Although the four skeleton crossbowmen made before were powerful, they were not much of a threat to the Jiaolong at the peak of the ninth layer of the Transformation Stage. Don't look at the bones of the blood whale revealing the breath of a level 20 sea beast, but that can't scare the dragon. Jiaolong is a royal family in the sea, how can he be afraid of other demon beasts of the same level. Moreover, the actual power of those four powerful crossbows was not enough to shoot through the scale armor of the dragon.

At present, what is the most capable of piercing through the dragon's scale armor in Yuan Tian's hand, which is the dragon horn of the dragon itself. The dragon horn obtained from Qin Chuan's head can be said to be the best material for making crossbow arrows. Although the dragon horns of the dragon are very large, there are not many dragon horn arrows to be made, so most of the arrows still rely on the dragon bone to be made, and the dragon horn arrows are to be used at the last moment.

There is another thing that is troubled by another source, and that is the power of the crossbow itself. Although dragon skin is a very good elastic material, as long as there is enough arm strength to pull the string and shoot out of the force, the amount of force is definitely not small. Even if the arm strength is not so great, you can use your feet to stare at the crossbow and use the strength of your whole body to pull the string and hang up. However, that kind of power Yuantian still felt that it was not enough, and that method was too slow and stupid.

It would be a pity if the dragon skin, which is so elastic and tough, is only used to make bow strings, and Gentian wants him to be able to exert a greater effect. The first sixteen-position spiral acceleration crossbow was scrapped after one use because there was no good crossbow body material. Not only was it scrapped, but it also injured Gentian himself, who was holding the crossbow. Later, with the bones of the blood whale, it would not hurt the crossbow bearer, but Gentian still felt that it was not perfect.

Now it's different, with such good materials as keel and dragon skin, it is completely possible to create an extremely tough crossbow body. As long as the strength of the crossbow body is enough, it will naturally enhance the power plant inside. Sixteen-bit spiral acceleration is not the limit, and Yuan Tian also wants to try twenty-four-bit spiral acceleration or even thirty-two-bit spiral acceleration.

The power of the 32-digit spiral acceleration is not twice that of the 16-digit acceleration, but 256 times the effect of it. The speed and penetrating power of the crossbow arrows shot by this acceleration effect are naturally self-evident, but it is also a huge test for the crossbow itself. The test is not only the sturdiness of the crossbow itself, but also the design of the track during the acceleration process, if it is not reasonable, it is likely that the crossbow bolt will fly out halfway during the acceleration process and shoot itself.

Yuantian is worthy of being a master of manufacturing, and the matter of drawing drawings and calculating data is handy. If the alchemists in the manufacturing group saw this drawing drawn by the leader of the source group, they would probably have to kowtow to him in worship. Especially the young alchemist, who is also a fan of mechanism manufacturing, he also has a lot of small inventions, but compared to what Yuan Tian is doing so far, his small inventions are simply unseeable.

Thirty-two spiral-accelerating crossbows, and the arrows are still sharpened from dragon horns. Even if a monk in the Returning Yuan Period and the Returning Body Period suffered such a sudden, he would definitely be injured. If you don't have a good defensive magic weapon, your body won't be able to resist such a ferocious crossbow arrow.

Yuan Tian didn't plan to rely on just one arrow to kill a dragon at the peak of the ninth layer of the Transformation Stage, although the power of this crossbow arrow was definitely not small, but the dragon would not stand still and wait to be shot. Besides, Jiaolong is not one of those sea beasts with low IQ, in addition to relying on his strong body, he will also use some magic weapons. Yuan Tian had every reason to believe that the Qin Clan's Dragon Clan would give the best treasure of his clan to this representative participating in the duel.

After being busy all night, Yuan Tiancai designed the crossbow frame of the thirty-two spiral acceleration crossbows. The crossbow carriage is only one part of the crossbow body, because the crossbow body also contains the power system and the trajectory for loading and firing arrows. This crossbow alone wasted a lot of Yuan Tian's thoughts, although the dragon skin and keel are very tough, but try not to let the crossbow frame suffer useless impacts. The strongest crossbow bolt has been fired at the lowest cost, and this is the result that Yuan Tian wants.

The drawings for the ballista have already been drawn, and the next step is naturally to enter the manufacturing process. However, Yuan Tian was not in a hurry to make a move, because he still had one thing in his hands, that is, the spiritual power card slot of the power source of the strong crossbow. First of all, he doesn't have a spiritual power card slot now, so he has to apply to the Penglai Immortal Alliance organization to buy some. Members of the organization will definitely have a discounted price for purchases, but they will not cost a penny. This is where Penglai Xianmeng is powerful, and it does not forget to stimulate domestic demand when making money through foreign distribution.

On the Nanzhou Martial Arts Continent, there is also the Qiqiao Pavilion grocery store of the Penglai Immortal League, and it is not only the city of God of War City. Although there are no stores opened by Penglai Xianmeng in those war-ready cities in the interior, there are Qiqiao Pavilions that are not good chains in many coastal cities. Even if Gentian is not familiar with those members of other cities, he can transfer goods from there with his identity as the deputy leader of the manufacturing team.

Spiritual power card slots are still relatively scarce, even if they are transferred from the Qiqiao Pavilion grocery stores in various cities, Yuan Tian has only gotten together sixty-four spiritual power card slots. The Nanzhou Martial Arts Continent has never had to be better than the Dongzhou Xiuzhen Continent, and what the monks here are thinking about is how to practice martial arts and how to fight, at most, they are thinking about heavy weapons and heavy armor in close combat, and they are not very interested in manufacturing long-range weapons and so on. Therefore, in the few stores of Penglai Immortal League here, the number of spiritual power card slots placed is very small.

If there were no mistakes, the sixty-four spiritual power card slots would only be able to make two thirty-two spiral acceleration crossbows. This is far from the effect that Yuan Tian wants, even if the sixteen spiral acceleration crossbows held by the four skeleton crossbowmen are dismantled, they can only remove sixty-four more spiritual power card slots, and two more strong crossbows can be made.

Time was waiting for no one, and Yuan Tian submitted an application to the headquarters to request the approval of some more spiritual power card slots, and at the same time began the design and manufacture of the entire crossbow body. In addition, he did not forget, using the dragon bones and dragon horns to sharpen some crossbow arrows first.

Crossbow arrows are not just a casual one, and they are also exquisite. In order to be able to travel in a spiral-accelerating orbit, the bolt should not be too long but also ensure its penetration and balance. If the penetration is not enough, it will greatly affect the lethality of the crossbow arrow. If the balance is not enough, it will be easy to miss or will not be able to shoot at all.

Now Yuan Tian is a workaholic, except for taking care of a few small chrysanthemums in the Bagua Bronze Mirror space, the rest of the time is used to busy with the crossbow work. Now he doesn't have much of the heart to drink and eat meat, and he doesn't even sleep. There are less than three months left before the time to decide life and death, how can you still waste time by eating, drinking, and drinking.