The world of Naruto is endlessly mysterious.

Death, hidden in the depths of the earth. This world is strangely different from the cosmic world as Naruto understood it, and from the outside, the whole world takes on the form of a sphere, but you can't tell if it's a spherical planet or not.

In other words, it has the oceanic characteristics of a spherical planet, and the sailing phenomenon can be seen. But the earth is indeed flat and neat, which is very strange.

According to Naruto's guess, as long as they dive straight down the ground and reach the depth of half a small thousand worlds, they can reach the legendary Death Realm, the Reincarnation Pure Land.

Pure Land, this is a saying in the Hokage world, legend has it that the Grim Reaper appeared in the human world, and it was the Pure Land that was summoned to the human world to evolve.

The Hokage world is also a world of cultivation, and he has an existence like the god of the moon, Kaguya Otsuki, so even if this world takes the appearance of a sphere, it is very different from the earth in the previous life.

Descending deep into the dirt, about a thousand kilometers had passed, and Naruto and the others had reached the near-center end of the outermost crust.

At this moment, Naruto looked in shock at a rock formation behind him, and in front of him was the asthenosphere deep in the earth. The temperature of the asthenosphere was much higher than that of the ground, and if it weren't for the Chaos Fire, they wouldn't have been able to withstand the temperature of that situation.

However, these are no longer his concerns, what he cares about is that the entire Hokage Continent should not have such a deep crust, even if it was the earth in the previous life, its crustal area was only a few tens of kilometers.

"It turns out that the depths of the earth are like this, it's really unimaginable" Tsunade looked at the world in front of her in amazement, the whole person fell into a stupor, as one of the most powerful natives in the Hokage world, she had never understood such an underground world before.

The upper mantle meets the earth's crust and is an important area for magma production, where the temperature is already beyond the capacity of ordinary people.

Tsunade watched the scorching aura, and although she knew that with the existence of Chaos Fire, she couldn't be burned by this violent temperature, but in general, there was still a natural fear in her heart.

Invisibly, the aura in the body is mobilized more and more, making the Chaos Fire thicker.

"I didn't expect that we would be deceived by this world, and this world should not be so big. Otherwise, I wouldn't have such a thick crust," Naruto sighed, making Tsunade next to him feel weird.

Because, among the things that Naruto teleported, although the things related to the entire cultivation system were included, he did not transmit certain things to them together.

Tsunade blushed slightly, and asked shyly, "Naruto, what is the earth's crust, why does this kind of thing make you wonder?" ”

Naruto turned to look into Tsunade's eyes and said in a serious tone, "Tsunade, you don't know, the movement of the earth's crust is something that a planet must have. "In the world of Naruto, technology and ninjas coexist, and many things on the earth, humans have long understood almost everything.

Naruto summed up the situation for him for this. "I think that the world we live in is a sphere, beyond which is a dark starry sky, and from the earth straight down, the whole surface of the sphere to the center, has different layers of matter. I divide those layers of matter into the crust, the mantle, the core, and the core. On an ordinary planet, his crust is only a few tens of kilometers, but when we just shuttled in, the earth's crust was actually more than 1,000 kilometers thick. ”

……

"I can't imagine what a huge world this is, the big beauty with steel hands, do you think that the world we can see now is not at all like a real world, perhaps, we can only see a part of him" Naruto pondered, his eyes imagining the depths of the earth, and suddenly, a great interest rose in his heart.

"This ...... I don't know that much, but, Naruto, I'm following you, and if I really tell you, then our understanding of this world is too narrow."

"It's ridiculous, among the Konoha ninjas, among the major ninja villages, they are still complacent about their little bit of strength" Tsunade shook his head, slowly moving her body, wrapped in gray and white flames, her body was like a wick, and those scorching flames felt the breath of gray and white flames, not only was they not in an advantageous position, but they were also slowly absorbed by the gray flames.

The deeper they dived, the more severe the scorching aura became, the more they aroused their curiosity.

At their feet, each of them was carrying a sharp sword, shuttling between the hot molten matter at an extreme speed. For the Earth, molten matter occupies only one to ten percent of the upper mantle. And here, the degree of distribution of the entire molten substance has reached more than 20 percent.

Naruto tentatively released his perception, and within the entire space, his perception could only reach ten million square miles, and it was blocked by a bright white light.

And, as he went deeper, the influence of the white light deepened and deepened, until at last, he felt a little drowsy as if he were drunk.

"Shhh...... How scary? Drops of blood began to ooze from the corners of Naruto's eyes, running down the sides of the bridge of his nose, and Tsunade was anxious.

"Naruto, what's wrong with you, don't you scare me?" Tsunade's voice trembled slightly, he didn't know what Naruto had done. Seeing Naruto's bloodshot eyes, one hand tugged at the corner of Naruto's clothes.

Naruto took a deep breath, excited by Tsunade's words, reached out and wiped the wetness from the corners of his eyes, and then looked intently, "Great beauty, thanks to you, if it weren't for you, I might have fallen into a hallucination just now." The power of the illusion is something I can't resist."

At the same time, Naruto began to wonder what the white light in the depths of the earth was, and besides, it had actually invaded the lower mantle.

"Is death in that kind of place, then, what is there there, heaven or hell?"

"Hey, hey, hey...... That's what's interesting, little bare of death, no matter what kind of ghost you are, Uncle Ben will catch your little tail" Naruto began to laugh evilly, making Tsunade inexplicably wonderful, for a long time, looking at Tsunade's wide eyes, then he put away his smile and said: "Let's go, Tsunade, let's go and see, where is Death?" Attention, don't use your perception to go deep into the center of the mantle, I felt something dangerous just now, we have to get closer little by little, you follow me closely, don't get lost, I don't know what kind of danger is hidden here"

"Okay, don't worry" Tsunade smiled sweetly, taking the initiative to go deep into the jade hand and intersect with Naruto's fingers.

Naruto smiled, turned around, and took Tsunade with him into the depths of the mantle, and after they left, a hotter molten substance formed in the place where they had been, making the area restless.

However, these things, Naruto and they can't pay attention to.

What they didn't know was that the distant ground, for some unknown reason, had begun to shake. In the southern border of the Fire Country, in the middle of the vast sea, a huge whirlpool is forming, and within ten miles, the overwhelming sea water will fall into the bottomless pit whirlpool.

The fishermen who had just landed looked at the huge whirlpool in front of them, their mouths wide open, and their eyes full of disbelief.

"Quick, Jianmu, run, there are ghosts in this place, if you don't leave, you will be eaten in a while"

"Daddy...... It's horrible, it's just ...... It's the mouth of the Grim Reaper, his huge round mouth, almost swallowing the entire coast."

People began to flee into the interior of the continent, and in their eyes, there was probably no other explanation for such a situation except for miracles.

They didn't even take the boats with them, and could only watch as a dozen large ships were completely swallowed up by the sea. Behind them, a tall ninja suddenly appeared on the shoreline, looking at the top and frowning slightly, thinking about something.