Half a month later.

Root base, training room.

Whoosh ...... Bang bang bang......

The sound of sonic booms was endless, and Lei Luo moved in the vast space at top speed, his figure disappearing with blue-white electric light, and the afterimages were almost connected into a large piece.

Suddenly, more than a dozen huge shining thunderballs, about half a meter wide, formed from all directions almost simultaneously, and attacked a chakra metal dummy in the middle of the training room at high speed.

Boom Boom Boom Boom ......

Zizizi......

The thunderball hit the target in no particular order, and directly exploded violently, producing a loud and piercing roar. In an instant, a dazzling white light filled every corner of the training room.

The steel plates on the ground were scattered and scattered by this sudden burst of energy, and the steel walls engraved with the sealing technique were melted into molten iron by the high temperature condensed by the electric sparks.

As for the metal dummy standing in the middle, it had disappeared under the bombardment of more than a dozen thunderballs, and it was ploughed out of a large pit with a range of dozens of square meters and a depth of several meters.

As the last sonic boom fell, Relo broke away from his supersonic state and stood at the door of the training room to take in what he had just done.

It seems that this training room is also dead......

The entire interior area had been devastated beyond recognition, with a large area of ground in the center missing steel tiles, revealing the soil and rock formations underneath.

The surrounding walls were melted out of large holes of different depths, and some of the holes could even faintly see the scene next door, you know, there were techniques engraved on them to suppress the power of ninjutsu.

Those thunderballs that shone with blue and white light, extremely fast, and extremely powerful were the ninjutsu that Lei Luo had recently created, and they were also the first ninjutsu he had developed independently. Its name is Lei Ying, and it is an extremely destructive A-level ninjutsu.

Yes, there is only a grade A, and it is not yet up to the standard of an S grade.

With Lei Luo's existing chakra amount, he can't fully release an attacking S-rank ninjutsu.

Although he can recover by countercurrent, there is a slight pause in Chakra from being consumed to being full, and this pause will cause problems in the connection of S-level ninjutsu, and the final release will fail.

Helpless, Lei Luo could only put all his mind on strengthening the A-level ninjutsu that could be used smoothly.

He chose a Thunder Dun Ninjutsu as a template, and spent more than half a month to develop the nature change of Lei Dun, and carried out various magic changes, so Lei Ying was released.

Lei Ying, the thunder escape ninjutsu, was specially strengthened by Lei Luo to strengthen the nature of thunder's violent explosion, and added a part of the fire attribute chakra to increase the temperature generated when it exploded. In addition, he also incorporated a little time power, and at the same time increased Lei Ying's flight speed and the chakra reaction speed within it, striving to make Lei Ying burst out with full power in an instant.

Lei Luo, who strives for excellence, has really strengthened Lei Ying to the extreme of destructive power that A-level ninjutsu can achieve: strong light, current, high temperature, high pressure, shock wave, and physical inertia at the speed of sound...... Lei Ying's multiple damage was frantically stacked by Lei Luo, and the strength was barely up to the requirements, but this also caused him to use more than half of his chakra every time he released Lei Ying.

Normally, no ninja would pursue the destructive power of ninjutsu as much as Lei Luo.

First of all, the cost of ninjutsu at this level is too high, and there is basically no combat power after using it once, after all, the battle of ninjas is not a ninjutsu fight, and Lei Ying's level of skill is generally regarded as a hole card.

Secondly, excluding the bonus of the power of time, Lei Ying's own speed is not fast, and it can even be said to be extremely slow, after all, he has added all the changes in the nature of Lei to the attack power.

Where do ordinary ninjas get this kind of plug-in of the power of time, so it is worthless to develop a technique like Lei Ying that has destructive power and can't hit people.

But Lei Luo, a freak, is naturally different from ordinary ninjas, he does not lack speed, does not lack hit rate, only lacks attack power, destructive power! In terms of destructive power alone, Lei Ying is actually similar to S-level ninjutsu, after all, it sacrifices almost all other attributes.

And although the total amount of chakra is not high, Lei Luo has a countercurrent recovery. Lei Luo, who can return to Chakra dozens of times in a battle, can already throw Lei Ying as a cannon battle.

And with his supersonic movement speed, he can throw a bunch of thunderbolts in all directions of the enemy at the same time in an instant, and see if you can block or dodge.

What kind of earth wall, water wall, if there is a kind of defense, try it. More than a dozen pure attack-type A-level ninjutsu are confused, and that feeling is not a joke.

In the face of this kind of attack, Lei Luo felt that even the Konmatsu puppet of the Mozaemon would be absolutely unstoppable, didn't he see that the dummy made of chakra metal just now was gone?

Lei Luo thought to himself, after developing Lei Ying, if he encountered Mozaemon again, he would definitely be able to smash a bunch of puppets neatly and accept the other party's dog head.

Let the old boy shrink into a puppet and be a turtle with a shrunken head...... The other party completely bullied him, and the attack power was not enough at that time.

The Fire Dragon Flame Bullet was already his strongest attack technique at that time, but after all, that technique had to take into account both speed and range, and its destructive power was completely incomparable to Lei Ying.

After nearly two months of continuous study and cultivation, Lei Luo not only accumulated a lot of ninjutsu experience, but also independently developed a ninjutsu suitable for himself. At the same time, his physique has also increased slightly, and his normal movement speed has reached more than six meters per second. At three times the speed, the ultimate speed is close to 400 meters per second.

At this point, Fengxing is already a little unbearable, and the air resistance of the outside world is even as difficult to break through as viscous cement.

So Lei Luo considered whether to change his thinking, find Yun Ren's bad luck, and borrow the secret book of Lei Dun armor to read. Stimulating cells with lightning to build up the body's strength against air resistance also looks good.

There is also the in-depth development of the Flying Thunder God's art...... Even if teleportation is not used, the technique of Flying Thunder God Guiding Thunder is also of extremely high strategic value, and if it can be successfully developed and its process simplified, various secret forbidden techniques may be directly "delivered to the door".

He can sense spatial fluctuations, so the next thing to learn is all kinds of sealing techniques.

Relo was still thinking about where to go, not noticing that the door behind him had been pushed open.

Tuan Zang walked up to Lei Luo with a gloomy old face, and opened his mouth with an irrepressible roar: "This is already the third training room of this month!" If you want to test ninjutsu, can you go out and test it? ”

Lei Luo came back to his senses, and said with a slightly embarrassed face: "I thought the walls here were very strong, and there were those sealing techniques to protect it, who knew that this dilapidated house was so tormented." ”

The truth is that Lei Luo doesn't know where to find a place where he can shield the perception of detection, and after thinking about it, it is still the safest place in the root headquarters.

Taking a deep breath, Tuan Zang glanced at the wreckage of the training room like a typhoon passing through, and sighed in his heart that Lei Luo's progress speed was too terrifying. From the beginning, I just flipped through the ninjutsu scrolls, and gradually mastered a large number of BC-level ninjutsu, and then A-level ninjutsu, and S-level ninjutsu.

Up to now, Lei Luo has been able to independently develop A-level ninjutsu, and how long did it take? It's been less than two months.

Tuan Zang calculated Lei Luo's current abilities: ultra-high-speed movement, perception ability, terrifying chakra amount (illusion caused by countercurrent), a large number of ninjutsu illusions, unclear spiritual secret arts, and now there is this self-created ninjutsu with destructive power comparable to that of S-class.

From the perspective of Tuan Zang, Lei Luo has now reached the limit of a regular ninja, and his combat power is probably similar to that of the Ape Flying Sun Slash, even in the face of those blood ninjas, he should be able to beat.

It just so happens that the front line has been tight recently, and it's time to arrange a mission for Lei Luo. After two months of almost sleepless cultivation. Tuan Zang is very much looking forward to the supreme combat power of the root of the Absolute Shadow to make a move and clear all obstacles ahead for him.