This was the first time Lin Fei had killed such a large predator, and it was also the first time Xiao Hei had seen the double-crowned dragon die in front of his eyes.

This large corpse was difficult to deal with, which made Lin Fei very troubled. At that time, he didn't know how to dry and store bacon, nor did he know how to roast meat over fire, so he tried to cut off a small piece and taste it.

Lin Fei's move made Xiao Hei feel nervous for no reason. That innate fear of carnivores came back at this moment.

"Gross-" Lin Fei rolled his eyes and directly spit out the raw meat in his mouth, and the whole person was not good.

"Bah, bah!" he looked bitter, disgusted by the mouthful of raw meat.

Xiao Hei saw this scene, but he was obviously relieved.

Lin Fei even rinsed his mouth with the water from the cistern, and then he felt much more comfortable in his mouth. It is worth mentioning that at this time he had already used a cup similar to a bamboo tube. He couldn't name the plant, but he knew it was hollow and easy to use for water.

He even found a plant pellet that can be used to brush his teeth, making the discomfort in his mouth subside every morning.

Lin Fei wanted to teach Xiao Hei to brush his teeth, but found that it was too "difficult for a strong dragon", so he could only let him grow his mouth big every day like taking care of a child, and then brush his teeth.

The main thing is not to brush Xiao Hei's teeth, there is always a smell when he opens his mouth, which makes Lin Fei a little dizzy.

All in all, because of the lack of information and knowledge, Lin Fei wasted all the food in front of him and did not use it. He just managed to leave a lot of dinosaur bones behind, and he always felt that something so tough would definitely come in handy.

Then Lin Fei saw those sharpened wooden thorns, and his eyes suddenly lit up.

He had already thought of the purpose of these hard bones, but the top priority was to dispose of the corpse of the two-crested dragon that was about two meters high. Otherwise, once it starts to rot, the smell will not only be unpleasant, but may even attract other predators.

But this thing was really too big for Lin Fei, so he was stunned to divide his body and throw it away from a distance, and it took a lot of effort to dispose of it.

After doing all this, he refilled the broken trap and covered it with dirt again.

Then, Lin Fei picked up the white bones left on the double-crowned dragons and began to make tools.

At first, he made bone spears.

The clash between the head-on and the double-crowned dragon is no different from looking for death. Even if you encounter a small predator with swiftness outside, it's best to kill it before it gets close to you.

Lin Fei's first thought was the bone spear, but after seeing the tough and elastic tendons on the dinosaur's body, he was stunned.

"Xiao Hei, come over here. He beckoned.

The little black fox stepped forward suspiciously, not understanding what he wanted to do.

Lin Fei asked it to cooperate with the lifting of its legs, and then tightened the tendons of the double-crowned dragon on the ground, allowing Xiao Hei to step on it.

Lin Fei tried to pull this tendon hard, but he noticed that it was so tenacious that he could only pull it apart with all his hard work. Xiao Hei also felt that it was very difficult to step on the dragon tendons.

The moment Lin Fei let go of his hand, a "collapse" sounded, and the dragon tendon bounced back violently, leaving a deep mark on the muddy ground.

Xiao Hei felt numb from the shock under his feet and didn't want to do it anymore.

But Lin Fei was very excited, let it hold on for a while, and then put the sharpened bone spear on the dragon tendon and pulled.

"Collapse—"

The dragon tendon made a startling sound, and the bone spear flew out directly with a "whoosh" sound of breaking the wind, and then slammed into a tree!

Lin Fei was stunned.

Blackie was confused and didn't understand what was going on.

It wasn't until Lin Fei pointed behind it that Xiao Hei glanced at it...... Also stunned.

Lin Fei was so excited that he thought of something that had never been seen before—a bow and arrow.

Of course, manufacturing is still an extremely difficult process.

First of all, there was such a thing as "bow", which took too much time to appear in Lin Fei's mind. He tried many times, all of which ended in failure.

The wood that acts as a wooden bow is too brittle, and when you pull it, it will "click" and break. The material used as a carpenter is too hard, and no matter how you pull it, it is straight, and you can't open the bow at all.

Fortunately, the most important thing in this jungle is wood, and Lin Fei spent a lot of time and finally found a satisfactory material. Strong and resilient, he made a wooden bow out of this purple-like twig and double-crowned dragon tendons.

When it was time to open the bow, Lin Fei would even put his foot on the bow, and then use both hands to pull the bowstring apart, so that it could be tightened to the limit, like a full moon.

The destructive power of the sharp keel arrows fired in this state is extremely amazing, no more than a certain distance, and can even penetrate the trunk of a tree to a depth of nearly twenty centimeters.

Know that they are hard trees, not fragile flesh and blood.

Of course, beyond a certain distance, its destructive power decreases.

And what made Lin Fei even more troublesome was that the crosshairs of this set of bow and arrow weapons were very worrisome. The body lacks basic balance, and will be almost "twisted" during flight, which will deviate from the actual aiming position.

It didn't seem like a big deal, but Lin Fei always felt that it might be a fatal flaw.

He was short of information and knowledge, so he naturally didn't know that the high movement of the arrow in the air produced the flow of air currents. The slightest movement of air can deflect the arrow, making it less accurate.

Later generations of cold weapons discovered this problem, and later gradually popularized a simple and effective solution - feathers. Two symmetrically trimmed feathers are set on either side of the tail of the arrow to minimise the impact of air currents, maintaining its stability and trajectory.

Lin Fei suddenly remembered that he had seen a herbivorous dinosaur bitten on the tail, causing it to lose its balance when running on both legs, fall heavily to the ground, and be killed by predators.

So he looked at the dragon bone arrow in his hand and showed a thoughtful look.

"Does it need a tail too?" Lin Fei's face was full of suspicion.

He was like a genius full of whimsy, and tried many things to be the "tail" of the keel arrow, but the results were all disappointing.

In the end, Lin Fei could only give up and accept this fact. The keel arrow will deviate after it is fired, and the farther the distance, the greater the deviation will be, which is equivalent to reducing its actual effective range.

But even so, it is also a big killer that Lin Fei can't put down.

Even when he was sleeping, he never left a few things on his body.

Mother Dragon's Dragon's Beak Sword, Dragon's Tooth Blade, Wooden Bow and Twin Crowned Dragon's Bone Arrows.