaining a means of gathering more energy as well as information, the last thing I did was of course improve my combat capabilities. And let me tell you, the amount of experimentation I did was absolutely fun.

Of course, while the process was incredibly fun, the sheer number of skills I made were way too many so I won't bother listing them all. Though to give an idea of how hilariously bullshit it was, I had an extra skill called [Disintegration], which, as the name says, literally disintegrates matter upon contact, entirely disregarding durability. And that was just my beginner attempts at making skills, I had tons of various ideas.

[Custom Skill Creation] was truly the most broken skill in existence.

Though, disappointingly, even when I had made all these skills, I had nothing to test it on, at least meaningfully. Or at least, that's what I thought until I saw a bunch of high ranked monsters fighting each other while I was wandering around the forest. It was interesting to see a slime that took the form of an androgynous child, more so when I found out they also came from the modern world by using [Telepathic Radio] to read his thoughts. The ogres the slime was fighting was pathetically weak though, aside from maybe the sword guy, but watching them get curbstomped by a slime that had the build of an elementary student was pretty amusing, so I didn't interrupt the fight then and there to test my skills on them.

As you can tell right now, I decided to intervene when Rimuru brought out his extra skills. The remaining ogres didn't even surrender or retreat after Rimuru showed them how outclassed they were, so I figured they just had a death wish. Well, I suppose having your entire clan get eaten by a bunch of orcs would make you suicidal, but really, who am I to judge?

The orc thing was interesting though, I'll have to read the ogre's memories to find more about it. I might make those orcs a part of my soon-to-be-created country, specifically my army. I just figured the idea was interesting, I totally did not take the idea of creating a country from the slime at all by reading his thoughts. Nope, not at all.

Anyways, I tired to negotiate with Rimuru for them to join me, but it seems like that failed. Oh well, I guess one can't be that lucky.

It was his loss anyway.

I looked down from the huge rock I was standing on as I observed the unfortunate souls that I was about to test my skills upon. I wonder if they could even manage to fight back. It was probably impossible, for the ogres at least, I wasn't too sure about the slime, and I didn't want to ask [Supreme Assistant] to ruin any potential surprises. Well, mysteries always did make things more interesting.

I just hope this won't be a waste of time on my part.

As I stood on my platform, a moment passed, and I acted.

Without missing a beat, I activated the extra skills [Mental Supremacy], [Reinforcement], and [Amplification] all at once.

Time immediately stood to a crawl as my perception of time heightened to a hundred-fold and my cognitive capabilities increased to match a supercomputer. My body was reinforced to unnatural lengths in nearly every conceivable level as it grew harder than steel and became powerful enough to lift a truck in one hand, it was then further strengthened as it was amplified and reinforced in conjunction. My skills worked in harmony as my physical body grew in capability by several magnitudes in the span of a few milliseconds.

I then stepped forwards, and moved in front of the red-haired ogre instantly, the sound barrier being broken several times over. I raised my fist and punched him in the torso.

His upper body then promptly exploded in a shower of blood and gory chunks of heated flesh, the remaining chunks being thrown several hundred meters away from the sheer force that hit his body.

The ogre died before he could even form a thought.

Hm, like I thought, this was far too boring for me. I can't be challenged if I only needed a single punch to kill them...

To make the fight less boring, I deactivated the extra skills that powered me, turning me back to my default state, though even without the three extra skills powering me up I was still far stronger than the average human, as I already found out a few days earlier when I tried to see how my new body compared to my old one.

Well, I guess this will have to do.

"YOUNG MASTER!" I jolted in surprise at the shout and turned around - only to duck when my head was almost decapitated by a sword being swung faster than a normal human could perceive.

"What the hell-" I tried to form out - before the edge of a sword flickered in my peripheral vision.

Stop.

It stopped just millimeters away from my neck.

That was close. I would have died if I hadn't activated [Mental Supremacy] in time.

Time stopped to a crawl as my perception of time was multiplied by a hundred-fold. Following the use of [Mental Supremacy], I immediately initiated [Reinforcement] and [Amplification] afterwards to boost my body further like before. This allowed me to go around the sword moving blindingly-fast with ease as it moved at a snail's pace compared to my current perception of time.

The one who nearly killed me was the sword guy with the red ogre. For an old man, his skill was impressive, I would have died if I hadn't reacted fast enough.

The thought annoys me.

With some irritation, I stepped in front of the old guy and formed a blade of energy around my finger. I swung it across his entire body several hundred times over before stopping.

He erupted to an explosion of blood afterwards as his entire body was sliced into pieces tinier than blood vessels. The blood that erupted covered me, making it look like I got splashed with red paint.

"This is a little... irritating." I commented drily as I stared at my body covered in blood. Great, now the perfectly badass clothes I made using [Transmutation] was ruined. Should I make a skill to clean this? I didn't really think of such a thing since it never crossed my mind to use my most broken power for such a mundane purpose before. I suppose that was an oversight on my part.

"No... no!" An anguished scream caught my attention as I turned to find the pink-haired ogre with tears from her eyes, her expression mirroring immense shock. She could barely register her companion's death due to how fast it happened. Her mind seemed to have been overloading itself from trying to process it.

Dispersing the magic blade around my finger, I stepped forwards to walk towards the pink-haired ogre. Blood splashed as I walked over the pool of blood from the two dead ogres, a pool that the pink-haired princess would soon join.

"AHHHH!" A sudden shout interrupted me as a mace swerved towards my face. I merely backhanded it away in annoyance.

Who was it this time?

Looking at the offender, I saw that the purple-haired ogre had broken free of the thread that tied her up. She was now moving towards me like a crazy person, screaming with bloodshot eyes.

Sadly for her, I don't have time for fodder who can't even escape some shitty thread.

I raised a finger and fired a concentrated beam of heat in the center of her forehead. The beam completely went through her head and vaporized her brain from the inside, making her lifeless body fall to the ground in an instant.

I was only just getting the hang of Magic a while ago, but I suppose magic manipulation like this was enough for nameless mobs.

Now, where was I?

Going back towards my previous objective, I continued my way to the third ogre while contemplating on what I should do with her. I was planning to take it easy with the ogres, but the sword guy from earlier had annoyed me too much that I didn't even want to bother. The only saving grace was that I could still fight with the slime afterwards. That should be something to look forward to, right?

As if the slime had heard my thoughts, a blue blur suddenly appeared in front of the catatonic pink-haired ogre, it was of course Rimuru. His back was turned towards the pink-haired as if protecting her, his expression was completely serious, including his aura, it differed heavily from the carefree atmosphere he had going for him earlier.

Took him long enough. Well, the "fight" did start barely 10 seconds ago, so I can't really blame him. I'm actually a little surprised he got over it fairly quickly, considering he lived in the modern world before.

"Stop this, now." Rimuru warned me as his aura rippled with barely controlled fury, surprising me a bit. It was comparable to mine. In fact, if I didn't have [Magic Core], his energy would have likely eclipsed mine several times over... I grinned.

The real fight had only started now.

Anndd to be continued!

Now that's a cliffhanger! I ended the chapter before the fight between MC and Rimuru could actually begin! I'm so evil!

Anyway, yes, I did in fact kill nearly every single one of the ogres. But don't worry! I'm not planning to kill off every single one of the main cast, especially not Rimuru... maybe. Yeah, it would be way too boring if I did that.

Really, though, there's more interesting stuff that I've thought of for future chapters, so look forward to that!

Of course, I still don't know if the Tensura (this fandom)'s community is actually still alive, so I'm a little hesistant in making the next chapters. Seriously, I don't want to write a ton of chapters only to find out that the result of my tears and blood weren't even read by a single person... though that's mostly exaggeration, but you get my point.

Anyway, look forward to next chapter! (If that actually comes out)