The exchange of immortals and the experience after the breakthrough can only temporarily affect the exploration and development of the lake.

When all was over, the Uchiha continued to search deep into the lake.

Fortunately, when Uchiha Yu broke through, the natural energy of the wind genus broke out in a commotion, and half of the lake was affected, and the source of natural energy they were looking for was within this range.

Following the position he felt on the day of the breakthrough, Uchiha Yu easily found the source of his natural energy, which was a new crack hidden under the layers of falling rocks.

Judging by the surrounding terrain, the crack was formed during a landslide.

When the opposite mountain peak smashed down and hit the bottom of the valley violently, a huge vibration was transmitted from all sides of the impact point, forming a focus at the corner of the valley, and tearing a crack in the thick rock formation.

The Uchiha also found that the peaks on the left and right sides of the valley were sedimentary rocks, but there was a large amount of limestone near the fissure, indicating that the fissure was very deep and penetrated into another rock formation.

Moreover, the fissure is also a fountain of living water, and the spring water rich in natural energy flows outward, bringing natural energy to the entire lake.

Uchiha Yu collects a little spring water and takes it to the shore to study with Miwa Masayo, and they both smell a faint fishy smell, proving that there is a lot of life at the source of the spring.

Uchiha said calmly: "It should be connected to an underground river, and there are many animals in this underground river, so it is impossible to judge the specific source of natural energy for the time being." ”

"Unless we widen the rift and then drill in and dig deeper."

Miwa Masayo's head shook like a rattle: "No, absolutely not, Yo, that's it!" ”

Uchiha Yu didn't insist this time, but nodded in agreement.

Underground river exploration is too dangerous, even if he solves the problem of underwater breathing, there is no way to solve the problem of getting lost, which is a very deadly danger.

At the same time, unlike normal rivers, the oxygen content in the river water is not stable, and even if you master underwater breathing, you cannot guarantee safety.

Many underground rivers flow for a distance in the rock formations, and because the rock formations absorb oxygen, a certain section of the water body becomes oxygen-free water.

Entering such waters, in addition to the local, specialized, low-consumption populations, even fish can be suffocated alive.

Uchiha said, "If you can't explore deeply, there will be a hidden danger after all, and the creatures of the underground river may enter the lake, which may bring danger to us and the ninja cats." ”

Miwa Masashi frowned and said, "That's the source of natural energy, it definitely can't be blocked, but it can be plugged into a very small hole, at least it can prevent the invasion of large creatures." ”

"Great idea! Plug most of the cracks, then set up multiple layers of traps in a centralized manner, using traps with no entry and exit to block and capture possible underground river creatures. ”

"This will not only prevent the invasion of underground species, but also obtain some information about underground rivers by studying the animals that are caught."

Now that the most important source of natural energy has been figured out and the follow-up work plan has been decided, the rest of the work can be handed over to Cat Castle.

Uchiha Yuu and Miwa Masashi continued to concentrate on communication and cultivation while monitoring the changes in the cracks and lakes.

Even after the exchange of breakthroughs, the communication between the two psychic contractors is still very important.

They were all immortals, but they took different immortal paths.

Uchiha Yu relied on the setting of the novels of his previous life, the theory of Taoist philosophy, the chakra theory of the ninja world, and his own cranky thoughts, and after blending them together, he relied on absolute luck to come out of a path.

After the epiphany, he has clearly abandoned the system of cultivating novels, and deduced his own cultivation methods in the foundation building period, but there are still countless problems to try and solve in the specific practice, and he has been communicating with Taoist companions to stimulate his own inspiration.

Miwa Masashi has been with the Uchiha for three years, and unconsciously accepted Taoist philosophical thoughts, coupled with the immortal situation of the three holy places of hearsay, he has his own unique understanding of the immortal way.

It was with the thought of the immortal path in his heart that when the Uchiha Yuzuki was able to feel the natural energy riot, Miwa Masashi took the opportunity to become the first cat immortal.

The immortal paths of the two immortals are both based on the five points of natural energy, and both start from the natural energy of the fire genus, and the starting point is very similar to each other.

But their understanding of the Immortal Dao is not consistent.

Uchiha Yu is based on pure natural energy and compatible with the chakra ninjutsu system, embarking on the path of pursuing the perfection of the five elements. Powerful and complex powers, restless and balanced mind, allow him to purify the Uchiha family's bloodline, tap into the potential of the bloodline, and derive incredible supernatural powers.

The three rounds of Yashi combine the natural energy of the fire genus with the fire escape chakra to generate the fire immortal chakra. Perhaps because it is too pure and rejects the natural energy of other attributes, the tanuki cat embarked on the path of pursuing purity and digging deep into the rules of the fire system.

As the pioneers of their respective paths, the two of them are completely unable to refer to the traditional ninja immortals, so they rely on each other very much, and need each other's progress to verify whether their own path is correct.

The Uchiha Yu's epiphany at the breakthrough and the decisive result of the performance is supreme good news for Miwa Masashi, who needs to refer to the knowledge of the shovel officer to correct her own direction.

Discussion and argument are the main activities they get along.

On the morning of the fourth day of waiting for the cat, one person and one cat were arguing about the use of fire natural energy, and when they were fighting for the red face, they suddenly let out a sound of surprise at the same time.

Miwa Masashi asked suspiciously, "Is it a ninja?" ”

Uchiha Yu confirmed: "That's right, it's a ninja, and there are no less than four of them." ”

Uchiha Yu quickly frowned and said, "The four of them are full of murderous energy, and the one who came is not good." The old rule, I'm in the way, and you go to the periphery. ”

The tanuki nodded, and cast a flame jump with his hand, burrowing into the flames and disappearing.

Uchiha Yu waved his hand and set off a gust of wind that erased the traces left on the ground by her companion and also blew away the smell she left in the air.

Confirming that the smell had completely dissipated, he began to pretend to pack his bags, pretending to be leaving.

A few minutes later, three ninjas appeared from the slopes on either side of the valley and the river to the south, and they faintly surrounded Uchiha Yuu.

Uchiha reacted immediately, dropping his bag and drawing his straight sword to guard it.

The Sand Hidden Ninja, who was climbing quickly along the dam, was the fastest, and he quickly approached and stopped at the edge of the shuriken range.

After carefully observing the appearance of Uchiha Yuu, he shouted and asked, "Konoha Ninja, what are you doing here?" ”

According to the rules of the encounter between ninjas, Uchiha Yu responded in the strongest tone: "I am a Konoha ninja, this is the country of Kawanoku, Sand Hidden Ninja, according to the rules, you are not qualified to ask for my information." ”

The Sand Hidden Ninja on the hillside on the left made a quick descent down the mountain, also approaching the edge of the shuriken's range to a halt.

He shouted and mocked, "By the rules? Konoha underground ninja is really naïve, you must know that all the rules are a manifestation of strength, and now that we have three companions, you are not qualified to refuse our inquiry. ”

"Otherwise, we'll have to take you down with our hands and then interrogate you slowly."

Uchiha Yuhaku opened the starting form of the battle and said in a cold voice, "You can try." ”