In the cave in the wilderness, Xie Yan still didn't have any clue what defensive weapons the fourth echelon should equip. To be precise, there is no suitable plan, if there are sufficient resources, Xie Yan can just get a row of antlers.

In the end, Xie Yan came to a conclusion that at present, he has no way to directly block the herd without saving materials, and can only use indirect means to consume the other party's vital strength.

So Xie Yan retreated and chose the combination of tripping rope and trap, his purpose was very simple, to trip over the cow running in front and increase the obstacle to the cow behind.

The tripping rope is very convenient to make, just let the root system of the ground directly expose the ground, he doesn't believe it, his thousands of square meters of root system, can not stop a few cows?

The trap has some difficulties, mainly because of the high requirements for some materials, such as springs, such as the teeth on the trap, if you want to make a thing that can't bite the leg of the cow, it is better not to do it.

In order to obtain high-strength materials, Xie Yan used a large amount of aura to upgrade and strengthen the plant parts.

It didn't take long for the first trap to grow out of the eye, and then Xie Yan slowly pushed the trap onto the leg of the cow corpse in the cave by growing branches, and then touched the switch.

I only heard a click, and the plant trap clamped the cow's leg, but the soft and tender animal teeth did not even break the cowhide, which was obviously an unqualified failure.

And this is the best quality animal trap that Xie Yan can make at present.

But Xie Yan is not discouraged, he still has a way! That is, the sun is allowed to dry the outer skin of the tooth part of the trap, which further increases the hardness.

"If you can't do it again, you can only forget it......" Xie Yan sighed.

So he continued to use the method of growing branches, pushing the trap out of the cave and cutting off the water supply to the epidermis to expose it to the sun.

A few days later, Xie Yan used the old method to let the eye plant outside the cave grow branches, and then put the dried trap back into the cave and placed it next to the corbel.

"Hopefully it will work!" Xie Yan took a deep breath and triggered the switch.

Click~

The trap snapped shut, and the teeth that hardened after drying smoothly pierced into the cow's leg!

"That's it!" Xie Yan cheered in his heart, and the leaves rustled excitedly.

"The teeth could be improved, a little thinner, with a sharper tip." Xie Yan was not proud, but began to make further improvements to the trap, and after reconfirming the feasibility, the fourth echelon of the eye plant began to mass-produce the trap.

For this kind of trap, Xie Yan only needs to maintain the moisture of the spring and some parts, and the consumption is very small.

More than ten days have passed, and the eyes of the fourth echelon are covered with green beast clips, and in addition, Xie Yan also let some useless rhizomes emerge from the soil and act as tripropes.

After that, there is the thorn wall of the fifth echelon, which is not difficult, it can be simply spawned, and it will be built quickly.

When making the thorn wall, Xie Yan was inspired by the previous trap, and he realized that the thorn wall actually does not need to maintain 100% water supply, just like the trap, the power of the skin will be stronger after drying, so all he needs is to regularly replenish some water to ensure that the thorns will not be too dry by the sun, and they are also tough!

After all the work was completed, Xie Yan calculated the current water supply and consumption, and after confirming that the water supply was okay, he breathed a sigh of relief and focused on the bare head of the main stalk.

"It's time to raise a flower!" Xie Yan said secretly.

However, before flowering and fruiting, Xie Yan, who suffered from resource shortage syndrome, began to make storage sacs, and he asked the four plants in the cave to be guarded, each with four water storage bladders and one energy storage bag, and more on his body, with six water storage bladders and three energy storage sacs.

As for the spirit storage bag, so far, he has never filled the spiritual energy, not because the consumption is greater than the expenditure, but because this spiritual energy can be continuously compressed!

This confirms Xie Yan's previous thoughts, maybe when the time comes, the real energy will change and cause a qualitative change, so that the spirit storage bag will become something like a golden pill.

After all the storage sacs were filled, Xie Yan began to bear the fruit in a hurry.

With a huge root system, abundant light, and a steady stream of aura, it took only five days for a flower bone to grow on Xie Yan's head.

Xie Yan roughly calculated the flowering period, and with full supply, it will be able to bloom within a month! As for how long it will take, he doesn't know, but he doesn't think it's too slow.

"The wall of thorns, the traps, the tripwires, the catapult mist, and this stinger wall, this time, no one can stop me from blossoming and bearing fruit!" Xie Yan looked at himself in full armor, full of confidence and at the same time, he also felt a trace of grievance.

Bear fruit......

He obviously just wanted to do his duty as a plant, but he happened to run into a nervous guy who deliberately targeted him.

It can be said that these layers of levels outside are all forced out!

While guarding against attacks, Xie Yan did not fail to consider the identity of the mysterious person, the other party can drive ants, caterpillars and yaks, obviously not the queen ant, the mother of insects, the king of the cow and the like, it is more likely to be the king of beasts.

But there is one thing to say, the dignified beast king, sending a group of caterpillars to deal with a plant, is inevitably too expensive.

So Xie Yan has two definitions of a mysterious person. First, this is a disgraceful guy, and second, the other party has the ability to control the beast, but there are certain restrictions and cannot be controlled at will, otherwise the other party can launch a series of offensives and directly behead Xie Yan under the horse.

In addition, Xie Yan still has some speculations and conjectures about the mysterious person, but the current evidence is not enough, and it needs to be slowly confirmed in the future.

The days that followed returned to calm and boredom, and Xie Yan spent the rest of his time concentrating on cultivating flower bones except for checking whether the defensive weapons were damaged.

On this day, the two little guys suddenly broke into Xie Yan's field of vision.

It was two palm-sized green-haired parrots, and they landed on the thorn wall, chirping, not knowing what they were discussing.

And when he saw the two green-haired parrots, Xie Yan made a PTSD offense, as if he was facing a great enemy. He was about to launch a catapult poison mist to kill two parrots, but when he thought about it, he felt a palpitation before each attack, and this time it didn't, indicating that the two green-haired parrots should just be passing by......

No, not passing by, the green-haired parrot chirped for a while, jumped to the ground, began to peck at Xie Yan's rhizome, and then put the peck off the rhizome in the gap in the thorn wall.

"This is to make a nest...... Xie Yan felt a little weird, birds make nests on plants, this is a rare and ordinary thing, but when this kind of thing happens to him, it always feels a little strange.

"Let's be a pet." Xie Yan shrugged the leaves.

Then, more and more green-haired parrots flew over, they seemed to like the thorn wall very much, Xie Yan guessed that this was related to the color of the thorn wall, these green-haired parrots burrowed into it, and they might not be able to find them if they didn't look carefully.

In fact, the arrival of the birds provided Xie Yan with a lot of benefits, such as fertilizer, so it was a mutually beneficial action. In order to prevent these parrots from touching the catapult poisonous mist and traps, Xie Yan specially created a bird repellent spray, once a bird approaches these things, the pores set up on the nearby eye plants will spray an unpleasant gas to drive the birds away.

In his spare time, Xie Yan will also tease these birds, such as making some explosive sac pods on the vines, and making the capsule suddenly burst when the male and female birds are making love......

Cough...... Although it is very funny, it is actually to avoid a tragedy, after all, it will not be long before the third round of attacks will come, when the thorn wall will most likely be scattered by the various animals that attack, if there are chicks, there is no chance of survival!

As for whether these male birds will leave a shadow in the future, Xie Yan doesn't care......

As the days passed, the flower bones gradually grew larger, darkened in color, and grew into real flower buds.

This means that it's time to bloom again!