With a radius of about twenty or thirty centimeters, pitch-black balls with a metallic texture whistled through the air, sending a sharp and piercing sonic boom along the way.

In less than a few tenths of a second, the ball crossed a distance of hundreds of meters, and with a thud it hit the ground of the earth-paved test field, firmly embedded in it, revealing only half of the dark black surface, glowing coldly in the sunlight.

At the same time, the fierce collision also caused countless cracks to bloom on the surface of this iron ball, and a pile of paper filled with it could be faintly seen.

Immediately afterward, as the ninjas outside the arena pinched the seal with one hand, and after a loud shout, the pitch-black ball half-buried in the ground revealed a little fire from the inside out, and instantly turned red.

Rumble!

The sound wave exploded, the air pressure rose, and the wind swept the clouds.

Hundreds of detonation talismans simultaneously detonated a powerful shock wave that swept around, carrying countless pieces of fine iron towards the vicinity, and in just one moment, all the dozens of humanoid hardwood targets standing within a radius of thirty meters were crushed and rushed away.

Two or three hundred meters away, he looked at the violent explosion caused by the detonator shell, but he didn't want the billowing white smoke to come out of the spot after the flames were shining, causing him to be unable to see the scene inside clearly for a while.

Shifting his gaze, Lei Luo narrowed his eyes slightly, and looked at a piece of hardwood fragments that had been blown up by the target point more than ten meters in front of his feet, and saw that his entire body was covered with dense charred holes, and in some places there were irregular iron fragments.

A few steps forward, picked up the hardwood board, just from the appearance analysis, Lei Luo felt that this should be the torso of the target, at this moment, due to the impact of the explosion, it was like it had been eaten by countless ants, and it was so miserable that it couldn't see the original appearance.

To a certain extent, it can still maintain a certain degree of integrity after being blown up like this, and the quality of these high-hardness targets made of new composite materials is still quite good.

"This detonation charm cannonball is powerful, how did you come up with the idea of fusing the detonation charm with iron sand?"

Orochimaru walked up to Lei Luo, also looking at the target fragment in Lei Luo's hand, and when he saw the countless small holes all over it, he couldn't help but construct a picture in his mind of a human body being blown up by this thing.

It must have been extremely sour.

"The use of high-pressure gas combined with iron sand impact to cause secondary physical damage other than explosion can undoubtedly effectively increase the attack range of the cannonball......"

Throwing away the waste in his hand, Lei Luo glanced around, saw that there were a lot of iron sand and target fragments scattered on the ground around him, estimated the distance slightly, and then said:

"Ordinary detonator bombs use shock waves shaped by high-temperature and high-pressure gases to hit damage, but the detonator shells used with artillery can make the damage range from 30 meters to about 100 meters."

"The hundreds of irregular iron pieces shot at high speed can obviously turn the target area into a death field, and under this level of attack, if the upper ninja is not prepared in advance, it will only be a dead end."

As he spoke, Lei Luo recalled the scene when the detonator cannonball had just landed on the ground, and beckoned to several ninjas guarding next to the artillery, and when they came, he opened his mouth and commanded:

"The survey team should grasp the best time for the detonation of the detonator shell as soon as possible, and strive to do it - let it explode in mid-air near the target point."

"If a cannonball hits the ground, at least a third of its power will be wasted, do you know? You have to know how far the target is and how long it will take to detonate. ”

"Follow-up, remember to sort out an operating manual."

Seeing these skilled workers and production ninjas nodding their heads one after another, Lei Luo didn't say much, and as soon as he turned his gaze, he saw Orochimaru and several people surrounding the cannon used for demonstration, pointing at this new weapon:

"There's a seal on it."

"What is this device for? Somewhat similar to a storage device. ”

"What does it store?"

"Just by outputting chakra, you can shoot a cannonball that far? How does this work? ”

Pacing to the side of the artillery, it happened that Orochimaru and Uryuhu turned their heads and looked at themselves with puzzled eyes, Lei Luo thought about it, and beckoned to the group of bureaucrats who came with him:

"Koichi Uzumaki, you're in charge of the research and development of this piece, right? Let's explain it to Orochimaru. ”

The deputy patriarch of the Uzumaki clan, who was over fifty years old and the head of the industrial park department at the time, approached when he heard this, and when he walked behind the artillery, he directly squatted down, stretched out his palm and pressed it to the breech part, which happened to stick to the bottom of the raised cylindrical shape, a pedestal engraved with dense sealing spells.

"This technique has three functions, one is to absorb and store the user's chakra, and the other is to convert these stored chakras into a specific type of C-class wind escape used for pressurization, and the third is ......."

"When the energy intensity of this high-pressure wind escape reaches a certain critical value, then the sealing technique will automatically release the valve and spew out a gas with great power, and this is how the detonator cannonball is shot."

"In addition, if the wind ninja uses the artillery, it can greatly reduce the process of extracting chakra, and there are three extraction interfaces, which can allow up to three ninjas to input chakra into the cannon at the same time."

While patiently explaining how the cannon works, Kochi Uzumaki turned the chakra in his body and concentrated it in his hand, and suddenly, through contact with the pedestal, the ghost-like sealing technique lit up with a cyan light.

Half a minute later, with a loud bang, I saw the muzzle at the top of the barrel, and the air in the area directly in front of it was distorted, and at the same time, the howling wind also rolled up the clothes of the spectators.

The artillery shuddered, and soon fell silent.

There was no explosion in the distance, and it was obvious that Koichi Uzumaki had just released an empty cannon this time, in order to show the two illiterate people, Orochimaru and Beiliuhu, the power of the Uzumaki Clan's sealing technique.

"It's a breathtaking idea."

Looking at the dimmed artillery base, Orochimaru unconsciously grinned the corners of his mouth, and praised it sincerely, and secretly thought to himself: What kind of technical difficulties need to be broken through to realize the function of the artillery.

The first is to absorb this step, which involves a certain amount of the ability to absorb chakra, the principle is similar to the gossip seal of the sealed tailed beast, and the second is to replace the manual seal with a sealing spell, directly transforming chakra into ninjutsu, and this ninjutsu must have been specially developed with artillery.

The essence of the wind is the flow of air, and even if Kochi Uzumaki didn't say what kind of development idea that C-class wind escape was, Orochimaru could guess it: it was almost completely sacrificing the cutting and sharpness of the wind, making it thick and powerful, like a typhoon.

The chakra is constantly fed in, and the stored energy is placed in the base, pressurized, pressurized, pressurized, until the wind is so violent that it can shoot the cannonballs five kilometers away......

Then the third function of the sealing technique, that is, to detect the energy intensity, release the output interface, and let the wind flow into the barrel, so as to instantly push the detonator shell forward at high speed.