Stepping into the river, Ao Che braved the pressure of the river and swam upstream.

The color of the river is a deep red, even faintly black, as if it has a feeling of stagnant water.

Suddenly, a huge figure obscured the river, and Ao Che looked up sharply, only to see a fragmented three-dimensional scene projected over the river. A blue dragon was roaring to the sky in the wind and thunder, and the sky, with the wind, thunder, rain and fire, turned out to be a catastrophe. And there are several powerful immortals standing in the void around it, taking advantage of the dragon's tragedy to besiege it.

The scene is incomplete, half sparkling and vivid, half obscure, but it is still thrilling to watch.

Ao Che couldn't help but gasp as he looked at the long clouds projected over the river.

"The clouds cover the sky and cover the sun for 30,000 miles, and the immortal tribulation recorded in the history books is not of such a scale. Could it be that this giant dragon is crossing the immortal king tribulation? is it an immortal king who is about to be born?"

"But there is no immortal king in the history books whose body is Canglong, when is this image?" Ao Che was puzzled.

"Pale blue dragon scales, could this be the legendary primeval dragon. ”

Ao Che suddenly thought of a fragment of the "Ancient Biology Record" in the school palace. It records a kind of primeval dragon, known for its powerful physique. But the content of this book is not verifiable at all, and is more considered a kind of fabrication. And Ao Che didn't expect that he actually found a record of the existence of the suspected primeval dragon here, a living primeval dragon was crossing the immortal tribulation.

"It is rumored that the ancient Canglong is physically strong, and can crush many immortals in the ancient period with one enemy and more sacred, and the scene of the Canglong fighting the Quartet with strength in the image seems to be right. ”

Although Ao Che had some guesses, he didn't dare to be completely sure. But no matter what, this kind of Immortal King Tribulation and Immortal King battle is a rare opportunity for him to understand. Ao Che retracted his mind, and Ao Che put all his mind into the image.

The wind and thunder suddenly accelerated, as if provoked by the dragon's long groan, and one after another thunder and lightning slashed down and applied it to the dragon. But the giant dragon was not afraid, but opened a huge dragon kiss to the sky, roared angrily, and then Yu Lei confronted the fairy king of the four directions, domineering and obedient.

Finally, swim up, stab, look back, sweep tail, strike angle, claw strike...... The dragon fought on all sides one by one, and although it was under siege, it still seriously injured its opponent.

Each movement was simple and distinctive, and the power of the burst was unmatched, as if he could tear the sky and shatter the stars with a turn of his head and a swing of his tail.

In the end, the immortal king tribulation passed, and Canglong's qi suddenly skyrocketed, and several immortals who were besieging retreated one after another, but they were all torn apart by Canglong, who was successfully promoted to immortal king.

This is the end of the image, and then it starts again. Ao Che watched it again, savoring it carefully, and suddenly he watched the dragon's movements, and his eyes gradually widened.

"This, this is ...... Xianwu!"

Practicing qi and martial arts, both of which are ways for mortal beings to become immortals. The cultivation after becoming an immortal is also roughly divided into these two categories, but the qi practiced by the immortals is immortal qi, and the martial arts practiced by the immortals are immortal martial arts.

But after ancient times, most of the immortals and martial arts were cut off from inheritance and gradually declined. In today's Three Realms, cultivating immortal qi has become the only way to cultivate immortals, and almost all methods of cultivating immortals are methods of cultivating qi. Even the Dragon Palace of the East China Sea also uses the Qi training method to build the foundation of the Immortal Dao, and this Qi training method is the "Dragon King Zhenhai Tianjing".

Ao Che felt that he had great luck at the moment, and he was actually fortunate to meet a complete immortal martial art.

Even the profound East China Sea Dragon Palace does not have a complete set of immortal martial arts, which shows the preciousness of the immortal martial inheritance. And if Ao Che can obtain this immortal martial arts, not only can he cultivate one more way, but also have one more hole card, not to mention that in the same realm, immortal martial arts can often have more than one enemy, which can't help but make Ao Che even more excited.

Ao Che carefully observed the dragon's posture and power skills, and found that the blue dragon used the dragon's body as a strong bow, and the body curved as if tightening the bowstring to tighten the strength of the whole body to a point, and then the body opened as if releasing the bowstring, knocking the power out.

This kind of power technique looks really simple and crude, but it is powerful. Each of the dragon's swims, stabs, looks, tails, horns, and claws strikes...... All contain such laws.

Ao Che danced the body of the green dragon and began to imitate these movements, but then he found that the dragon's forms seemed simple but in fact extremely crude, and he couldn't imitate them, because every movement exceeded the limit of what he could do. If you do it forcibly, you will only break your bones, twist the tendons, and hurt yourself.

"Is this dragon really the legendary primeval dragon, it actually has such a terrifying physical quality, it is simply beyond the scope of a normal dragon clan! Even Grandfather Wang can't do these actions!" Ao Che exclaimed.

"And this set of immortal martial arts is really too perverted, the physical fitness of the normal dragon clan can't be used at all, even if I observe it carefully, I can't learn it. ”

However, he didn't give up, the fundamental reason why Xianwu couldn't learn was that his physical fitness was not enough, maybe he could find other images here, and find some refining methods to improve his physical fitness.

Ao Che continued upstream, and sure enough, he found other images. One of them is a scene about Canglong's cultivation of immortal martial arts. This is the image of Canglong when he was a child, he had to forge his body in twenty-eight postures that were difficult for ordinary people to do every month, open up the limits of his body, and supplemented by a large number of pills, and finally it took hundreds of years to get started with immortal martial arts, which was still based on the fact that Canglong's own physical fitness was terrifying.

Ao Che carefully wrote down the twenty-eight forms of forging the body, as well as the elixir prescription, and it was not until this moment that he could be regarded as having completely mastered the inheritance of an immortal martial art.

Although the conditions do not allow it now, there is no way to make pills, but Ao Che can still practice this twenty-eight body forging style to improve the strength of his body.

Ao Che stayed here for a long time, and then headed up the river again, but now the upper reaches became more silent, and Ao Che only swam a little distance, and felt like he was going to drown in the river. It was as if the river ahead was dead and silent, not allowing any living creature to tread it.

The road ahead was over, and Ao Che turned back to the original path, back to the original starting point.

At this time, Ao Che found that his exploration of the foreign river did not have the same effect on the size of the river as the stream on the right.

Ao Che felt fortunate that this would help the creek resist the erosion of the river and not be swallowed up.

Since Ao Che didn't know how to get out of here, he simply stayed in this space and practiced the body forging method, lance attack, and water spell he had obtained.

And as time passed, after the two rivers gradually calmed down and stabilized, an external force suddenly appeared in the space, sucking Ao Che away.

......

Prefecture-level cave, 癸号洞府中.

In the cave, the young Jiao who had been inoculated with the ground-level reagent were still asleep, but a few young Jiao could no longer withstand the repulsion of the reagent and exploded to death, and the corpse was lying on the ground, blood flowing all over the ground.

And in the corner of the cave, Ao Che was the first to wake up with his eyes.

Ao Che first looked around, then focused on himself. The scorching rejection reaction after inoculating the ground-level reagent in the body has ended, and the balance of the power of the original Qinglong bloodline suppression reagent has been broken again. This time, the powerful power carried in the ground-level reagent suppressed the Qinglong bloodline to the corners of the body.

However, although the Qinglong bloodline was in a weak position, Ao Che could still feel that it had become stronger than before. And he didn't do anything during this time, the only thing that could have caused such an outcome was that he explored the bloodline in the dark space.

Perhaps, this will prove that his explorations in the bloodline are real, not imaginary dreams.

Ao Che even remembered what he had seen in those two rivers of blood, whether it was his father's blow to the spear, the battle between his grandfather and the Golden Buddha, or the primeval dragon crossing the robbery to become an immortal king...... These scenes can be clearly brought to mind.

Thinking of this, Ao Che was faintly excited. He has gained a lot of observations and insights in the long river of bloodline, which even contains a set of immortal martial arts, and most importantly, he seems to have touched some incredible mysteries in the bloodline.

Ao Che thought in his heart: "These two rivers should be the manifestation of the two bloodlines in my body. That creek is my own green dragon bloodline, and the invading river should be the bloodline produced after inoculating the reagent, and it is related to the legendary primeval dragon. ”

"Perhaps, next time he will have a chance to enter those two rivers of blood and continue to explore. ”

"But what kind of experiment is the ephemera cave doing? It has something to do with the legendary primeval dragon. ”

Ao Che finally put down the doubts in his heart, and now he can't find the answer. Ao Che turned to cultivate the Blood Xuan Sutra, and he had to continue to exchange blood and exchange the reagent power in his body back to the Qinglong bloodline.

......

Time passed slowly, and more than a month has passed since the vaccination of the prefecture-level trial.

By the time Ao Che finished the exchange of blood again, the prefecture-level test was nearing the end. The entire cave was littered with corpses lying on the ground, and blood spilled almost all of the ground.

Ao Che turned his head to look at the young Jiao who had come in with him beside him, and he had now turned into a silent corpse.

Ao Che still remembered that he was still a high-spirited Jiao Tianjiao a month ago, full of confidence in passing the prefecture-level test, and had the ambition to become a strong man, but at this moment he was lying quietly here, never able to get up.

In this brutal and bloody mayfly cave, the life of the test subject is even lower than that of grass mustard. Even if they were lucky enough to survive the scatter-level test and become the Jiao Clan's Tianjiao, they were just relatively high-level test subjects, and their lives could still be lost at any time.

In addition to Ao Che, there were two other young Jiao in the cave that survived. They woke up one by one shortly after Ochher woke up.

A few days later, two prefecture-level warlocks reappeared in the Cave Mansion to check the final results.

One warlock recorded, "Of the twenty-five new test subjects, three have survived. ”

The other warlock nodded, "Well, less than ninety percent of the young Jiao died, and it seems that the quality of this batch of test subjects is good." ”

Then, the warlock stepped on the blood all over the ground to the center of the cave, and smiled at the surviving young Jiao, "Congratulations, you have successfully adapted to the earth-level potion and survived and become a real earth-level test subject. ”

Among the corpses on the ground, the warlock smiled like a demon.