A week later......

With the efforts of tens of thousands of shadow clones, the Society of Scientific Truth, and the Mechanicus, Naruto Uzumaki dug a huge underground city 3000 meters below the existing territory of the Shinobi League.

Even the underground areas of the Demon Kingdom, Takigakure Village, and Nadeshiko Village, which had just joined the Shinobi League, were connected.

The outer perimeter of the underground city was built with bedrock, so even though most of the ninja world was hollowed out, there was not a single engineering accident.

At that time, several Hokage and Konoha high-ranking officials discussed what kind of underground city it was, but what they really envisioned was...

In a very small underground space, a shelter was built to accommodate the current people of the Shinobi League.

Can.......

Naruto is almost hollowing out the ninja world! ?

Everyone stood in the newly built underground city, looking at the black and gray stone walls around them, and they were still very nervous.

Even though Naruto's chest was pounding and he assured them that even if the sky fell, this underground city would not collapse...

Even Sasuke, who believed in his good brothers, was now panicking.

He always felt that something big was going to happen.

Everyone knows that anything Huang Mao promised...

We can basically imagine the worst possible outcome.

The dungeon was built 3000 meters underground. Naruto referred to the setting of the eighteen levels of hell in his previous life and dug a total of eighteen levels.

Adding the dungeon elements, it can be considered a combination of Chinese and Western styles.

The first floor is the upper floor, which is specially used as a living area for people and will also be the safest place in the future.

And each layer below...

In the future, this will become a place for everyone to gain experience and improve their abilities.

Naruto listed a level 1 to 90 classification based on the monster eggs that Uzumaki Stark had assigned to him.

Starting from the second floor, he placed some basic monsters in it.

The kind that doesn't use modules.

For example, creepers, spiders, skeletons, zombies, etc.

They are just some ordinary monsters.

The deeper you go into the second floor, the stronger the monsters will be.

They are roughly the same strength as Enderman, Piglin and other creatures.

Come to think of it...

It shouldn't be a big problem for the Ninja adventurers to deal with these monsters, right?

I think...

It shouldn't be a big problem for adventurers in the ninja world to deal with these monsters, right?

Although the difficulty is a bit high, the drops from these monsters and the treasure chests placed by Naruto on each floor are worth it.

The treasure chest contains some weapons that ordinary people can use, as well as potions to enhance strength, enchantment bottles, etc.

The rewards are extremely generous.

This can also be considered as a way for Naruto to motivate everyone to improve their strength.

Of course, since the treasure chests are all placed...

Naruto was worried that these people would not cherish this hard-earned opportunity to become stronger, so he specially imitated a certain old thief Miyazaki to design the levels.

For example, things like door-opening kills, bridge-crossing arrows, and treasure chest monsters are almost full of details.

Naruto believes that everyone in the ninja world will be grateful to him from the bottom of their hearts in the future.

As for the monsters on the lower level, the experience begins to become rich and interesting.

Like the Western fantasy module with slimes, dragons, skeleton mages, orcs, etc.

Or they could be monsters from the Wicked Beast module, or monsters from horror modules like Silent Hill.

Its strength is getting stronger and stronger, and the monsters' ultimate moves against shadow-level masters are coming one after another.

When it came to the last level, Naruto took into consideration that it would be difficult for everyone to pass, so he didn't make things too difficult for everyone.

So, he didn't release any monsters on the eighteenth floor.

He simply placed a golden apple engraved with the mark of the Flying Thunder God.

As long as someone uses the power to inspire it, he and Sasuke will be teleported to the scene.

Since it's all underground cities...

It seems reasonable that Uzumaki Naruto is the final boss.

Naruto stood in the dim dungeon with his hands on his hips, thinking back to the dungeon, and a sense of accomplishment instantly surged into his heart.

Tobirama's face was distorted. He looked at the dark dungeon-like passage in front of him and really wanted to go up and kick the yellow-haired guy twice.

Look at the surroundings...

The long and narrow passage had burning torches hanging on both sides, and the sounds of dripping water and squeaking rats echoed all around.

There are even some sounds that are very scary when you mention them.

At this moment, Tobirama was already screaming wildly in his heart.

asshole!

We are building a shelter!

It's not about building a huge dungeon that can hold people!!

Tobirama was really speechless about this kid.

In front of him, he saw Naruto take out a series of electrical equipment such as street lamps and lighting lamps...

Instead of leaving these things unused, you have to do such a shady job at the entrance, right?

Tobirama followed the yellow-haired man in the dark and gloomy passage. He felt something was wrong and pulled Sarutobi Hiruzen aside to ask him in a low voice.

"Monkey, you know him better..."

"Be honest with me... Is this guy trustworthy or not?"

Sandai touched his beard and suddenly realized that he had plucked out all the hair these days.

He could see Tobirama's uneasiness.

Actually normal.

Even though he had watched Naruto grow up, he still felt uneasy walking in such an environment.

Let’s not talk about whether this underground city, which is half the size of the Ninja World, will collapse.

The occasional howling sounds coming from the dark were quite creepy.

The third generation thought for a while and felt that no matter how outrageous Naruto was, he would not do anything to harm everyone.

Anyway...

Now this kid is the leader of the Ninja League.

If you spend so much effort to harm others...

What does this kid want?

After walking for a few dozen meters, the Sandai spoke to Tobirama very reluctantly.

“It should…should…be reliable, right?”

The third generation said this and recalled that during the construction process, Naruto was still farming and cultivating the fields in the underground city.

The food alone...

The third generation all felt that Naruto did a good job. At least everyone didn’t have to worry about going hungry when they came here.

"I saw Naruto stored a lot of food on the first floor."

"We even raise a lot of livestock like chickens, ducks, cows and sheep."

"I can't guarantee anything else..."

"But this kid is definitely reliable when it comes to farming."

When Tobirama heard this, he opened his mouth and looked like he wanted to say something but hesitated.

Jiraiya put his hands behind his head and walked beside Naruto, looking at the surrounding environment curiously as he walked.

"There are so many roads, why do you have to be so gloomy?"

He said and pointed to the torches stuck on the wall.

Sasuke also turned his head to look at the yellow-haired boy, unable to understand what this boy was thinking.

"You don't understand."

“That’s what a dungeon looks like.”

Naruto put on a serious face and said in a serious tone.

Less than two seconds later, he said with a smile again.

"The passage has to be cost-effective. The living conditions inside are no worse than those outside."

"There are hot springs, game halls, dance halls, and movie theaters."

“Everyone is going to love this place.”

Naruto really put a lot of thought into the living area on the first floor, so that everyone in the ninja world could experience a good life first, and then when they explored the second floor...

Let them know how dangerous the world is.

Of course, Naruto will give everyone a unique "identity token" with near-death teleportation before they enter.

"what?!"

At this moment, everyone's eyes lit up when they heard what Naruto said.

According to what I said...

It doesn't seem unacceptable that the passage is a little eerie.

........