"No problem, the drinking water is very easy to handle, we only need to get two water purification filters to solve it, the electricity is also simple, if there is gasoline, directly use the generator to generate electricity, but this will be a little polluting, after all, this intermittent space is quite large, if the power generation continues for a long time, it is estimated that the air quality is very poor." The four-eyed snake said quickly.

"What I have given you to do, of course, is not so simple, my request is to build a series of simple filtration water purification pools, and it is natural power generation."

"Boss, you mean to let us build a water truck to generate electricity, and we must also get a facility with a large amount of clean water?" The Martian was surprised.

"That's right, that's exactly what it means, so next, you're busy."

"But why is it so large-scale, after all, there are less than ten of us."

"Now there are less than ten people, but I still have to give the fault space to create a good breeding ecological pasture, which will be related to us in the future, even if we hide here for a long time, there will be enough food to support us." Li Feng finally said all his thoughts.

"I'll go." The Martian was stunned on the spot.

"What is a shelter, there is only a comprehensive and long-term survival condition that does not depend on the outside world, this is called a shelter, everyone should work hard." Li Feng patted the Martian on the shoulder and said.

"It's going to tire me out." Mars smiled wryly.

"Boss, I have a question." Ling Qian said suddenly.

"Well, you say."

"Since this is our ultimate refuge, I still feel like there's a loophole."

"You mean the entrance to the desert?" Li Feng responded with a move in his heart.

"Yes, the Sahara Desert is sparsely populated, but it is still a hole in our sanctuary." Ling Qian said seriously.

"Rest assured, it will soon be gone. King of Soldiers, you and the Scorpion will do this immediately, blow up the passage above, and swear that no passage can reach here. Li Feng ordered.

"How can we come in again after the bombing."

"Teleport." Li Feng gently spit out two words.

Although the teleportation fee is one million blood essence back and forth, the consumption is very ruthless. But if you compare it to the safety of the shelter, it is not significant.

What's more, Li Feng had already made up his mind at this time, and was ready to develop more minerals to hunt and collect blood essence.

Therefore, the next goal is to concentrate firepower to upgrade the blood crystal space, and if I am not mistaken, upgrading the blood crystal space will not only increase the additional success rate of the synthesis box itself. Even the cost of the conveyor elevator will be relatively reduced.

Therefore, Li Feng really doesn't care about the transmission fee now.

As Li Feng gently spit out the two words "teleport", everyone glanced at each other, and couldn't help but secretly say in their hearts, it turned out that the boss had planned everything.

If all of the above things are completed, then this fault space, which is more than 1,200 meters below the surface, is really the most hidden in the world. The safest and most comprehensive shelter ever.

And then down. Li Feng asked everyone to discuss how to complete the task, but he himself came to the river beach on the edge of the underground river and entered the No. 3 Blood Crystal Space.

Entering the Blood Crystal Space, Li Feng renamed this Blood Crystal Space and changed its original No. 3 Sahara Desert to a "shelter". There is no number.

After doing this, he entered the icon function of the Blood Crystal upgrade:

Level 5 Blood Crystal Space:

With five blood crystals, it automatically collects blood essence with a diameter range of five kilometers, a space with a diameter of five hundred meters, and a teleportation elevator with a diameter of five meters. The cost of one million blood essences is transferred back and forth, and the maximum synthesis function is five life synthesis, an additional synthesis success rate of 5 percent, a maximum of five units of beasts and similar breeding places, and a maximum of fifty units of similar demon breeding quotas.

The next level is level 6 blood crystals, and the upgrade conditions require 100 million.

Level 6 Blood Crystal Space Functions:

With six blood crystals, it automatically collects blood essence within a diameter range of six kilometers, a space with a diameter of six hundred meters, a teleportation elevator with a diameter of six meters, a transmission fee of 900,000 blood essences back and forth, and the maximum limit of the synthesis function is six life synthesis, an additional synthesis success rate of six percent, a maximum of six units of beasts and similar breeding quotas, and a maximum of sixty units of the same kind of demon breeding quota.

……

The above is a series of functions that can be improved by the next level of sixth-level blood crystal space upgrades, and many of them are very practical.

Fortunately, the upgrade cost of the blood crystal space is not as huge as the level of raising creatures.

Li Feng breathed a sigh of relief, he still has 2.1 billion blood essences, what he didn't say, this time he finally has enough blood essences to upgrade the blood crystal space.

"Upgrade to level six......" he sent out a request to upgrade the blood crystal space.

"To upgrade to the sixth-level blood crystal space, you need to consume 100 million blood essence, is it upgraded?"

"Yes."

As Li Feng responded affirmatively, the next moment, his total amount of 2,156 million blood essence was quickly reduced by 100 million.

At the same time, Li Feng carefully noticed that the above-mentioned performance improvements were all improved in real time after the blood crystal space was raised to the sixth level.

The most direct manifestation of the result of ascending to the sixth-level blood crystal space was the horizontal straight line of his line of sight, a ball of red light gradually condensed, and it didn't take long for the sixth blood crystal floating in front of his eyes.

Moreover, the entire blood crystal space is also full of red light, and the surrounding red light wall is constantly expanding, and it continues to change for about five minutes, but the blood essence space at this time has expanded to a space with a diameter of six hundred meters.

The diameter of the central conveyor elevator has also been expanded to six meters in diameter.

The expansion of the diameter space of the conveyor elevator means that the elevator can now accommodate at least six meters in diameter.

Of course, the current six-meter diameter space is actually far from enough to teleport the queen ant, the super snake, the giant octopus and the pluto crocodile, it seems that there is still a long way to go to focus on upgrading the blood crystal space.

Five minutes passed, and the blood crystal space was fully promoted, when Li Feng's gaze fell on the blood crystal upgrade icon again.

Sure enough, the next level of blood crystal upgrade is already level seven, and the performance improvement is the same as the previous one, but the demand for this upgrade has reached 300 million.

Li Feng clearly remembered that it took more than 100 million to upgrade in the blood crystal space. The cost of upgrading the Blood Crystal Space is no longer the previous tenfold increment system, but now it is twice as much.

200 million blood crystals is not much, Li Feng did not hesitate, and continued to send out a request to upgrade to the seventh-level blood crystal space.

Five minutes later. He had one more blood crystal on hand, a seventh blood crystal, and at the same time, the blood crystal space under his feet naturally underwent a series of expansions.

The eighth-level blood crystal space was 400 million blood essence consumption, Li Feng didn't think much about it, and decisively continued to advance to the eighth level.

Five minutes later, the eighth Blood Crystal arrived.

The ninth-level blood crystal space is an upgrade condition for 800 million blood crystals.

"Promotion ......"

Another five minutes passed, and the promotion of the ninth-level blood crystal space was completed. So far, the 2.1 billion blood crystals that Li Feng has accumulated have consumed a total of 1.5 billion blood essences, and there are only 656 million left.

The promotion of the tenth level of blood crystal space is 1.6 billion, but unfortunately, Li Feng's current total amount of blood crystals is not enough to be promoted to the tenth level of blood crystal space, so he can only secretly regret it. Finally exited the icon to upgrade the Blood Crystal Space.

"Congratulations, you've been promoted to the ninth-level Blood Crystal Space. You should have a total of nine blood crystals, automatically collect blood essence in a range of nine kilometers in diameter, a blood crystal space in a diameter of nine hundred meters, a teleportation elevator in a diameter of nine meters, and a cost of transferring 600,000 blood essences back and forth, and the maximum limit of the synthesis function is nine life synthesis. 9% additional synthesis success rate, capped at 9 units of beasts and similar breeding quotas, and 90 units of similar demon breeding quotas......"

"Hint, the soon-to-be-upgraded tenth level of the Blood Crystal Space will open up several new abilities. First, if the synthesis function reaches the tenth level of the blood crystal space, you will soon have the permission ability to re-synthesize. ”

"Second, the authority of the tenth-level blood crystal space is about to open a new function-transformation function."

"Thirdly, the tenth-level blood crystal space permission will reach the permission to purchase the fifth specialty space column."

"Fourth, tenth level blood crystal space permission, you will get the first place to raise plant creatures, please keep up the good work......"

……

A series of congratulations and hints of new functions that were about to reach the tenth level of the blood crystal space were about to be opened, which made Li Feng dumbfounded.

Nima, he is only a few hundred million blood essence now, and he has not failed to meet the tenth-level blood crystal space conditions, which is really fatal.

It turns out that every time the blood crystal space is promoted to five levels, will new blood crystal space functions be opened one after another?

I won't say much about the fifth special vacant column, after all, he knew it early on, but what is the new transformation function?

And secondary synthesis? This means that if you synthesize a demon once, you can still re-synthesize it again, right?

I'm going, can I continue to merge five more Death Worms into it?

At that time, wouldn't it be that the Crocodile will have nine lightning pillar emitters?

The biggest harvest is still the most promotion, it turns out that when he reaches the tenth-level blood crystal space, he finally has the first place to raise plants, does this mean that he can start preparing to raise the Snake Emperor Cave's that level of purple moss and moss mushrooms?

In this regard, Li Feng was really itched by several new features, and now that the blood essence is temporarily insufficient, he can also silently withdraw from the blood crystal space and return to the real world.

After withdrawing, Li Feng already had four more blood crystals in his hand, and the strategic significance of these four blood crystals could be said to be too big after the blood crystal space had the ability to teleport.

It also means the creation of four new subdivisions.

"Okay, let's go, let's go down, and act separately......" Li Feng retreated from the blood crystal space and led everyone out of the underground fault.

At this time, the ant queen who had grown to the eighth order was no longer afraid of the Snake Emperor, and then he was completely left to the free development of the ant soldiers.

Obviously, the queen ant is very anxious at the moment, driving all the Titan Crypt ants to dig the hole of the Snake Emperor Cave, and it seems that she is still very eager to move the entire group into the Snake Emperor Cave.

However, Li Feng communicated with her for a while, but he still hadn't figured out what the queen's forced idea was?

Could it be a heaven-level purple moss?

But this shouldn't be, after all, the queen ant wants to eat these purple moss, and she can completely let the ant colony temporarily dig it out and eat.

"It's weird!"

However, Li Feng, Mars and others had already searched the Snake Emperor Cave, and there was nothing strange in it at all.

Could it be that there are secrets hidden in those dense small snake caves?

If this is the case, Li Feng can only do nothing for the time being, after all, they can't enter such a thick bowl of hundreds or thousands of snake caves.

Hey, it doesn't matter, anyway, now that this place has been stabilized, I can only make a conclusion next time.

Thinking of this, Li Feng waved his hand and led everyone back towards the original passage, and walked back to the ground again, which was also nearly an hour.

Among them, when everyone walked to the Shiyan Crypt a long time ago, Li Feng stopped and instructed the King of Soldiers: "Don't blow up this Shiyan Crypt space, keep it." ”

"Your mission is to blow up all the voids in front of the rocky crypt."

"Understood, boss." Soldier King Xu Wentao nodded quickly.

According to Li Feng's memory, the stone rock cave is about seventy or eighty meters away from the ground, although this stone rock cave is not very large.

But there are at least more than 40,000 square meters, so much space for storing some food and resources, just right.

After walking in the left, right, and right passages for about ten minutes, everyone finally climbed out of the ground again from the passage.

At this time, the surface world is just noon, and the Sahara Desert is particularly hot at noon.

Li Feng did not stop, and walked about 100 meters at the exit, then took out a blood crystal from his arms and planted it decisively.

At this point, with the ability to teleport elevators, the ant colony troops thousands of meters underground can be teleported to the surface of the desert at any time as long as he needs it, which is simply the best of both worlds. (To be continued......)