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Naruto : The System Files

Naruto has always had video games to fall back on growing up while the rest of the village pretty much treated him like garbage. What happens when Naruto wakes up to find his life has become one of the video games he loves so much. -------------------------------------------------------------- Disclaimer: I don't own Naruto. Any similarities between real people, living or dead, or places, standing or demolished, in this story are just coincidences. But if you like what I do and want to support me, you are more than welcome to donate on Place of Patrons.

Adamo_Amet · อะนิเมะ&มังงะ
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87 Chs

Chapter no.8 Rat Dungeon

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If someone asked Naruto the place he'd least like to visit, without hesitation, he'd say the basement.

With a grimace, he delivered another forceful kick to the stubborn basement door.

"Open up, you damn door!" he grunted, frustration building.

Another kick.

"Bastard landlord," he muttered under his breath, "can't install a decent door at the front, but sure, let's make Fort Knox out of the basement door!"

His comment was accompanied by yet another hefty kick.

Finally, with a creak that seemed to groan in defeat, the door swung open, revealing the dismal sight of his basement.

The room was dimly lit, with only a few slivers of light sneaking through the small, grimy windows.

Cobwebs clung to every corner, and a musty, almost moldy smell wafted up, assaulting Naruto's nose.

"Ugh, what a dump," Naruto exclaimed, stepping gingerly over the threshold.

The floor felt sticky under his feet, and he could swear something skittered away into the shadows as he moved forward.

"Great, probably more rats than a sewer down here," he grumbled, his eyes scanning the room.

He looked around, half expecting to see something jump out at him.

[ Would you like to use item "Dungeon Key"? ]

Naruto confirmed, and suddenly an ethereal keyhole materialized in front of him.

He took out the dungeon key and inserted it into the keyhole.

As Naruto turned the key, he heard the familiar click of a lock opening. Suddenly, the keyhole before him began to crack like a mirror.

He watched in awe as the cracks spread, weaving through the air and creating a door that floated in the middle of the room, unattached to any wall or hinge.

Awesome.

He looked at the system window.

"How did you do that dungeon," he said aloud, half expecting an answer.

The system remained silent.

Naruto sighed and muttered to himself, "I need to prepare some things before I go in there."

[ 30 Minutes Later ]

Naruto stood in front of the mirror, surveying his makeshift armor with a critical eye. He had assembled an eclectic array of items he thought might be useful: stink bombs, a rubber chicken, kunai, shuriken, and his DIY armor. The armor was a haphazard creation of wood and plastic pieces, all held together with copious amounts of duct tape wrapped around his body.

Looking at his reflection, Naruto couldn't help but chuckle at the sight. His armor was bulky and uneven, with wooden planks jutting out at odd angles and strips of plastic awkwardly taped across his chest and limbs. The duct tape was wrapped haphazardly, crisscrossing in a chaotic pattern that was more comical than intimidating.

"Well, it's not exactly ninja gear, but it'll have to do," Naruto said to himself, adjusting a particularly loose piece of plastic on his shoulder. He tucked the kunai and shuriken into his belt, the rubber chicken dangled from his side - a bizarre addition to his already unusual outfit.

He gave himself a final once-over in the mirror.

"Alright, let's do this," he declared with a determined nod, ready to face whatever the dungeon beneath his house had in store.

As Naruto opened the basement door and stepped inside, a notification from the system immediately popped up:

[ Dungeon Entry Detected ]

[ Welcome to the Rat Dungeon ]

[ Objective: Clear the dungeon by eliminating the mischief of rats. ]

[ Warning: Be cautious of hidden traps and unpredictable enemies. ]

[ Rewards: Successful completion will grant 100 Experience Points. ]

[ Failure: Any exit before completion will result in loss of reputation with Landlord. ]

[ Dungeon Difficulty: Beginner ]

[ Warning: Level 2 or above is recommended for optimal survival. Proceed with caution. ]

Naruto cautiously made his way through the dungeon, his eyes scanning the surroundings illuminated by the glow of unusual rocks.

As he observed them closely, his 'Observer' feat triggered, revealing information about the rocks.

[ Item: Rat Ore ]

[ Type: Magic ]

[ Description: An ore made from the feces of rats of the dungeon ]

Naruto wrinkled his nose in disgust.

"Aw man, why did it have to be poop?" he groaned.

Just then, he heard a sound.

Reacting swiftly to the situation, Naruto activated the Transformation Jutsu, noting that he felt himself being guided by the system as he channeled his chakra, focusing it throughout his body.

He formed the necessary hand signs, each movement precise and deliberate.

As he did so, he created a flowing layer of chakra around himself.

This chakra was special; it was manipulated to reflect light in a specific way.

As Naruto completed the sequence of hand signs, the moving chakra began to interact with the light in the environment.

It bent and reflected the light around him, crafting the illusion that he had transformed into one of the glowing rocks scattered around the cave.

The chakra effectively camouflaged him by manipulating the light waves, making him appear as if he were simply another inanimate object in the dimly lit cavern.

Though he remained in his original form, to any onlooker, Naruto had seamlessly become indistinguishable from the rocks due to the optical illusion created by his skillfully controlled chakra.

A giant rat, by normal standards, entered the area. It looked around, unaware of Naruto's presence.

Naruto observed it closely:

[ Name: Chakra Rat ]

[ Status: Relaxed ]

[ Title: Dungeon Monster ]

[ Level: 1 ]

[ Class: None ]

[ Race: Rattus anthropomorphus ]

[ HP: 30 / 30 ]

[ AC: 1 ]

[ CP: 100 / 100 ]

[ Lineage Traits:

- Long Tail

- Sharp Tooth ]

[ Class Features: N/A ]

[ Feats: N/A ]

[ Stats: ]

- [ STR: 8 ]

- [ DEX: 8 ]

- [ CON: 8 ]

- [ INT: 8 ]

- [ WIS: 8 ]

- [ CHA: 8 ]

- [ VIT: 8 ]

- [ LUK: 8 ]

[ Allies: Mischief of the Rat Colony ]

[ Equipment: N/A ]

[ Description: A low-level dungeon monster that roams the outside of the dungeon ]

Surprised by the rat's appearance, Naruto prepared to attack.

He quietly pulled out a shuriken.

The shurikens spun through the air and struck the rat in the eyes.

The rat screamed in pain but couldn't locate its attacker.

Seizing the opportunity, Naruto used 'Kunai Bukijutsu' and swiftly slit the rat's throat.

[ Congratulations! You have defeated 1 dungeon monster: Chakra Rat ]

[ Achievement Unlocked: First Dungeon Conquest ]

[ Reward: 200 Experience Points ]

[ Kunai Bukijutsu - Level: 2 (Active) ]

[ Chakra Points (CP) Required: 7 ]

[ Description: A weapons technique for Kunai, enhancing both melee and ranged combat proficiency. ]

[ Passive Enhancements: ]

- [ Kunai Accuracy: Increased by 15% ]

- [ Kunai Parry: Enhanced by 15% ]

[ Active Boost: ]

- [ Strength (STR) Increase: Additional 15% for 20 seconds upon activation. ]

....

[ Shuriken Bukijutsu - Level: 2 (Passive/Active) ]

[ Chakra Points (CP) Required: 7 ]

[ Description: An improved weapons technique for Shuriken, further honing ranged combat skills. ]

[ Passive Enhancements: ]

- [ Shuriken Accuracy: Increased by 25% ]

[ Active Boost: ]

- [ Ranged Damage: Additional 10% increase for 20 seconds upon activation. ]

Surprised by the sudden improvement in his skills, Naruto realized that using his skills to defeat the dungeon monster must have contributed to their leveling up.

"Is there another way to level up skills?" he wondered, his mind buzzing with questions.

His thoughts were abruptly interrupted by the sound of footsteps.

Turning around, Naruto found himself face-to-face with something he hadn't expected: a humanoid rat wielding a spear.

[ Name: Rat Spearman ]

[ Status: Furious ]

[ Title: Dungeon Monster ]

[ Level: 3 ]

[ Class: Knight ]

[ Race: Rattus anthropomorphus ]

[ HP: 50 / 50 ]

[ AC: 3 ]

[ CP: 120 / 120 ]

[ Lineage Traits:

- Long Tail

- Sharp Tooth ]

[ Class Features:

- Spearmanship ]

[ Feats: N/A ]

[ Stats: ]

- [ STR: 10 ]

- [ DEX: 13 ]

- [ CON: 8 ]

- [ INT: 8 ]

- [ WIS: 8 ]

- [ CHA: 8 ]

- [ VIT: 8 ]

- [ LUK: 8 ]

[ Allies: Mischief of the Rat Colony ]

[ Equipment:

- Garbage Spear ]

[ Description: A guard that roams the outside of the dungeon ]

Naruto clicked his tongue in annoyance and quickly threw a kunai at the Rat Spearman. However, the monster deflected it skillfully with its spear.

As the Rat Spearman lunged forward with its spear poised to strike, Naruto instinctively activated the Substitution Technique. He felt a surge of chakra explode from his ankles, propelling him forward at an astonishing speed.

For a fleeting second, he moved so fast that he left behind nothing but a cloud of smoke and a decoy—a log he had prepared earlier with a storage seal.

In the midst of the smoke, where Naruto had just stood, the dungeon monster's spear thudded into the log, momentarily deceived by the substitution. From his new position, Naruto quickly regained his footing, barely pausing as he pulled out a kunai. This wasn't just any kunai; it was wrapped with an explosive seal, primed and ready.

With a swift motion, Naruto aimed and hurled the kunai back toward the Rat Spearman.

As the kunai struck the Rat Spearman, the explosive seal attached to it detonated with a deafening blast.

The explosion engulfed the dungeon monster in a burst of fire and smoke, sending it reeling backward.

The Rat Spearman screamed in agony, temporarily blinded and severely disoriented by the sudden and violent explosion. Its movements became erratic as it tried to regain its senses.

Seizing the opportunity, Naruto used Kunai Bukijutsu to hit both of the monster's eyes. The Rat Spearman thrashed about in pain, now an easy target. Naruto continued his long range assault, running around the monster and striking it repeatedly.

A few minutes later, a sweaty and exhausted Naruto stood over the defeated Rat Spearman. He had earned his victory, but it had taken a lot out of him.

[ Congratulations! You have defeated 1 dungeon monster: Rat Spearman ]

[ 40 EXP has been earned ]

[ Player Naruto's EXP has reached 300 ]

[ Congratulations! You have leveled up ]

[ You have been awarded 2 Stat Points for leveling up ]

....

[ Class Feature: Fuinjutsu ]

[ Level: 2 ]

[ Description: The art of sealing, originally crafted by the son of the Sage of Six Paths and subsequently mastered by the Uzumaki clan. Fuinjutsu is so closely associated with the Uzumaki that it is often mentioned in the same breath as the clan itself. ]

[ Passive Enhancements: ]

- [ Seal Efficiency: Reduces chakra cost for creating and applying seals by 10%. ]

[ Active Boosts: ]

- [ Adaptive Sealing: Seals dynamically adjust their containment strength based on the nature of what they are sealing, increasing efficiency by 10%. ]

[ Fuinjutsu Scroll Library: ]

- [ A Fuinjutsu seals are recorded here. ]

1. Explosive Seal

2. Storage Seal

( Either level up or interact with more seals to increase library )

Naruto's smile of triumph was short-lived as he suddenly heard more monsters approaching.

The sound of their steps was getting louder, indicating that they were almost upon him. Panic started to set in as Naruto tried to think of a plan. He knew he couldn't fight multiple monsters at the same time.

As Naruto quickly assessed his situation, he glanced at his stats:

[ Stats: ]

- [ STR: 12 ]

- [ DEX: 12 ]

- [ CON: 10 ]

- [ INT: 11 ]

- [ WIS: 10 ]

- [ CHA: 9 ]

- [ VIT: 11 ]

- [ LUK: ? ]

With the sound of the monsters drawing nearer, Naruto knew he had to act fast.

"Okay, think, Naruto, think! Agility is key here – I need to be faster, dodge quicker. And my brain could use some boosting too – gotta be smarter about this. And awareness, yeah, that's important – can't let these monsters catch me off guard."

Naruto realized he had 6 stat points available for allocation. He quickly decided to distribute them:

[ Stats Updated: ]

- [ DEX: 14 ]

- [ INT: 13 ]

- [ WIS: 12 ]

As Naruto allocated the stat points, he immediately felt a tangible change. His mind became clearer than ever, thoughts flowing more smoothly and rapidly. His body felt lighter and more agile, as if he could react to anything in a split second. Ideas for tactics and strategies began to pop into his head, a new level of creativity and insight that he hadn't experienced before.

"Is this because of the stat increase?" Naruto wondered aloud, trying to make sense of these sudden enhancements.

He paused, a question forming in his mind. "Wait, why didn't I get this kind of feeling at level 1?" He pondered possible answers:

Maybe the system only grants noticeable physical and mental changes after a certain level.

It could be that the initial stats were baseline, and only additional points create perceivable effects.

Or perhaps it's like muscle training; you don't feel stronger immediately after the first workout, but over time, the improvements become obvious.

With the echoing footsteps of the monsters getting closer, Naruto took a deep breath and closed his eyes, tapping into his Mind's Eye ability. He focused, visualizing the incoming threats as blips of energy in his mind's landscape. Each movement, each shift in their approach became crystal clear, allowing him to anticipate their next moves.

Quickly, he reached into his pouch and pulled out an empty scroll. With a deft movement, he took a kunai and pricked his thumb, squeezing just enough to get a drop of blood.

Carefully, he let the blood drip onto the scroll, activating its sealing properties.

With a determined grin, Naruto whispered under his breath, "You monsters are going to see why I am the greatest prankster in Konoha."

....

[ Author's Note: As explained in this chapter, the mechanism for the Transformation Jutsu is a simple reflection and refraction of light, not shapeshifting. I know there is a trope in Naruto fanfics where Naruto can shapeshift, but I refrained from going that route for one simple reason: shapeshifting is too overpowered. For example, if Naruto is facing off against an enemy Jonin, why doesn't he just jump into the sky and shapeshift into a whale to kill the enemy? It's too powerful, especially considering Naruto's ability to create 1000 clones. Now, imagine 1000 whales dropping from the sky. Exactly.

Second, the Substitution Jutsu isn't a space-time jutsu. I have read fanfics where it is, and to that, I say why? If Substitution Jutsu is a space-time jutsu, why even bother learning anything else? In this fanfic, Substitution is just a high-speed movement and dodging technique. When Naruto uses Substitution, he prepares a log inside storage scrolls. He activates the jutsu by channeling chakra into his ankles as he moves, leaving behind a puff of smoke. The log is released from the storage seal, substituting the place of the user, while the user moves to a safe location. This jutsu works for about 10 feet and has a flaw: tunnel vision. If the user looks at a certain location to move, an enemy notices it and then just attacks where the user is supposed to appear. It's useful, but not overpowered.