My sister is the daughter of destiny

Tianxu battlefield, Qian army camp.

Warships were docked outside the military camp, and practitioners in armor were constantly walking out of the warships and entering the military camp.

Every month, each major military camp would organize a local war. The regular army would go into battle in batches, and at the same time, practitioners from their respective domains would come to the battlefield and participate in the war as temporary troops.

Fighting is the best way for practitioners to improve their cultivation.

You can also kill aliens to gain military merits and exchange them for treasures from the Tianlan Treasury. Moreover, some special materials on many aliens are usually used for refining equipment, arranging large formations, etc., and are also very valuable.

Last but not least.

Where is the Tianxu battlefield?

Once the core of the entire Tianlan world, Tianshangtian!

The place where the capital of the Qin Dynasty was located was so prosperous that it was hard for the world to imagine.

Due to the invasion of foreign races, Tianshangtian fell and became the current Tianxu, but it is undeniable that this was once the richest place in the entire Tianlan Realm, with countless secret realms and opportunities.

Although the spiritual energy is seriously polluted, many skills and inheritances of spiritual techniques are not afraid of pollution, and not all secret realms will be polluted. Some secret realms are still closed and isolated from the world.

Once a practitioner encounters such an opportunity in a secret realm, he will surely soar to the sky.

Therefore, the Tianxu battlefield is actually the best place for low-level practitioners to turn things around and counterattack.

"Everyone, go to the Quartermaster's Office to collect your identity tokens. Take a day off today and get enough rest. We will set out tomorrow!"

Lu Ningfeng stood at the bow of the Lu family's main ship. The three hundred Lu family geniuses were all wearing the same style of armor, neatly arranged on the deck.

There are three hundred geniuses, one main ship carries one hundred people, and the remaining two hundred people are divided into twenty teams, each with ten people.

Xiaoxue, her eldest cousin and Nangong Xingyue stood aside, waiting for arrangements on their side.

Every member of the temporary army must go to the quartermaster's office and obtain a special identity token, which can record military exploits and also serves as a quota to enter the battlefield. The military alliance will count this data.

In the past, when Lu Ningfeng and Xiaoxue fought in the Tianxu battlefield, they used anonymous identities. Their actions would still be recorded, but would not be counted as military achievements.

The Lu family members got off the warship and entered the military camp.

In every local war, big families like the Lu and Su families would have members participating in the war. This has become a routine, so the appearance of Lu family members in the military camp would not attract special attention.

After all, except for a few people, ordinary people don’t know that the number one genius of this genius event has arrived at the military camp.

After recording their identities at the Quartermaster's Office and receiving their jade identity tags, everyone returned to their respective battleship rooms to regulate their breathing, preparing to face tomorrow's battle in the best possible manner.

Ning Baichi and Nangong Xingyue came to the outside of the military camp excitedly and began to prepare to study the chaotic spiritual energy first.

The entire military camp was shrouded in a huge formation. Walking out of the camp was like stepping onto the territory of Tianxu battlefield.

Although the degree of chaos in the spiritual energy becomes lower the further away it is from the periphery, it has not been purified after all and still has chaotic characteristics.

"how?"

Lu Ningfeng and the other man looked at Ning Baichi and the other man curiously as they set up mini formations and began to collect and test the chaotic spiritual energy.

Ning Baichi was responsible for collecting and observing, while Nangong Xingyue was holding a book and taking notes.

"No, this is the outermost part of the battlefield. The chaotic spiritual energy is too thin and its effect on the spiritual formation is not obvious. We need to increase the concentration of chaotic spiritual energy step by step to conduct tests."

After Ning Baichi collected the data, he began to try to debug each formation.

Adjusting the spiritual formation is the basic skill of a formation master. After all, arranging a large formation is not something that can be done by simply carving the formation patterns and placing the materials according to the requirements of the formation. In that case, the formation must be carved on a jade formation plate.

When actually setting up the formation, one needs to consider issues such as the orientation, location, concentration of spiritual energy in the location, etc., and the formation needs to be adjusted according to different environmental conditions.

However, due to its material, jade array plates are usually unable to withstand too many combined spiritual arrays.

Nangong Xingyue set up a number of formation plates, which was her research.

Lu Ningfeng once said that he would give her a project, a project named after her, which was to solve the problem of the long energy storage time of the 100-foot heavy artillery.

Although the 1.1 version of the Hundred-foot Heavy Cannon has an advanced spirit gathering array, it still requires a period of time to gather spiritual energy and charge it, and it can only be fired once, which is a big disadvantage.

If this problem cannot be solved, it is conceivable that the 100-foot heavy artillery will inevitably become a gold-devouring monster in the future. If it is really put into use on a large scale, it is likely to drag down the military alliance.

This will undoubtedly create some resistance to the promotion of 100-foot heavy artillery.

Judging from her current appearance, she has obviously already started her research.

"Huh? What is that?"

Xiaoxue took Lu Ningfeng's hand and suddenly pulled it hard, attracting his attention.

Lu Ningfeng followed her gaze and saw teams of soldiers wearing special white armor flying out of the military camp.

The white-armored warriors formed groups of three and quickly expanded horizontally after leaving the military camp. Each group was ten miles apart, and it was unknown how far they spread out.

Then the entire formation flew towards the depths of the Tianxu battlefield and did not stop until it was about ten miles away from the military camp.

Lu Ningfeng and the other man kept their attention on these people. They saw their figures suspended in mid-air. One person in each group took out a huge and strange-shaped device from a storage ring.

It seemed to be a chariot with a square main body, which was more than three meters long, wide and high, but it had no wheels or beasts pulling it.

The front of the car doesn't look like a normal one. Instead, it has a huge horn that is almost as big as half the size of the car. It is silver-white in color, and the only thing that stands out is its blinding ugliness.

The three white-armored warriors each had their own division of labor. One of them sat cross-legged on top of the carriage, transferring spiritual power to "start" the entire vehicle.

The second person is sitting in the "driver's seat", and it seems that he is controlling the direction of the car. This is the only place that looks the same as an ordinary chariot.

The third person was sitting on the huge loudspeaker, and it seemed that he was responsible for controlling the loudspeaker.

"What is this?" Lu Ningfeng was also a little confused. For the first time, he felt that he was ignorant. He had been to the battlefield several times, but had never seen such a thing.

"Oh, that's the purification unit trained by the military alliance. Before and after each battle, they control the purification vehicles to purify the chaotic spiritual energy in the Tianxu battlefield to reduce pollution. Otherwise, the spiritual energy pollution would have spread to other domains long ago."

Ning Baichi looked up, then continued to fiddle with his formation with his head down, showing little interest.

Lu Ningfeng nodded thoughtfully. After all, his cousin was an old man in his thirties. He had occasionally been thrown into the battlefield by his uncle and his uncles before, so he had seen the world.

Suddenly, the huge horn of the silver-white purification vehicle burst into a burst of spiritual light, and then Lu Ningfeng keenly noticed that the chaotic spiritual energy around the purification vehicle began to pour into the big horn.

The speed was very fast. Even though Lu Ningfeng was at the edge of the military camp ten miles away from the purification vehicle, he could sense that the concentration of chaotic spiritual energy around him began to drop rapidly.

"The effect is so obvious?" Lu Ningfeng looked surprised.

Xiaoxue even opened her visor and felt it for herself. The concentration of the chaotic spiritual energy around her had basically dropped to an imperceptible level.

She looked at the huge compartment of the purification vehicle with some curiosity, wondering what good things were hidden inside that could make the purification effect so good.

"Is that carriage used to purify the chaotic spiritual energy sucked in and then send it back to other realms?"

Lu Ningxue asked curiously.

"What are you thinking? If the amount is smaller, like the concentration of spiritual energy in the lower world, it can be purified by manual decomposition. But in a place like the Tianlan Realm, the spiritual energy is too dense. If we really rely on humans to purify it, wouldn't it be exhausting?"

The concentration of chaotic spiritual energy decreased, which disturbed Ning Baichi and Nangong Xingyue's research. They could only stop the test temporarily and turn to answer Xiaoxue's doubts.

"The purification vehicle essentially extracts the chaotic spiritual energy together, and then someone will take it outside the domain and discard it."

"Throw it away?" Lu Ningfeng and Xiaoxue looked at each other, somewhat confused, but also surprised, "Wouldn't that be a waste of the spiritual energy of heaven and earth?"

"The Tianlan Realm is not short of spiritual energy. Don't underestimate the speed at which a large realm produces spiritual energy. The Tianlan Realm absorbs the free chaotic energy in the extraterritorial space through its boundary wall and converts it into spiritual energy to nourish itself. The chaotic spiritual energy we throw out will essentially be absorbed by the boundary wall of the Tianlan Realm and converted into pure spiritual energy."

Ning Baichi patiently explained to the two illiterate people, and Nangong Xingyue nodded repeatedly beside him, obviously she had learned it too.

"Just tell me to read more books. Look, you've become illiterate, right?"

Ning Baichi and the girl with twin ponytails exchanged a glance and could feel each other's gaze even through the visor of their armor.

Lu Ningfeng's face was filled with black lines. He felt that the two of them should be talking about a book on weapon refining, otherwise there was no reason for him not to know such a thing.