"This is Upside Down Mountain, Mr. Ultraman, let's go down and have a look."

"Okay, Luffy, sit tight."

Ultraman Ace nodded to Luffy in his hand, and the direction of his flight turned and began to descend rapidly.

A few seconds later, Ultraman Ace turned into a ray of light and lowered Luffy and Ace to the ground.

"Whew, I really didn't expect to be able to return to this place, it was quite exciting when I climbed the upside-down mountain."

As soon as Luffy landed, he jumped on the ground several times, although he was also supported by Ultraman Ace when he flew in the sky, but after all, he didn't feel any reality.

Now he doesn't have a boat to sit on, and if he falls down, he will enter the sea, and then change his surname to Chen, and his name will be Chen.

"Well, I really miss it, the last time I was here seems to be the last time."

"Mr. Ultraman, that's what I told you, the flow of water that is not limited by gravity."

Ace and the others landed on the top of the side of the Upside-Down Mountain, between the East China Sea and the Great Shipping Route.

In front of them, it is from the East China Sea to the upstream, the water gathers to the top of the mountain, and then merges with three other waterways, and finally rushes into the great route, like a fateful version of the rapids.

No matter who comes to this strange and magnificent upside-down mountain, they will sigh from the bottom of their hearts.

Now, of course, except for Ultraman.

"Well, sure enough, the gravity anomaly here is very serious."

With the help of Ace's somatosensory, Ultraman Ace felt the gravity on the upside-down mountain and said.

"Is there one? Why don't I feel like there's anything wrong with me? ”

Ace stood on the ground and tried to jump as well, no different from jumping somewhere else.

During this time, he has been following Ultraman Ace to investigate everywhere, and Ace has learned some cultural knowledge, knowing that if gravity can be so abnormal that the water flows backwards, the person himself will definitely not be comfortable.

"Yes, because the gravity here is anomalous, but it only affects the seawater, and everything else is not, which is also an 'anomaly'."

Ultraman Ace replied in his consciousness.

"When you take a little rest and then transform into me, I should be able to feel more by then."

Although due to the different planets and Ace's physical strength, Ace can transform into Ultraman several times in a day, but if there are too many times in a short period of time, it will also cause damage to his health.

So, Ace and Luffy sat down and rested in place.

“…… It's so quiet, and there are no ships on the sea, so it's a world away from the new world. ”

"Maybe it's because there have been fewer people going to sea lately."

Strictly speaking, Upside Down Mountain is a complete "barren mountain", not only is there no one to live in, but there is simply no grass.

Except for the bare laterite continent, there is only seawater, seawater, and seawater.

Perhaps this is one of the reasons why the navy does not set up a card at the entrance of Upside Down Mountain to intercept pirates, and it can't even grow fruits and vegetables, let alone build a base.

"But it has nothing to do with us, and there doesn't seem to be a way to train here......"

"If these currents weren't seawater, we could use the waterfall training conducted by Severn and Leo......"

Ace looked at the rushing current, but thought to himself that it was a pity that special training could not be carried out here.

There is no grass here, no strong wildlife, and no navy stationed.

As for relying on the pirates from all over the world who want to enter the great voyage...... To be honest, Ace and Luffy don't look down on them anymore.

Moreover, due to the impact of the Marin Vando War, there are no new pirates who dare to come forward now, and the world is unexpectedly peaceful.

“…… Hey, Ace, it's so boring to just sit like that. ”

"This is also a kind of cultivation, Mr. Ultraman can live for tens of thousands of years, and he is all cultivated in this way."

Ace said nonsense, anyway, Ultraman Ace didn't do anything to refute his mouth, just looked at them with the loving eyes of the incomprehensible bear child.

Then give these two children a wave of practice.

After resting, Ace directly transformed, flying towards the top of the mountain along the upside-down sea water that was flowing against the current.

"How's it going, Mr. Ultraman? Did you find anything? ”

"From the outside, the gravitational pull is normal outside of the current, but when I fly over the current, I can clearly feel the abnormality of the gravitational pull."

"It seems that I was wrong to think that the gravitational anomaly only works on 'water', to be precise, these waterways are not right."

"When you're sailing along the waterway, your nerves are supposed to be highly tense, so your body naturally ignores these anomalies."

"Is that so......"

In the world of consciousness, Ace and Ultraman Ace discuss the problem of the gravity anomaly of the Upside-Down Mountain. After re-transforming with full physical strength, he was sure to discover some problems that he didn't notice by Ultraman Ace.

"You're saying there's something wrong with those waterways? Could it be that someone deliberately allowed those waterways to flow backwards? ”

"After all, next to these waterways, there are traces of artificially built steps."

"Not really, those stairs didn't take long to build, at least after the anomalous gravity happened."

Ultraman Ace denied Ace's speculation, and from the chronological analysis, this anomaly should have been maintained here for a long time.

"You see, there are no plants growing in the nearby mountains, not even mosses and lichens, and this land seems to be 'dead'."

"Is the land 'dead'?"

Ace was a little shocked, he had never heard of such a thing as a land death.

To Ace, this sounds like nonsense like "killing air" and "killing water".

"That's all I can find on the surface, and I'm going to investigate beneath the surface."

"Good!"

Ultraman Ace flies very fast, flying over several waterways in a short period of time, and also senses anomalies in these tracks.

If you want to continue your investigation, you'll need to go underground.

"Ott Drilling!"

Ultra Drill is a skill used by Ultraman Ace in underground combat, which sinks the entire Ultraman underground through its own rotation, and the speed can reach up to Mach 4.

When he was still on Earth, he used this trick to infiltrate the bottom of Lunatix's location and engage in battle.

Ace hovered above the confluence of four, or the five waterways that led to the Great Passage, his hands clenched into fists, crossed in front of his chest.

Immediately afterward, his whole body spun in place, like a drill, and landed straight down.

"Bang!!"

Ultraman's huge body was submerged in the turbulence formed by the impact of multiple streams of water, and a huge splash sounded as it sounded.

And in the next second, Ultraman Ace suddenly noticed an anomaly underwater.

At the top of the upside-down mountain, where the water meets, there is a hole in the water of the turbulent whirlpool!

The water above was turbulent, and the water from all four directions was filled, splashing large white splashes that obscured the water surface.

In addition, the deeper the water, the dimmer the light, so although countless pirates have flown over the Upside Down Mountain by boat over the years, no one has found that there is a platform at a depth of about 100 meters above the water.

A platform made of metal with obvious traces of artificiality!

After seeing the platform, Ultraman Ace, who was going to drill all the way down, stopped spinning and went to the edge of the platform to investigate.

"Ace, have you ever heard of such a thing beneath the upside-down mountain current?"

"No, I haven't heard of ...... at all."

Ultraman Ace nodded when he heard this, and continued to investigate the platform.

It's not so much a platform, but a disc or cylinder formed by multiple metal rings nested and superimposed, and due to the passage of time, a layer of silt has accumulated on it, and it needs to be manually wiped off by Ultraman Ace.

"There is no such thing as words, but the level of technology should not be low, and compared with the level of science and technology in this world, it is about 500 years ahead......

"However, the manufacturing time of this metal platform is probably close to 800 years, and it is not a product of this era."

"Eight hundred years? Could it be ......?"

After hearing Ultraman Ace's words, Ace suddenly remembered what he had heard before, and the hundred years that had been concealed by the World Government eight hundred years ago.

It is said that all the history of those 100 years was hidden by the world government, and things such as books, murals, and legends were not preserved at all, and only the huge stone called the "historical text" was preserved because it could not be destroyed.

But the World Government doesn't intend to let go of these things, and just a few years ago, they wiped out O'Hara, the largest library in the West Sea, and possibly the largest library in the world, with a demon slaying order.

In that massacre, which can hardly be called war, archaeologists and historians were killed and wounded, and countless civilians disappeared from the world.

From this point of view alone, it can be seen how much the world government fears and abhors the text of history, and how disgusted it is for a hundred years to disappear.

Could this be something from that period? What secrets are being hidden by the world government?

"That period? This possibility cannot be ruled out, but it is not completely certain. ”

"There is such a thing as coincidence in the world. But if the number of coincidences is large enough, this also forms a certain inevitability. ”

Ace wasn't sure in his heart yet, but if there were more clues and evidence that the anomaly of this planet was related to the "disappearing hundred years" eight hundred years ago, I'm afraid he would have to go to the World Government to talk about it.

The government almost destroyed its own planet for a certain purpose, and Ace and the other Ultra brothers have seen a lot.

When the time comes, it's time to "open the door, Otecha water meter!" "That's it.

Well? Water meter?

Ultraman Ace suddenly had an idea, stood up straight, and emitted a blue ray of light from the Ultra Star on his forehead, the signal light under the crown, and probed towards the strange metal platform on the ground.

"Detection radar" is generally a detection ray used by Ultraman Ace to detect the condition of a certain planet, but after reducing the power, it can also be used to detect some small buildings or mechanical structures.

Now look at this large metal creature in the upside-down mountain, how does it look like a water meter, it should also be usable, right?

"This device is ......"

"Water meter? No, it's a water pump?! ”

Ultraman Ace quickly returned the information detected by the detection radar, and both Fire Fist Ace and Ultraman Ace read the information at the same time.

Limited by the level of education, Ace can only associate this conclusion, and he doesn't know if it's right or not.

"You have a point, it seems to be a pump-like device."

What Ace didn't expect was that Ultraman Ace agreed with his conjecture.

But 800 years ago, who built a pump here? What is he doing repairing pumps in this place?

"This device is not so much a 'pump' as a 'pumping device' that is capable of pumping other things."

"The pump is pumping water, and what this thing is pumping is the energy of the planet."

"What? Heavenly body...... Energy? ”

After being selected by Ultraman Ace as a human body, Ace's worldview has undergone a huge refresh, and he originally thought that he would not be shocked by anything anymore.

But today, what Ultraman Ace said still made Ace show a rare expression of shock and gaffe.

Extracting energy from the planet? What is this concept?

Life force can be thought of as the energy source of human beings, and if life force is extracted, people will become weak, tired, aging, and even die.

Fuel is the energy source of mechanical creation, and if the fuel is exhausted, the mechanical creation will become a lump of scrap metal.

So, what if the planet's energy is extracted?

"According to the feedback given by the detection radar, the four surrounding waterways are the four dry channels formed by the planet's extracted energy."

"If you use an analogy that you can understand, it is four branches that have been completely drained of water and have become so dry that no amount of water can be added to them."

"Within these four channels, the planet's energy has irreversibly disappeared, hence the gravitational anomaly."

"Mr. Ultraman, let's destroy this thing quickly!!"

"Don't worry, Ace. This device, while capable of extracting energy from the planet, has now ceased to function, and should at least ......"

Ultraman Ace estimated.

"At least seven hundred years ago, it stopped working and has been in a state of abandonment."

"Seven hundred years? Isn't that the end of the '100 years of vanishing'? ”

Ace was a little puzzled when he heard this, how did this sound, it seemed that the world government had stopped this device for extracting planetary energy and turned it into a great savior to save the world.

"It's hard to say now, there are too few clues."

"However, based on the feedback from the detection radar, this device may lead directly to the other side of the planet."