After confirming the limits of the old electromagnetic cannon attack method, Shi Leiyin also began to improve the electromagnetic cannon attack.

The coil pushes and accelerates, and the vacuum ultra-low temperature barrel has no room for improvement. At most, the cooling rate will become faster after the upgrade, and there will be no roasted meat.

All that's left is to increase the voltage of the coils, so that the coils produce higher electromagnetic propulsion, and improve the shells themselves.

The former is actually very easy to do, after the qualitative change in the energy level is discovered, Shi Leiyin can easily increase the voltage in the coil to more than ten times the previous one by using the compressed new energy, which can bring stronger acceleration, and of course the consumption will be greater.

At the same time, Shi Leiyin also found that if you use a longer barrel and add more coil parts, you can also greatly improve the acceleration of the electromagnetic gun, and similarly, this method will still increase the energy consumption.

When the two methods were used at the same time, Shi Leiyin noticed that his body seemed to be unable to withstand the damage caused by the increased power of the electromagnetic cannon. At the same time, the shells could not afford it. The acceleration and heat generated by the huge amount of electrical energy caused the alloy cannonball originally used by Shi Leiyin to dissolve slightly before it left the muzzle, which caused the attack accuracy to be more miserable than before.

This situation forced him to find a new alloy structure that would not only be used to form the shell, but also to form part of the barrel.

In the beginning, the main reason why Shi Leiyin used his own body as a cannon barrel was that his body was extremely resilient, and compared to any kind of metal, Shi Leiyin could transform his own body into a superconductor at room temperature. This is an advantage that no metal known to Silraying has, and it is also the best barrel material for the type of electromagnetic cannon used by Thundering.

However, after increasing the voltage, even Shi Leiyin's body, which had evolved once, still suffered some damage when firing the electromagnetic cannon. In fact, Shi Leiyin didn't care much about this kind of damage, and it could be repaired automatically almost instantly. However, when this damage occurs, the electromagnetic cannon has not yet completed firing, and this damage will cause a short circuit in the coil composed of Shi Leiyin, causing the cannonball to be unable to accelerate to the theoretical speed. Although it can still be successfully launched, the power will be reduced by at least half, and more importantly, the part of the damage and the impact are random, and Shi Leiyin cannot avoid the impact of the damage by setting up preventive measures.

Since the power could not be avoided, Shi Leiyin simply gave up directly using the flesh to form a superconducting coil. Instead, it is prepared to use low-temperature superconductivity to make the body make the alloy that makes up the coil at low temperatures, making it a superconductor.

Fortunately, this is a world of swords and sorcery, the laws of physics are not so strict, and all kinds of magical metals that are enough to make Newton and Truss's coffin plates unbearable are endless. In the case that Shi Leiyin once again owed a lot of points, he still found a suitable low-temperature superconducting alloy. Moreover, the appearance of this alloy, which only needs minus 30 degrees Celsius to enter the superconducting state and has a maximum increase of 100 times the amount of thunder and lightning magic, also allowed Shi Leiyin to pay off all the arrears smoothly and make a small profit. After confirming the effect of this magic alloy, the headquarters of the Jinkisi Chamber of Commerce directly gave Shi Leiyin more than 50,000 points and a reward for unlimited use of this test area. By the way, Lian Ku was rewarded with a one-star promotion in military rank, which made the maze chief once again worry about Shi Leiyin's whereabouts while smiling from ear to ear.

Using the body to create a low temperature environment is actually very difficult for most creatures to do, even if it is a magical creature that can survive in a low temperature environment of tens of degrees below zero or even hundreds of degrees, most of them only adapt to the temperature and use low temperature, not to produce low temperature by themselves. However, Shi Leiyin's luck has to be said to be really good, this time the special slimes that were devoured during the big upgrade are not only huge, but also diverse. Among them is a special slime that can change its body temperature on its own. This special slime, which was named the Temperate Slime by Shrayin, has only one ability that is basically useless for survival, which is to change the temperature in the body. They are able to continuously transfer heat from the body through the body cells, and isolate the heat from entering and leaving, so that the temperature in the body rises or falls. This particular mutation appears to be due to the fact that they live near a species that uses snake-like infrared vision to hunt. This change in body temperature can obscure the creature's ability to hunt infrared in the red.

After this ability was obtained by Shi Leiyin, it became the best ability to make a cryogenic environment, although the speed of forming enough low temperature in this way is slow, but it can form an extremely low temperature of about minus 170 degrees, which can not only be used to make superconducting cannon barrels, but also can be directly sprayed out as a cryo attack, and the effect is almost equivalent to a sixth-order frozen magic.

Of course, when he discovered that the effect was equivalent to magic, Shi Leiyin also found that he seemed to have forgotten that there was magic freezing in this world, and that the Ice Tooth Dragon itself was an ancient dragon that could use magic cryogas. This made Shi Leiyin feel that it was an idiotic thing to use physical means to get the freezing effect. However, after comparing the ability to use the Ice Tooth Dragon and the way to change the temperature of the slime, Shi Lei Yin calmed down a lot. After all, a slime is a slime, everything is towards low consumption, within minus fifty degrees, the energy spent by the temperature change slime per degree drop is only one-thousandth of the ice tooth dragon's magic power cryogas. Between minus fifty and minus one hundred degrees, the cost of the Ice Tooth Dragon's mana freeze gas has decreased a lot, but it is still nearly a hundred times higher than that of the slime. However, it takes about fifteen minutes for the Variable Temperature Slime to reduce the temperature to minus 100 degrees, and it only takes five seconds for the Ice Tooth Dragon, which is a bit of a difference in speed. Therefore, Shi Leiyin simply memorized two sets of cooling methods at the same time, which were used to correspond to the need to maintain magic power and quickly form a launch environment.

After completing the main low-temperature environment of the barrel, it is time to form the coil gun body. Since this special alloy is synthesized by Shi Leiyin from the metal in his body, he only needs to absorb more metal in his body to meet the needs of the gun body alloy. It's just that in this way, Shi Leiyin found that his weight was going to increase a lot, after all, these were pure metals, not energy, and they couldn't be reduced by means of compression. In desperation, Shi Leiyin could only keep enough cannon body metal with a length of three meters and a diameter of ten centimeters in his body. If you need to increase the number of barrels in the future, you need to absorb the metal from the ground and recraft it.