There is no light, there is no water, and this is what happens thousands of feet deep underground.

Zhou Yang followed Ma Shaoyang from a cave hidden under the sea of sand and flew down, and soon came to such a place.

The size of this underground cave is still unclear to Zhou Yang, but the environment inside is indeed very harsh.

In such an environment, even those demon beasts that were accustomed to the harsh environment of the boundless sand sea would not be able to survive in this kind of place for a long time without a third-order strength.

After all, demon beasts are not like human monks, they can carry Bigu Dan and a large amount of water with them, and they can even use spells to gather water vapor to form clear water to drink.

For example, Zhou Yang, he carries dozens of bottles of Bigu Dan all year round, and a water storage vessel with a large amount of water.

These Bigu Dan and Qing Shui, plus the hundreds of thousands of spirit stones he carried, were completely enough for him to persist in an extreme environment for more than ten years without starving to death or dying of thirst, nor would he delay his daily cultivation.

Of course, although demon beasts can't carry supplies with them like monks, some special kinds of demon beasts can survive without water, food and meat.

For example, the fourth-order demon beast "Gold Devouring Beast" that Zhou Yang killed with the ancestor of the Chen family at the beginning only ate spirit gold and spirit ore, and the "Earth Dragon Earthworm" he once encountered could also maintain basic survival by eating only soil.

There is also the fourth-order demon beast "Huolin Beast" that he will face this time, which is also a special demon beast that lives in the magma and earth fire and feeds on the flame aura.

These special monsters often inhabit extremely harsh places, and in that kind of place, they have a great home field advantage, and the demon beasts or monks who can't survive in that harsh environment like them will be greatly affected when they fight them on their home field.

"I'll restrain my breath first, so as not to disturb the demon beasts inside, you lead the way in front!"

In the dark underground cave, Zhou Yang accurately aimed his gaze at Ma Shaoyang, who was not far away, and gave an order in a deep voice.

After saying that, he immediately pinched the law, and the aura on his body that belonged to the Purple Mansion Stage monk instantly fell back and lowered to about the fifth layer of the foundation.

Zhou Yang, the third-level "Golden Cicada Hiding Technique", has not yet fully learned, otherwise his cultivation will not only be reduced to this level, but can be directly lowered to the first level of foundation building.

But even so, seeing that the aura on his body suddenly plummeted so much, and he couldn't find anything unusual after sweeping his divine sense, Ma Shaoyang was still taken aback in his heart.

As a casual cultivator, he didn't know how many times he had experienced fighting battles and life-and-death crises in his life, how could he not understand how valuable this secret technique of concealment was.

If he had this kind of secret technique, whether it was black eating black and pretending to be a low-level monk to attract those sand bandits to rob and kill, or constricting his aura to lower the vigilance of some third-order high-grade demon beasts to sneak attack and hunt demons, it would be a promising thing!

"Is this the essence of the Purple Mansion Family?"

He muttered to himself in his heart, and the look of horror on his face gradually subsided, and the old man really led the way.

And Zhou Yang followed him through the underground cave, but the huge divine consciousness had already been released, detecting the situation in the underground cave.

Under the detection of Zhou Yang's divine sense, the passages of this underground cave were all curved and curved, without any rules at all, and each passage was similar in size and shape.

It's like, it's like some kind of big beast that uses its own body as a drill and burrows it out of the ground.

"It is said that the fifth-order demon beast [Sandworm] likes to drill holes deep underground to find food, and each passage of the underground cave here is irregular and circular, could it be that this entire underground cave is drilled out by a [Sandworm] demon beast when it lived here a long time ago, in order to forage for food!"

Zhou Yang's divine sense swept through the passages, and the thoughts in his heart turned, remembering some of the records he had read, and he couldn't help but associate the reason for the formation of the underground cave with some kind of famous fifth-order demon beast [sandworm] in the boundless sand sea.

Every immortal cultivator in the Boundless Sand Sea Immortal Cultivation Realm has heard of the legend of the [Sand Worm], but it is not very common for people who have actually seen this fifth-order demon beast and come back alive.

Moreover, even if someone claims to have seen a [sandworm], others may not believe it.

You must know that it is a famous fifth-order demon beast!

Who would believe that a Qi cultivation period monk or foundation building stage monk could come back alive after seeing the [Sandworm]?

Zhou Yang also grew up listening to the legend of the [Sand Worm], and he actually had a curiosity about this rumored giant monster beast with a body length of thousands of feet, wanting to see if this monster was really as huge and vicious as the rumors.

However, although he had this curiosity, he would not really go to the "Death Sand Sea" where this demon beast was active to see its true face just to see the true face of the [Sandworm].

Now, if this underground cave is really related to [Sandworm] as he guessed, he can calculate the actual size of [Sandworm] according to the length of each passage.

So in the next trip, while following Ma Shaoyang through the underground cave, his divine sense carefully swept the entire passage, and calculated the actual size of the [sandworm] by comparing the dent marks on the cave wall in the passage.

After comparing all the way in this way, Zhou Yang found that the rumors may not be exaggerated.

Judging from his comparison of the marks in the passage, if this passage was really formed by the [sandworm] drilling underground, then the body length of this [sandworm] was really more than 800 zhang long.

A body more than 800 zhang long, how huge it should be!

Zhou Yang's eyes flashed, and his heart was also full of shock.

After the two of them walked in the underground cave for several hours, Zhou Yang felt that the temperature around him had risen sharply.

And as they moved forward, the temperature became higher and higher, and in the end, without Ma Shaoyang's reminder, he had already discovered the underground fire abyss in his mouth through his divine sense.

It was a flowing river of magma, in which the magma was produced and flowed somewhere, with only a section of about 1,000 zhang long bordering the underground cave.

The [Sandworm] Demon Beast that had hit the underground cave at the beginning seemed to be afraid of the existence of the magma river, and after the passage hit the edge of the magma river, it turned and left at the slightest contact, so that it only formed a long corridor more than 1,000 zhang long on the edge of the magma river.

Zhou Yang didn't know why this corridor could not be melted into magma by the high temperature of the magma river, maybe it was because of the power exerted by the [Sandworm] demon beast at the beginning, maybe it was because the stones that made up the corridor were relatively resistant to high temperatures, none of these were important.

The important thing is that he has already seen the heaven and earth spiritual fire that is suspected of "purifying and extinguishing the green lotus fire".

On the slowly flowing river of dark red magma, a blue-purple flame the size of a basin burned on a black-red stone at a corner bend on the opposite bank of the promenade.

When the blue-purple flame burns, the flame seedlings are raised layer by layer, just like a half-opened blue-purple lotus, blue inside and purple outside, very dazzling.

Zhou Yang looked at the blue-purple flames swaying in the fire, the golden light flashed in his eyes, and the black and white pupils instantly turned into golden red, but he had already turned on the "Leaving the Fire Golden Pupil" magical power.

At this time, he looked at the blue-purple flame again, and saw that the power of the fire spirit contained in that small blue-purple flame was much purer and richer than a fourth-order fire-type demon pill in his hand, and every moment, a large number of fire vein aura in the magma river converged towards the blue-purple flame and was refined by it.

It is precisely because of the endless fire vein aura in the magma river that this blue-purple flame can always burn vigorously, and it can also become stronger and stronger under the nourishment of the fire vein aura.

Zhou Yang knew that if this blue-purple flame was not discovered by himself or other demon beasts, then after an unknown number of years, as long as there was a little chance, this blue-purple flame might be born and spiritually transformed into a special existence "Spiritual Fire Demon".

The so-called "Spiritual Fire Demon", as the name suggests, is a demon beast that is transformed into a spiritual intelligence after being generated by the spiritual fire of heaven and earth.

As long as this demon beast is born, it is almost invincible in a place like the Magma River, and it has a special magical power "immortal body" that all demon beasts and humans envy.

However, this kind of "Spiritual Fire Demon" is extremely rare, even rarer than the seventh-order demon immortal equivalent to the True Immortal of the Tribulation Period, and the "Spiritual Fire Demon" that has been discovered by immortal cultivators in the immortal cultivation world so far is less than a palm.

So Zhou Yang just thought about the information he had seen in this regard, and then he no longer paid attention and swept his gaze away.

His gaze swept left and right along the blue-purple flame, and soon he made a spot under the magma a few feet to his right.

In Zhou Yang's gaze, the power of the fire spirit under the magma was extremely rich, not much weaker than the cyan purple flame, and at the same time, the fire vein aura attracted by the cyan purple flame would most likely sink under the magma and disappear when it flowed through that area, as if it had been absorbed by something.

Seeing this scene, he immediately knew that the fourth-order demon beast "Huolin Beast" in Ma Shaoyang's mouth must be sleeping underneath.

So the golden and red color in his eyes narrowed, and his eyes turned back to black and white, looked at Ma Shaoyang who was standing behind him and said: "Your news is right, it is indeed the Heaven and Earth Spiritual Fire [Pure Extinguishing Blue Lotus Fire], now you can take this Tsukidan and leave, so as not to be affected when I fight with [Huolin***]!"

After speaking, he reached out and patted the storage bag on his waist, then took out a jade bottle containing Tsukidan and threw it to Ma Shaoyang.

This Zhuji Dan was originally purchased by him from Zhang Yunpeng, and he had been storing it in his hands waiting for a certain Zhou family monk to exchange it, but he didn't expect that now it would be cheaper for Ma Shaoyang, an outsider.

Ma Shaoyang took the jade bottle, raised his hand and pulled out the cork, and a strong medicinal fragrance came out.

He just took a look at it, and after confirming that it was genuine, he hurriedly corked the bottle and put away the jade bottle, and then bowed to Zhou Yang with a happy face and said: "Thank you for the grace of the seniors, then the juniors will not bother the seniors to kill the demon and seize the treasure, and the juniors will retire!"