Demon beasts with strong natural bloodlines such as non-Jiaolong, and direct descendants of non-fifth-order demon beasts, when they advance to the fifth order, they must cross the Heavenly Thunder Tribulation and use the power of the Thunder Tribulation to purify and sublimate the bloodline.

The "Earth Dragon Earthworm" is a high-level demon beast that can become a fourth-order demon beast after becoming an adult like the Golden-winged Thunder Eagle, and the bloodline level is quite high, but if you want to be promoted to the fifth order, you also have to cross the Heavenly Thunder Tribulation.

Zhou Yang is no stranger to this kind of demon beast, because when he was cultivating in the foundation building period, he was swallowed alive by an underage "Earth Dragon Earthworm", and almost died in the other party's stomach naan space filled with corrosive acid.

It is also fateful that the culprit who caused him to be swallowed alive by the "Earth Dragon Earthworm" was the parents of the golden-winged thunder eagle that he is sitting on now.

And now, he is going to ride the Golden-winged Thunder Eagle to the place where the "Earth Dragon Earthworm" fell after the catastrophe fell, and pursue the corpses left behind after its fall.

Zhou Yang didn't forget that at the beginning, only a small part of an underage third-order high-grade demon beast "Earth Dragon Earthworm" was lost, so he was exchanged for a Zhuji Dan and 17,000 lower-grade spirit stones.

Later, he inquired about the effect of the "Earth Dragon Earthworm" in many ways, and really let him know some news, that is, it can be used to refine some of the best healing elixirs that can make monks reborn with severed limbs.

The "Earth Dragon Earthworm" itself has the magical power of rebirth with severed limbs, otherwise the "Earth Dragon Earthworm" that swallowed Zhou Yang at the beginning would not have used the tail breaking escape method in order to escape for his life, and directly abandoned nearly a quarter of his body to escape.

Knowing this, the temptation of the corpse of the "Earth Dragon Earthworm" that failed in the tribulation was too great for Zhou Yang.

You must know that when the demon beast is promoted to the fifth order, it has to cross the Heavenly Thunder Tribulation, and it wants to use the power of the thunder vitality in the Heavenly Thunder to help its bloodline achieve evolution and sublimation.

The "Earth Dragon Earthworm" fell when it crossed the Heavenly Thunder Tribulation, and its remnants must have the vitality of the Heavenly Thunder remaining, and the effect of such a remnant corpse when refining the elixir is likely to be stronger than that of the real fifth-order "Earth Dragon Earthworm".

With such a treasure, Zhou Yang naturally couldn't watch it being ruined by a group of demon beasts.

The Golden-winged Thunder Eagle was extremely fast, and it took Lu Xuewei two days to complete the distance, and under its full flight, it only took half a day to arrive at the scene.

Because it was less than three days before the "Earth Dragon Earthworm" crossed the sky and thunder tribulation, when Zhou Yang arrived at the scene, his divine sense swept and he could still feel the residual power of the heavenly thunder at the scene, although there was only a trace of that power, it still made him a little frightened.

"Demon cultivation, it is really much more difficult than humans, this terrifying Heavenly Thunder Tribulation, one of the ten demon beasts that have crossed the tribulation can survive, and it is all God's mercy!"

Secretly sighing in his heart, it was not easy to cultivate, Zhou Yang's divine sense spread with all his strength, and carefully looked for clues to attack Lu Xuewei's demon beasts around.

After searching like this for a while, Zhou Yang found a lot of useful clues.

But instead of immediately following these clues, he continued to expand his search.

Finally, after searching for nearly three quarters of an hour, Zhou Yang finally made a new discovery.

He stopped above a plain-looking sandy field, and with a wave of his hand, a mana-like wind swept through the ground, blowing a large amount of yellow sand aside, revealing a hole in the ground filled with yellow sand.

"It's ......"

Lu Xuewei, who was curious about Zhou Yang's actions and came to watch, looked at the cave, her beautiful eyes flashed with suspicion, and she looked at Zhou Yang with a suspicious expression.

"This is the entrance and exit left by the [Earth Dragon Earthworm] when it burrowed out of the ground. ”

Facing the apprentice's puzzled gaze, Zhou Yang nodded and explained the origin of the cave.

Then his eyes flashed, as if confirming his speculation, and as if he was giving an apprentice popular science, he said to himself: "The [Earth Dragon Earthworm] is only a fourth-order demon beast when it becomes an adult, and if a [Earth Dragon Earthworm] wants to cause the Heavenly Thunder Tribulation to be promoted to a fifth-order demon beast, there must be a great chance to devour some great heavenly and earthly treasures." ”

"Generally speaking, demon beasts have fixed nests, and even if they devour some natural treasures outside, they will return to their nests to digest them. ”

"And when the demon beast digests the heavenly and earthly treasures, its Heavenly Thunder Tribulation will be about to arrive, at this time, can it travel far away from the lair to cross the tribulation?"

When Lu Xuewei heard him say this, her beautiful eyes suddenly lit up, and she couldn't help but say with excitement on her face: "So Master, you mean that the place where this cave leads is where the [Earth Dragon Earthworm] lair is located?"

Zhou Yang bowed his head slightly and said: "Eighty percent may be its old nest, and two percent may be the place where it devours heaven and earth treasures, no matter which one it is, it is worth us to go down and explore." ”

When Lu Xuewei heard him say this, she immediately became even more excited, whether it was the lair of a fourth-order high-grade demon beast, or a place where the heavenly and earthly treasures were born that could allow a fourth-order high-grade demon beast to be promoted to a fifth-order demon beast, it would definitely give them a lot of gains.

And with Zhou Yang's generosity and love for her as an apprentice, as long as there is something to gain, she will definitely benefit from it.

It's just that after she was excited for a while, she calmed down and remembered the reason why she came here, and couldn't help but ask, "But what about those escaped demon beasts?

"This matter is simple, just let the Golden-winged Thunder Eagle follow the traces on the ground, with its strength, it is more than enough to deal with those demon beasts!"

Zhou Yang said, and gave an order to the Golden-winged Thunder Eagle.

His golden-winged thunder eagle had fed the "Enlightenment Spirit Pill" since he was a child, and his spiritual intelligence was much higher than that of many fourth-order demon beasts.

In addition, he had followed Jiang Fengxian's advice at the beginning, and had always paid great attention to the knowledge enlightenment and education of this spirit pet, so that this spirit beast was now able to easily understand human speech and correctly execute orders.

At this time, hearing his command, the golden-winged thunder eagle suddenly nodded at him humanely, and then chased after the traces left by a certain demon beast on the ground with an eagle's cry.

"Alright, let's go down too. ”

Zhou Yang looked at the departing figure of the golden-winged thunder eagle, retracted his gaze and whispered to the apprentice.

After saying that, he immediately pinched the spell and cast the earth escape technique and fled to the ground along the mouth of the cave.

After a while, the figures of Zhou Yang and Lu Xuewei's master and apprentice appeared in an underground passage hundreds of zhang deep.

The sand only filled a small section of the underground passage and exit, and Zhou Yang and the others appeared in this wide underground passage after passing through those blocked areas through the Earth Escape Technique.

"What a rich aura! Could it be that this underground passage leads to a fifth-order underground spiritual vein?"

Lu Xuewei looked at Zhou Yang with a pair of beautiful eyes, looking very excited.

This kind of exploration of the lair of high-level demon beasts is not too exciting for a monk like her, who is usually dedicated to penance at home.

So much so that because of the influence of the exercises, she has never liked words, but now she is like a sixteen or seventeen-year-old girl, full of curiosity and thirst for knowledge.

"It's too early to make a conclusion, although the aura here is rich, at most it is comparable to the third-order spiritual vein, let's take a deeper look. ”

Zhou Yang shook his head slightly, did not make a conclusion, and then moved his steps, and immediately walked quickly along the passage to the depths.

Seeing this, Lu Xuewei naturally hurriedly ran the light body spell to keep up.

In this way, the two of them continued to go all the way deeper, and the concentration of spiritual energy in the passage was getting higher and higher, and finally when Zhou Yang and the others came to the end of the passage, the intensity of the spiritual energy here had already surpassed that of Lingxi Peak, a fifth-order lower grade spiritual mountain!

But Zhou Yang knew that there was no spiritual vein here.

"Spirit Stone Mine, it's Spirit Stone Mine!"

He muttered excitedly, his eyes full of surprise.

He had the experience of discovering the spirit stone mine, that is, the spirit stone mine on the Rhino Horn Continent that had been hollowed out by demon beasts, and he had excavated several high-grade spirit stones in that spirit stone mine.

And now he has discovered the spirit stone mine again in the depths of the underground that he doesn't know how deep he has penetrated!

He exuded his divine sense, and with his powerful divine sense, he could only spread out here for less than a hundred zhang!

This made his heart suddenly even more happy.

Judging by the fact that the larger the spirit stone mine, the stronger the power of divine consciousness suppression, the spirit stone mine in front of him now will definitely not be smaller than the spirit stone mine found on the Rhino Horn Continent at the beginning, and it is even very likely to be a medium-sized spirit stone mine with a reserve of tens of millions of lower grade spirit stones!

"It turned out to be a spirit stone mine! Our Zhou family is also going to have its own spirit stone mine!"

Lu Xuewei's beautiful eyes stared at the pitch-black cave walls around her, and her eyes were full of shock and surprise.

The hollowed-out spirit stone mine on the Rhino Horn Continent has always been a sore spot in the hearts of Zhou Yang and many Zhou family monks.

If the spirit stone mine had not been hollowed out, the foundation of the Zhou family's thousand-year-old family would have been truly solid.

Lu Xuewei is also a high-level member of the Zhou family now, and of course she understands how much a spirit stone mine means to the Zhou family.

Of course, she didn't forget her and Zhou Yang's intentions, and after the shock, she couldn't help but look at Zhou Yang and asked, "Master, how could the [Earth Dragon Earthworm] set up its nest in the spirit stone mine?

"This teacher is not clear, but there is a saying that in those spirit stone mines with large reserves, sometimes there are some extremely rare associated spiritual objects, maybe the [Earth Dragon Earthworm] found this kind of associated spiritual objects in them and devoured and digested them, which caused the Heavenly Thunder Tribulation!"

Zhou Yang shook his head and said his guess with some uncertainty.

Of course, he didn't care much about this matter now, because compared to the spirit stone mine associated with the spirit stone mine that was likely to have been devoured by the Earth Dragon Earthworm, it was more important to figure out the reserves and depth of this spirit stone mine first.

The reserves of the spirit stone mine determine its ultimate value, and the depth of the spirit stone mine determines its mining difficulty.