In the 15th second, Renault let go.

He didn't dare not let go, because at this time the speed had exceeded 420 meters per second, and the distance from the ground was less than 200 meters, and he would hit the rock in 0.5 seconds at most. He had to hurry up and slow down.

The moment he let go, the spear of light fell from the sky and hit the giant tortoise directly.

At the same time, the "Book of Thermodynamics" turned to page 5, and the golden sphere representing the [First Law of Thermodynamics] appeared above the page, magical energy surged in, and a strong golden light shone, a certain mystery. The change appeared in the light gun.

The light on the surface of the light gun began to fade rapidly, and completely dissipated in an instant, revealing the bright red gun body, then turned dark red, and finally returned to silver white.

And every minute the gun body temperature drops, the landing speed increases by one minute. When the speargun returns to its original state, its speed suddenly increases, turning into a real thunder.

Heat becomes kinetic energy!

This is exactly [Thermal Transformation]!

In order to maximize the effect of this skill, Renault forcibly heated the temperature of the spear gun to over 2600 degrees, which was very close to the boiling point of steel.

Because the more heat, the greater the final kinetic energy and the faster the speed of the speargun.

A series of magical changes that took place on the speargun, from start to finish, only took less than 0.3 seconds.

Under the multiple effects of gravity, [Mental Power] and [Thermal Transformation], the speargun has become a spear of God's punishment!

During this time, the giant tortoise experienced the biggest ups and downs in the "tortoise life".

When Renault flew to an altitude of 5,000 meters, the giant tortoise could not see Renault. It thought that the enemy had left, so it also crawled away leisurely.

After crawling more than ten meters, it suddenly smelled a strange smell, and the smell was very rich.

There was the smell of the same kind of death inside. It was the smell of internal organs. It had spent a long time on this island. I don't know how many of the same kind had been killed in the courtship competition. I was very familiar with this kind of smell.

In addition, there is another kind of breath. The giant tortoise knows that this is the breath of a "two-legged beast". It has seen a "two-legged beast" several times in the past.

But they are stupid. They are busy picking up black stones every time, which makes the giant tortoise very confused. They don't have a carapace, so it's useless to eat them?

This kind of "two-legged beast" is weak, looks very thin, and is generally far away, and it has no interest in chasing them.

But now it’s different. Judging from the smell, these "two-legged beasts" are obviously not far away. The giant tortoise has spent a lot of effort to "drive away" the strange "two-legged beasts" that only fly, and it just feels a little bit hungry.

Although the "two-legged beasts" don't have much meat, they can cushion their stomachs anyway after eating them.

By the way, I can vent my anger. The flying "two-legged beast" is very powerful. The giant tortoise has no choice but to use its two legs to "crawl" the "two-legged" to kill as many as possible.

The giant tortoise sniffed carefully again, and after determining the location of the prey, it stepped on its four thick legs and quickly crawled towards the position of the "two-legged beast".

When Renault fell to more than 300 meters, the excited giant tortoise crawled forward nearly a hundred meters in anticipation of a good meal.

At this moment, it suddenly noticed that there seemed to be something in the sky, so it stopped and raised its head vigilantly, intending to observe it.

When the light gun appeared, the giant tortoise just looked up and saw a strange light group.

Light group?

The giant tortoise couldn't help but stunned. It was the first time in its long life to see such a weird thing, which made it a little uneasy.

When the light gun was released, the giant tortoise was shocked, and the light group actually came towards him.

It instinctively felt that something was wrong, and hurriedly began to mobilize magic energy to strengthen the carapace, and at the same time activate the gravity field to surround its body.

It has confidence in its own abilities. In the previous battle, it used the same method to block the small stones in the face of those "turtle" "small stones" that were so fast.

The giant tortoise believes it will be the same this time.

When the spear of light disappeared and turned into a thunderous black shadow, the giant tortoise was finally shocked.

Because it suddenly discovered that the gravitational field cannot shake the shadows!

how can that be?

Of course it is possible!

Can a bullet weighing more than a dozen grams be compared with a speargun weighing more than 30 kilograms?

The quality gap between the two is as high as 2000 times!

Let's calculate the energy again.

What is the kinetic energy of the bullet? According to the kinetic energy formula, which is mass multiplied by the square of speed, it is less than 35,000 joules.

What about spearguns? Its energy is mainly composed of two parts,

The first part is the kinetic energy of heat conversion.

According to the calculation of the specific heat capacity formula, how much heat is released when the temperature of steel is reduced from 2600 degrees to less than 50 degrees?

Up to 36 million joules!

[Thermal conversion] Lossless conversion is impossible. The current conversion efficiency is just close to 95%, so the converted kinetic energy is also 34 million joules.

The second part is the kinetic energy of the speargun itself.

When Renault throws the speargun, its speed is only over 400 meters per second, which is far inferior to bullets, but thanks to its high quality, its initial kinetic energy is also 6 million joules.

[Thermal transformation] After completion, the total kinetic energy of the speargun is 40 million joules, which is more than 1,000 times that of bullets!

What is the concept of 40 million joules?

On the earth, the killing kinetic energy standard of many countries is only about 80 joules. In other words, as long as it hits an unprotected part, 80 joules are enough to cause damage.

To give another example, TNT explosives on the earth can generate 4.2 million joules of energy per kilogram, and 40 million joules are equivalent to nearly 10 kilograms of TNT explosives. This is a real "explosive"-like output.

10 kilograms of TNT may not sound like a lot, but you have to know that the load of a grenade is only about 50 grams, and 10 kilograms can produce 2000 grenade.

More importantly, the 40 million joules of energy are all released in a small area in a short instant. Unlike explosive explosions, the energy is scattered around, and more than 95% of the energy is wasted.

In addition, using this reverse calculation, we can get that the speed of the speargun at this time is 1150 m/s.

In other words, after Renault played a set of [Reverse Heat Conduction] and [Thermal Transformation], the speed of the speargun surged by 700 meters per second!

Can the giant tortoise carry this spear of punishment with 40 million joules of energy?

In this world full of magical energy, any ability has its limit. Renault’s [Nan Momentum] is the same as that of the giant tortoise’s gravity control. Its gravity can move bullets, but it absolutely can’t move spearguns.

Therefore, the giant tortoise can only look at the speargun in horror, seeing the gravity field as nothing, hitting the tortoise shell indefinitely.

Oh, no, because of the angle, it can only see the speargun breaking through the gravity field, but it can't see the speargun hitting the turtle shell.

However, the giant tortoise felt it.

In the last second of its life, it felt very clearly that a powerful force, a force of destruction that could destroy everything, descended on itself.

The moment the speargun touches the turtle shell, the turtle shell is shattered!

Even if the tortoise shell has been strengthened by extraordinary powers, in front of the spear of Heaven's Punishment, it is no different from a paper shell. With the impact point as the center, a tortoise shell with a radius of more than 1 meter instantly cracked and collapsed.

Then the internal organs and bones under the turtle shell were also shattered!

The flesh and blood of the giant tortoise shot in all directions like an explosion, covering the ground with a radius of tens of meters in the blink of an eye.

Then, the speargun that completely penetrated the giant tortoise hit the rock on the ground with a loud "bang", the ground moved and the mountains shook, and smoke rose.

One hit!