As we all know, Lin Ze's current location is in the Xuanyin Tomb, and it is also submerged under the surface of the lake hundreds of meters deep.

It can be said that for the humans and brute beasts of the Nine Layers and Nine, this is the desperate situation within the desperate situation, the endless darkness within the endless darkness.

If you want to live here, it's a lot of difficulty, if not impossible.

Even Lin Ze, now he doesn't have the confidence to do this.

At the bottom of such a deep lake, Lin Ze can ensure that you have enough food and oxygen to absorb, but there is absolutely no guarantee that you can see the sun, breathe the breath of nature, and live freely here as if you were on land.

Not to mention, a biosphere was directly established here.

Such an ability, not to mention the current Lin Ze, Lin Ze believes that he will not have such an ability until he advances to the Jindan stage.

It's not just about arranging a dwelling, it's about building a biosphere that can be lived in for generations to come, just a few thousand meters underground.

Lin Ze doesn't have such an ability.

Others, like Zhou Qiang, also don't have such ability, and they don't even have the ability to understand the difficulty here.

However, they were indeed in awe in their hearts, after all, they would never be able to carve out such a place in the depths of the earth.

This underground world has been running continuously for hundreds of years, and there is no one to maintain it in the middle, and no one has come to repair it, but it can still maintain such a fairyland, as long as it is a little thinking, you can guess the great power of the Xuanyin Master.

"I really don't know where the sunlight here comes from?" Zhou Qiang couldn't help but ask.

This is a few hundred meters deep at the bottom of the lake, so it stands to reason that there will be no sunlight here, but the light here is not far from the sunlight outside.

"Hey, that's really the truth!" Lin Ze was also surprised in his heart.

Indeed, the sun here is like the sun outside.

Everyone looked up in unison and looked directly at the sky.

Soon, they noticed something different.

In their eyes, the sky is full of sunlight, but their sensitive senses feel that these sunlight is actually everywhere.

Just like a light bulb at night, a light bulb is a light source.

Obviously, whether the light here is really sunlight or not is really debatable.

Lin Ze also looked at it, and could see that the top of his head was full of snow-white light, but these lights were not directly illuminated by the sun, and he found that these lights were all emitted by the pure white gold the size of a fist, and the crystal clear spars around his body.

"It's a sunstone!!"

Zhou Qiang let out a low cry in his mouth, and directly said the names of these spars.

"It's the sun spar!" Han Dong, who was walking in front, stopped and looked up before saying.

"How many?" When Zhou Qiang said these words, the Adam's apple in his neck obviously moved up and down a few times, as if he was swallowing something.

"Hehe, there are too many to count!" Han Dong smiled mischievously, and drew a large circle with his hands in the depths, as if he wanted to enclose everything.

Lin Ze couldn't help but look up and recognize it, and with a burst of emotion in his heart, he had some understanding of the luxury of the Xuanyin Venerable, a great supernatural person.

The sun spar is not a thing that is absent in today's cultivation world, and it can even be said that it can be used in very few places, but because of its wide application, the price is absolutely sky-high now.

Taking Han Dong and these people as an example, if they want to buy a sun spar, to be honest, although they can't afford it, if they don't go bankrupt, they need to spend seven or eight layers of their family property, it is definitely not lying.

However, like this cave, just to green the environment and provide sunlight to the creatures below, ordinary martial artists, even those top powerhouses at the level of supreme grandmasters, would never be able to do such a wasteful thing.

As for the use of the sun spar, one of them is very wide, that is, to help cultivate elixirs, spiritual fruits or something.

After cultivating to the seventh or eighth level of the day after tomorrow, cultivators need to think about their later cultivation and future generations, so it has long been a common practice to open up some spiritual fields and plant spiritual grass.

As long as the elixir and spirit fruit can be cultivated, there are people who plant it, but the quantity is more or less, and the quality is good and bad.

Even Lin Ze had the Plane Seed World in his hands, and there were thousands of hidden medicine gardens in the Yin Wind Canyon that he didn't pay much attention to.

If it is an ordinary, or ordinary spiritual herb, it can naturally be planted outdoors at will like many low-level spiritual herbs, and there is no need to care much about it, just by hiring some subordinates to take care of it.

However, what if it was replaced by those extremely cherished spiritual herbs?

Can you rest assured that they will be planted outside the cave in such a bright way? can you ask someone to take care of them at will? can you just let these spiritual herbs face the damage of wind and rain?

The answer, of course, is no.

It seems to be a thousand-year-old jade, if you plant it outside, once other martial artists see it, then no matter whether this thousand-year-old jade-like mushroom is ripe or not, what will happen next, then I don't need to say more.

Even if you luck it well, no one has ever discovered the thousand-year-old jade mushroom you planted, but when the thousand-year-old jade mushroom is ripe, it will exude a strong fragrance of elixir.

At that time, perhaps human warriors would not easily find it because of their sense of smell, but for those brute beasts with an extremely keen sense of smell and could easily smell the fragrance of spiritual herbs dozens of kilometers away, these medicinal scents were the best compass.

This time, you will not only face warriors, but also countless brute beasts attracted by the scent of these medicines.

Moreover, as time passes, the number of brute beasts attracted will increase, and their strength will become stronger and stronger.

What will you do at this point? What can you do?!

Therefore, in order to avoid such a thing, if cultivators have cherished-level spirit grass, most of them are cultivated in some very secret caves.

In this way, things like spiritual springs are just that, it's not a big deal, and they can be easily found in some places where there is plenty of spiritual energy, but the sunlight that you don't usually care about has become a big problem at this time.

Not to mention the fact that the temperature is adjusted to a temperature level that is suitable for the growth environment of the spiritual herbs, there are many problems that are difficult to solve just by introducing light into the cave.

The easiest way is to directly open the skylight to attract the sunlight rays in the sky, more to open a big opening, less to penetrate several gaps, has achieved the maximum concealment effect.

It's just that whether this effect is good or not, not to mention, the security problem alone is not easy to solve.

These holes or crevices can be entered, so the fragrance of the elixir cannot be emitted?

In the first place, isn't it the same as opening the door directly to invite the thief in!

Therefore, at this time, the sunspar plays its irreplaceable role.

The biggest feature of this kind of spar is that after it is excited, it can emit sunlight that is no different from ordinary light, and after being restricted and excited by a special formation, it can also adjust its intensity at will, and the effect of light intensity is really a good thing that cultivators can cultivate spiritual herbs in their own cultivation caves.

With such a huge effect, what do you say will happen to the price of sunpar?!

In addition, the sun spar contains abundant sunlight, which means that it is a yang attribute spiritual material.

In this way, it can be used to create spiritual materials to deal with Yin-type brute beasts.

Things like those dark beasts underground, zombies, ghosts, and the like are the best kind of spiritual materials.

The Shenzhou Continent is rich in spiritual energy, so it is really normal for some ghosts and zombies to appear.

As for whether these zombies and ghosts will threaten the warriors, hehe, there is really no problem with this.

For a martial artist with a yang attribute, the stronger his strength, the more yang energy on his body will be, and at that time, if a ghost or something like that comes to the door, it will be self-defeating.

As for zombies and the like, the true qi on the bodies of these yang-attribute martial artists can still beat them, so zombies can't threaten these martial artists either.

Of course, there are also extremely powerful ghosts or zombies, but as soon as these powerful ghosts and zombies come out, the congenital, grandmaster-level, grandmaster-level, and even supreme grandmaster-level powerhouses will immediately come out and kill them.

They did this, one to prevent other ordinary people from being slaughtered, and the other to obtain the pure yin qi from these powerful ghosts and zombies.

As the saying goes, the solitary sun does not grow, and the solitary sun does not grow.

For a yang-attribute martial artist, it is not enough to only have yang-attribute true qi in his body.

Once the yang attribute true qi has accumulated to the extreme, it will also burn the body of this martial artist.

Therefore, in order to avoid such a thing, it is best for this martial artist to absorb some yin attribute true qi into the body to neutralize the yang attribute true qi in the body, so as to achieve the ultimate yin and yang peace.

And the purer this kind of yin attribute true qi, the better it is, and the stronger the effect.

Therefore, ghosts and zombies like these innate level are the favorite ghosts of these strong people, because the pure yin qi on their bodies is the most refined, and the greater the benefits for these martial artists.

Some records clearly record that once a congenital ghost or zombie appears, it will often attract more than a dozen strong grandmasters to exterminate it........