After walking another seven or eight hundred meters along the valley road, a rock wall that towered into the clouds and could not see the true face of the top appeared in front of Yan Yun's eyes, blocking his way.

The rock wall is almost 90 degrees vertical, there is no possibility of climbing and climbing, fortunately, when you get closer, Yan Yun found a quaint cave, because it is covered by the dense green vines hanging down from the top of the rock wall, if you don't look closely, it is really difficult to find the existence of the cave.

When I came to the bottom of the cave, I looked up and saw that Long Feifeng was engraved with three blood-red characters, but it was a pity that Yan Yun was almost illiterate in this world, and he couldn't recognize what was written on it.

The cave was pitch black, nothing could be seen, and from time to time there were gusts of wind blowing out, but it was cold and piercing, which made people feel creepy.

According to the current analysis of the situation, it is possible to cross the valley of death only through the cave of Tongguò, and it is a dead end to retreat anyway, so it is better to choose to give it a go.

So Yan Yun didn't think much about the danger he might encounter, took out the fairy sword and walked towards the cave, with the light of the fairy sword itself, he could also roughly see the situation in the cave.

Who knew that after walking more than ten steps into the cave, it seemed that there was an invisible screen blocking Yan Yun's way, he reached out and touched it, and instantly sensed strong resistance, and in surprise, he put his arms out together, and pushed forward violently, and was immediately shocked back by a mysterious force, and fell to the sky.

Yan Yun was unwilling, got up, exited the cave, and then started to accelerate, intending to use his strong brute force to break through the invisible barrier in one fell swoop, but as soon as his body came into contact with the invisible barrier, all his brute force sank into the sea like a stone, dissipated, and that mysterious power was born again, this time it shook him out of more than ten meters and fell out of the cave.

What made Yan Yun's heart palpitate was that the moment he was shaken out, he clearly felt that his internal organs were also followed by a huge shock, as if they were about to crack.

Needless to say, the invisible barrier in the cave has a mysterious and unpredictable power, and when it encounters an external force, it will give birth to a rebound force, and it will be stronger when it is stronger.

Such a thing was something Yan Yun didn't expect to say anything, the huge earthquake just now is still fresh in his memory, if he tries his best to impact the invisible barrier again, it is difficult to guarantee that he will not be torn apart and lose his life.

"Damn! Again, do you dare to have something fresh? Yan Yun shouted dejectedly.

He didn't understand why it was always like this, just seeing a little hope, and then suffering a fatal blow that caused the light of hope to be extinguished in an instant, and he fell back into the abyss of despair.

Although he only suffered some flesh and skin physically, Yan Yun was lying on the ground, looking at the sky, and he didn't bother to get up.

He didn't know who he was gambling with, thinking that he would still fall after getting up anyway, so why bother getting up so much?

However, after the frustration, after all, we still have to face the actual situation, and if we work hard, there is still a chance of life, so we will compromise and give up, and there is only a dead end 100%.

Breaking through layer after layer of difficulties, it has been difficult to support to this point, Yan Yun said that he was not reconciled to anything, so he sat up against the mountain wall, rested for a while, and after calming down, his brain began to work rapidly.

There is a mysterious power hidden in this cave that cannot be resisted by manpower, and there is almost no hope of breaking through this barrier, so the only thing left for Yan Yun is to turn back, and there is no other choice.

But turning back means finding a way to deal with those hateful-looking half-turtles and half-clams.

Taking out the white silk bag, Yan Yun found those mysterious and weird yellow charms, in his opinion, since those charms are the magic weapons of the immortal family, they must not be fake props used by the gods to catch ghosts and drive away evil spirits, but have different uses, which can be seen from those pills with different effects.

After observation, the spells drawn on the yellow charms were not completely consistent, and they were roughly divided into nine types, which seemed to indirectly fulfill Yan Yun's conjecture, and each spell had its own use.

Of the nine types of charms, five have the largest number of charms, while the other four are very rare, with only two or three spells and only one that is unique.

The so-called scarcity is expensive, Yan Yun has figured it out very well, the first five kinds of charms must be far inferior to the last four regardless of their efficacy and power, in other words, those five kinds of charms are of a lower level and belong to ordinary ordinary magic weapons, and the remaining four are higher levels, which belong to the treasures of the immortal family.

It's a pity that Yan Yun doesn't know the strange spells on the nine kinds of charms, and he doesn't know what the uses of these charms are, let alone if they can help him get out of danger.

Because the fairyland is mysterious and unpredictable, little is known about it, so Yan Yun has always been cautious in what he does, reserving his eyes in case of any irretrievable disaster.

If he didn't think about it and opened his mouth to eat the pill indiscriminately, even if he didn't die, it would be better to die than to die.

So in the process of studying the nine kinds of charms, Yan Yun first put the other four charms back into the white silk bag, he was worried that the power of those high-level charms was too strong, and the stability was not high, and there was a risk that they would be uncontrollable or destructive beyond imagination after urging, and they would probably let themselves suffer at that time.

The emperor lived up to his wishes, and after some careful speculation, Yan Yun actually really had some unique understanding of the five kinds of charms.

When he first saw the spell on the spell, because it resembled a form of writing, Yan Yun naturally regarded it as a kind of writing that he had never seen before.

But then he found that if he put aside the form of words and felt them with a more intuitive and straightforward mentality, those dense spells were more like a subtle illustration than words.

Some of the spells are mostly in the form of waves, like the surface of sparkling water, some of the spells are in the form of clouds, like bundles of enchanting flames, and some of the spells are like countless stretched capital letters "N", which is the spectacle of thunder and lightning falling from the nine heavens......

Guessing this, Yan Yun roughly understood, and ten of them can be sure that these five kinds of charms should be the spirit runes of the five attributes of "wind", "thunder", "water", "fire", and "earth", and the attributes they belong to determine the unique effects that they can play.

After figuring out this, Yan Yun was relieved and at the same time, his heartstrings also tightened, because he had to face the last and most critical problem next.

How do you activate these spells with different attributes?

According to the description in the Xianxia TV series or the famous Xianxia book, to urge these spells, you should need to control the magic or Indian style that urges them, and Yan Yun has nine out of ten tricks for these things, and he can't understand any of them.

took out a wind attribute spirit rune, anyway, there was no one around, Yan Yun was not afraid of being embarrassed, so he pinched his sword fingers and jumped up the big rope, what heavenly spirit spirit and earth spirit spirit, what Taishang Laojun is as anxious as the law, and even the common mantras such as "all the weather is swinging, my road is prosperous" in the legend of Sword and Fairy have also been tried, but unfortunately all efforts are in vain and in vain.