The Land of the Sky is an island-type country located directly south of the Land of Thunder, and the country is about the size of the Land of the Vortex. In the original book, the headquarters of the Fourth Ninja War was located here.

At this time, on the side of the empty ninja village in the country of the sky, they secretly salvaged the steel throne of love from the inland sea of the country of rain in the second ninja war, and nearly thirty years have passed, and they used the power of a magical box to reactivate the steel throne created by love.

After that, the production of the Iron Throne was activated, and the Thunder Country's machine manufacturing was used as a framework to create a hanging iron castle that was much larger than the Steel Throne.

The shape of the Hanging Iron City is roughly gyroscopic, and the layered structure allows them to rotate staggered to generate a magnetic field.

At this point, using the earth's geomagnetic force, the two interacted to make the steel city suspended in mid-air and move in three-dimensional space.

Within the Hanging Iron Castle, the leader of the Empty Ninja Village, Mitetsu, is presiding over the operation of the Hanging Iron Castle. However, at this time, one of his subordinates ran up to him and said to him: "Your Excellency, the domestic steel supply is about to be unable to keep up, please make a decision!" ”

"Steel supply can't keep up? Is it a capacity issue? Frowning, Mitetsu asked.

In order to build this hanging city, the village of Kunin built six production lines in the country of the sky, and these six production lines smelted the iron ore excavated from the iron ore veins, and could obtain 100,000 tons of steel per day.

Now, steel is in short supply, and looking at the construction progress on the monitor, he turned his head and asked, "What the hell is going on!?" ”

"It's the iron ore veins that have been emptied...... the empty shinobi replied.

"The vein is empty!?" The answer of his subordinates was stunned for a moment, he looked at the screen with his fingers, and then said: "It's still far from the real formation of the Hanging Iron City!" …… And the closest vein to this is ...... In the Land of Thunder! ”

"Attention all the empty ninjas! ...... to longitude Latitude...... Advance! The order was given using the communicator, and the entire Hanging Iron City began to move slowly.

At this time, on the coast of the Land of Thunder, a city developed because of its geographical location.

Early in the morning, it was a good time of the day, and Rito yawned and was about to go to work.

After the Third Ninja War, the major powers of various countries entered a stage of peaceful development. Except for some disputes between China and small countries, people live in peace on the land of large countries.

Peace brings stability, and peace brings tranquility. In a peaceful environment, people's minds change from living to living better. At this point, a boom in commerce was inevitable.

In the case of Liren, the memory of childhood hunger seems to be in a previous life, and he has forgotten the smell of war. Now, he is only working hard to get a higher position, more salary.

"Wait a minute, wait a minute!" Biting into the rice balls he had just bought, he shouted as he squeezed into the bus that was about to close the door.

"It's dangerous! Almost late! With a long exhalation, Rito continued to eat the rice balls in his hand while observing his surroundings.

In the era of industrialization, the pace of people's lives began to become fast. A time for a leisurely meal is now gone.

Half an hour later, Liren got off the bus, and he threw the garbage in his hand into the trash can at the bus stop. Straightening up his suit, he walked to his company.

"Hum~~~~" Suddenly, Rito felt as if he had heard something. He stood there and felt it carefully.

"Not a hallucination!" The buzz grew louder and louder, and he turned his head to where the sound had come from. Then, he saw a steel fortress suspended above the city.

In the early morning sun, the steel fortress reflects a cold light. And in that light, Rito read a trace of hideousness.

Shaking his head at this, Liren threw out the feeling in his mind, and he felt that he must have thought too much.

What he doesn't know, however, is it a coincidence that humans are often able to perceive a sense of danger in a dangerous place?

No! The self processes the information of sight, hearing, smell, taste, and touch, and then compresses it into a simple signal to convey to the self.

This is the result of evolution, and it turns out that leaving the processing of information to the self and the ability to think to the ego is a very good choice. The fact that humanity was able to emerge in the Age of Savage proves that there is nothing wrong with this path.

"Oh~~~~" The glimmer of premonition of the person was not wrong, and with the sound of "oh" from the Hanging Iron City, an invisible fluctuation visible to the naked eye spread.

The radius of the Hanging Iron City is 400 meters, and the range of effect of the invisible fluctuation is also exactly 400 meters.

At this time, all the places that were shrouded in fluctuations, the glass of those buildings shattered instantly.

Crackling, the glass shattered into shards the size of a little fingernail and fell in pieces. No one was injured by glass on the road, not that there was no one on the road. It's the people on the road, all of whom are crushed into meat sauce by the force of invisible fluctuations.

Solid buildings are crumbling, visible ones of the same kind are being killed by unseen forces, and hell is descending! And the people who stood at the gates of hell, they looked at the destruction of hell, and they finally came back to their senses.

"Ah~~!"

Screams, cries for help, cursing voices, the streets were in chaos, and everyone followed their instincts and tried their best to stay away from here.

"Steel...... With so much steel in just a small patch, we've come to the right place! Seeing the collapse of the building, steel was sucked into the base of the Hanging Iron City under the action of magnetic force and smelted, and the Iron Mitsu couldn't help but laugh as he looked at the data.

"Lord Fang, there are a large number of high-energy chakra reactions that appear within the scope of the investigation!" On the right hand side of Mitetsu, an empty shinobi who was manipulating the instrument suddenly said.

"It should be the ninjas of Yunyin Village, destroy them!" The Imperial Iron didn't care very much about the ninja of Yunyin, and the existence of the Hanging Iron City gave him infinite self-confidence, so he said so lightly.

"Yes!" The empty shinobi on the left-hand side of the Imperial Iron side responded, and he opened a part of the arsenal of the Hanging Iron City.

Then, in the eyes of Liren who looked back from time to time, several cannon ports stretched out from the Hanging Iron City. The ninjas who stood on the roof of the building, dressed in cloud ninja costumes, were reduced to ashes along with the building itself in the orange-red pillars of light of the super electromagnetic cannon.

"Oh~~~~" invisible fluctuations reappeared, this time the range was a hundred meters larger than the last time.

Of course, in the shattered residue, a large amount of metal flew into the mouth of the anti-gravity furnace at the base of the Hanging Iron City.