The attackers who appeared this time have reached the bronze and silver level, so the next time it must be above the silver level, or even more difficult to deal with humans!

And if you think about it, the latter is more likely!

After all, it is already great to be able to reach the bronze level at this stage, where can the mysterious person find so many silver-level mutant creatures?

Xie Yan was able to advance to the silver level, all by relying on his own transformation ability and multiplication ability, and ordinary animals and plants could not use the aura of most of the mountains for their own use like him.

Even so, it took him months to move from Bronze to Silver!

Therefore, in order to ensure the scale of the attack team and the strength of the attack team, there is a high probability that the mysterious person will bewitch humans, at least in Xie Yan's opinion, he will do so.

"In that case, it's better to treat the imaginary enemy as a human being, and sooner or later we will have to come into contact with them." Xie Yan said secretly.

Whether it is a peace negotiation or a big fight, he must have the ability to fight back at the level of mushrooms, and only with this level of lethal weapons can he have the right to speak and the initiative.

In addition, he must also have the ability to fight with conventional weapons, and he must not be able to return fire with large-scale weapons when someone comes in a helicopter...... Not to mention waste, there is a possibility of hurting yourself.

"Come on, then."

Xie Yan shook his body and started a new round of expansion tasks.

There is also the old saying, the explosion army first opens the mine, and only when the resources are sufficient, can we talk about the scale.

Xie Yan began to take root, and this time, he was ready to use a new rooting strategy. His rhizomes can be generally divided into three types, the main rhizome, which is divided into rhizomes and rhizomes. In terms of absorption efficiency, the main rhizome is greater than the split rhizome, and in terms of transmission efficiency, the main rhizome is larger than the split rhizome and the rhizome is greater than the rhizome.

The problem Xie Yan encountered last time was that the root absorption efficiency had reached the upper limit, so this time he prepared copper-colored energy to create roots, and used cyan energy to create split rhizomes.

As for the taproot, it is already silver, so there is no need to change it for the time being.

Not long after he started to expand, Xie Yan encountered the first problem, there was too little spiritual energy in the energy storage bag!

Energy and psionic energy are like water pressure, the more they are, the faster they can spawn branches, leaves, and rhizomes, and the smaller the number, the slower they will be.

Previously, he only used ordinary energy to expand, but in this case, as long as the root system is large enough, photosynthesis can keep up with these two points. And if you want to use psionic energy to expand, then you need to meet more than just the above two conditions, after all, compared to the energy that can be used directly, psionic energy must be converted into an energy storage bag to obtain.

"Looks like we're going to have to build a warehouse." Xie Yan said secretly.

Therefore, he could only temporarily abandon the development plan of the green stem copper whisker, first expand the ordinary root system, and use the energy to give birth to a set of basic conversion facilities, and then expand.

Xie Yan began to give birth to ordinary rhizomes, and shook off the old leaves on his body and replaced them with new leaves, after doing this, he gave birth to the first eye plant ten meters away from his body, so that it continued to thicken and grow and open branches without scattering leaves, and finally formed a big tree without leaves.

Then, he began to spawn energy storage sacs on the trees, one two or three...... until the whole tree is stuffed to the brim.

Later, he gave birth to another large tree at the other end, which was also full of energy storage bags.

"The one on the left is called the green tree, and the one on the right is called the copper tree." Xie Yan chose a name for the two books.

The transformation factory is there, and the next step is to pour a lot of energy and aura into it, and when the energy storage sac on the green tree is filled with cyan spiritual energy, Xie Yan will begin to give birth to split rhizomes, and when the energy storage sac on the copper tree is filled with copper-colored spiritual energy, he will begin to give birth to roots.

When the copper whiskers appeared in the soil, Xie Yan's rate of absorbing nutrients skyrocketed! The efficiency is several times faster than before!

Taking advantage of this opportunity, Xie Yan got a few more green trees and copper trees out.

When he felt that it was almost over, the expansion officially began!

One eye after another was inserted, and the two-colored rhizomes began to encroach on the soil. Because there is no need to engage in any miscellaneous disguises, it doesn't take too much energy to expand, as long as the eyes are plugged in, and the expansion speed flies quickly.

As he saw more and more eye plants, Xie Yan's field of vision became wider and wider, which allowed him to see the situation in the surrounding area clearly.

It is a valley surrounded by mountains on three sides, the left and right sides are decent, but the mountain in the middle is more special, as if it has been cut from top to bottom, revealing a rock wall with white flowers.

Xie Yan's location is under this mountain wall.

In addition, there is a small stream in the middle of the valley, which attracts many animals that come to drink, such as the big stupid bear......

And the source of the stream is on the mountain wall behind Xie Yan, there is a big gap there, and a large amount of spring water flows out of the gap, because it has just rained a few days ago, so there is enough water at the gap.

It is worth mentioning that the three-color bee also set up its new home on the cliff, and before building the nest, the queen bee specially sent a group of worker bees to measure the height and arm length of the bear, to ensure that the new nest should be built in a place out of the reach of the bear, so as not to turn around and be harmed again.

Xie Yan continued to expand outward, until the forest outside the valley stopped.

"So if you want to get into this valley, there are three ways to go! The first is from this forest outside the valley, the second is from the path from which I came, and the third is to climb over the mountains on either side and descend from the mountains. ”

Of course, there is a fourth one, that is, jumping from the cliff behind Xie Yan......

"Then the defense will focus on the exit of the valley and the path I came from, and the hills on either side."

"Wait, if this is so wide, why don't I build a city? And then create a long-range weapon to erect on the walls of the city and shoot? ”

"If the resources can keep up, I can get another outer city out, double defense! You can even build an urn city at the entrance to the valley and along the passage paths! ”

Thinking of this, Xie Yan shook the leaves excitedly, "It's feasible, this idea is definitely feasible!" ”

He doesn't need to do any camouflage now, all the resources can be spent on the blade, and the soil is quite fertile, and there will be no shortage of light and water!

"This is the ideal base!" Xie Yan's heart was surging.

Of course, the road has to be taken step by step, for example, to build a shooting weapon first?

Xie Yan moved out several previous research projects that had been abandoned.

"Then let's build a cannon first!" Xie Yan rubbed the leaves and began to conceive.

Guns and cannons, the principle is similar, they are all through gunpowder combustion to pressurize the chamber or chamber, and then give the bullet and shell the initial velocity. And the gun chamber is divided into a rifle and a smoothbore. The rifling accuracy is high, but it is difficult to manufacture, and the smoothbore accuracy is low, but the manufacturing is simple.

In addition, it is possible to add a tail to the shell to improve accuracy, but it is enough to choose one of the rifles and the tail fin, and there is no so-called superimposed effect.

As for which one to choose, it depends on the difficulty of the process and the manufacturing price. Generally speaking, firearms are rifled, because the barrel is small and it is easier to make a rifle, so the bullet does not have a tail. The cannon is long and thick, and it will be very troublesome to get the rifling, and the cost is high, so the shell has a tail!

Of course, these are the situations on the human side, Xie Yan doesn't have the difficulty of manufacturing here, how he wants to build it. However, he decided to follow the human system, with rifles for guns and smoothbores for cannonballs.

In Xie Yan's view, it is better to unify the standards of weapons and equipment.

Of course, it is easy to say, but in fact it is difficult to do, and Xie Yan soon ran into a problem.

"It's not that simple." Xie Yan sighed.

…………

Thanks for the popular tipping in the dark