【Thousands ♂ of ÷ small → said ◇ .], wonderful free reading without pop-ups!

After glancing at the hellish scene behind him, the surviving Shinobi immediately realized the truth that real men never look back at the explosion, and used their strength to bury their heads in the front.

But even so, the ninja dragon who was in hot pursuit continued to eat away at the sand ninja at the back of the team, looking like it was going to devour them all!

And in the sky 100 meters above the head of the blade dragon, the rope tree was running with the moon step and stepping on the heat wave, while holding the seal of Yin in both hands, using the hole investigation ability of the writing wheel eye to cooperate with the ninjutsu under him.

Ninja Blade Mountain Fire Sea is not a ninjutsu deliberately developed by Rope Tree, but an unexpected result obtained when practicing another ninjutsu.

Ever since he began to practice the Flying Thunder God, Rope Tree has never forgotten the Infernal Technique of his brain, so he has been practicing the throwing technique hard all these years, hoping to reach the highest level of using the Kunai to change direction and form a "sword formation" around his body.

Especially when he successfully redeemed the Sharingan, which could easily capture Kunai's flight trajectory with his insight ability, he thought that his idea was about to succeed.

However, when he excitedly opened his eyes and made countless attempts, he found that no matter how hard he tried, he could not let the restraint of gravity and resistance form a "sword array" in the air.

After many failures, Rope Tree finally stopped the meaningless attempt and began to think calmly about the reason, he found that with the assistance of the Insight Eye, his throwing skills had reached the peak, not to mention the collision trajectory of dozens of kunai, even if it was thousands of currents, there was nowhere to hide under these eyes!

So the fundamental reason why the Infernal Array can't be completed is not technology, but lack of ability!

According to the law of conservation of energy, the kinetic energy of flying objects will be exhausted under the action of gravity and friction, so if you want to form a "sword formation" of kunai, you must constantly increase kinetic energy, and the only way to do this with throwing is to keep throwing new kunai, but in this way, the base of kunai will also increase, and the required kinetic energy will increase accordingly. And the explosive power and throwing frequency of the rope tree himself also have an upper limit, and it is impossible to increase indefinitely, so after a long time, the so-called sword formation will collapse due to insufficient kinetic energy.

After figuring out this simple physics problem, Rope Tree knew that it was completely impossible to complete the "Sword Formation" by throwing alone!

So he began to make various attempts and changes, such as using the Wind Escape Chakra to reduce the resistance of the kunai when flying, and even changing the kunai to a boomerang to be released repeatedly, but the effect was not very good, and it was never successful.

In the end, he hit the idea on the ninja itself, since he couldn't provide kunai with enough kinetic energy, then he could only find a way to make the ninja itself generate kinetic energy.

When it comes to energy and ninja tools, he easily thinks of the frequently used detonation charm in the original book, which is the only "thermal weapon" in the ninja world.

At first, Rope Tree simply tied the detonation charm to the kunai and experimented, but later found that the impact of the explosion could indeed provide kinetic energy for the kunai, but it was not as easy to manipulate as the throwing technique, and the explosion was not durable.

So he improved the ninja equipment, using the explosive knife droplet, one of the famous seven ninja knives of the flying mist as a template, and exchanged the wish power system for a kunai with a special shape!

The kunai's handle and middle ridge are made up of a pocket scroll with an initiating charm attached, and once the detonator explodes, it can provide a huge amount of kinetic energy to the kunai, causing the kunai to fly in a spiral like a bullet in the air!

Since the metal that makes up the kunai is exchanged for a blaster and droplet, it will not be damaged or deformed under the impact of a violent explosion, and it is a small aircraft with a detonator as the engine, and the explosion power of the detonator is not limited in any way.

This ingenious special design is difficult and expensive to build by manpower, so the rope tree initially chose to exchange it directly with Wish Power, which requires 150 Wish Power per stem depending on the quality of the kunai.

In order to allow this trait kunai to obtain a steady stream of flight power through explosions, Rope Tree specially found the second generation of secret techniques from the Book of Seals!

This technique is an infinite blasting ninjutsu developed by the second generation Hokage: a single detonation charm is quietly pasted on the enemy's vital point, and then takes the opportunity to detonate it to the opponent's surprise. A single Detonation Charm can be infinitely continuous to channel the Detonator Charm to concentrate on one point of infinite continuous explosion, as long as it is possessed by a Detonation Charm, it cannot be escaped. The Detonator will then summon a Detonation Charm, which can cause an infinite burst of explosions!

With this technique, kunai is equivalent to installing a perpetual motion machine that never stops.

After making dozens of special kunai, the rope tree relied on the Thunder Escape Chakra Mode and the Flying Thunder God Technique, and after many experiments and exercises, he finally completed the so-called Kunai "Sword Array" by relying on the insight ability of the writing wheel eye and the control of the explosion frequency of the multiplication detonation charm.

But in this way, the infernal technique of cooperating with the Flying Thunder God will also be a complete failure, if surrounded by this "sword array" full of explosions and flying blades, the enemy will be like being in the hell of the sword mountain and the sea of fire, why do you need the cooperation of the Flying Thunder God?

However, the rope tree accidentally obtained a powerful ninjutsu because of this.

However, relying on dozens of swords, the mountain of fire and the sea of fire that are used by the characteristics of kunai are too small, and if you want to encompass the scale of the "sword array", you need more special kunai.

This kind of Turly Bitter Wishing Power costs 150 points per sword!

The detailed drawings provided by the rope tree are asked to be made by the ninja master, and the cost of each handle needs 100,000 taels! And the process is very slow, and it takes each master ten days to make one! Even if the method of using the flow of water is proposed by the rope tree, and the power of all the ninja craftsmen under the Konoha Foundation is concentrated, only ten handles can be made in a day!

Even with the financial resources of the rope tree, he can't sprinkle forbearance tools out like Xiao Nan and Tian Tian, two female tyrants.

Therefore, the rope tree, which is not financially adequate, has come up with a cost-saving trick, which is to use 10,000 special kunai as the power core of a perpetual motion machine, plus tens of millions of ordinary ninja tied to the detonation charm, imitating the principle of the dragon ascension technique of the heavens, and channeling the million ninja tools out of the dragon with a scroll at one time in the air!

In this way, the initial kinetic energy of the blade falling from the sky and the explosive power of tens of millions of detonation charms were propelled by the kunai, a huge dragon-shaped "sword array" that could move at high speed.

This is the large-scale ninjutsu that the rope tree is now used to sneak attack the sand ninja - Ninja Tools: Sword Mountain and Sea of Fire!