It's just that based on the unpleasant musty smell in this alone, it can be roughly inferred that no matter how much space there is, no one has been in or out for a long time.

It can even be concluded that this circular portal must have not been opened for a long, long time.

In other words, there should be no one living in this hidden cave, at least for now, otherwise this will never happen.

You know, it's been at least two quarters of an hour since the portal opened automatically, and it's in the open mountains again, and tonight the mountain wind hasn't even dissipated the musty smell inside, so you can know how bad the situation must have been earlier.

Needless to say, this place must have been completely sealed for a long time, and it should be absolutely impossible to be inhabited. It's just that in this way, the things that make Yun Zaiyuan incomprehensible come out again, who opened this secret portal.

Could it be that he opened the small stone box at random just now, which triggered the opening of this secret portal? Or is it the old man in Tsing Yi just now?

In fact, he didn't leave at all, but he had been hiding somewhere nearby and secretly observing himself, and deliberately waited until he was opening the small stone box, and then he deliberately lost no time in opening the secret portal above, specifically to stimulate his curiosity and lure himself up to find out.

In this way, it also corresponds to the strange words that the old man in Tsing Yi said earlier. Didn't he just say that he was entrusted with loyalty, and he dared to love him, so he deliberately set up a puzzle step by step, luring himself into the hidden cave above.

In addition, maybe even the pair of spotted flying leopards should be an important chess piece for him, but he didn't break it well.

In this way, the front and back are smoothed out, and it seems to correspond naturally.

Anyway, at least one thing is certain by now. That is, regardless of the other party's intentions, but at least he should not have too much malice towards himself.

Because if he really wanted to harm himself, then he wouldn't need to go into such trouble. As early as when he was fighting fiercely with the pair of spotted flying leopards, as long as the other party made a slight sneak attack on the side, I am afraid that he would have already folded under the sharp claws of the pair of spotted flying leopards.

Not to mention, the real kung fu of the old man in Tsing Yi should definitely be far above himself, even if he is an upright opponent, he will never be spared.

Thinking of this, Yun Zaiyuan was instantly relieved, and he was no longer as anxious as he was just now. Simply flip directly in the air, and easily drill into the circular hole below.

Due to the relatively dark light inside this cave, although Yun Zaiyuan's night vision skills are good, it is still not very convenient after all.

In addition, now that Yun Zaiyuan has concluded that it should be safe based on the previous analysis, he has relatively calmed down.

So he still held a few small pebbles in one hand, ready for some unexpected situations that might arise inside, but with the other hand, he calmly took out the fire fold from his arms, and with a light stroke, his eyes suddenly became much brighter.

After entering the small round hole, Yun Zaiyuan immediately found a downward shaft passage, and jumped directly without hesitation.

Fortunately, the shaft passage is not very deep, and it is only about seven or eight meters.

Once the bottom is reached, a descending ramp to the north appears.

Although the space in this is very small, and you can barely walk down half-squatting, of course, it is not difficult for people to be in the abyss.

At this time, according to Yun Zaiyuan's rough calculation, that place should be in the mountain behind the boulder, and no one dared to imagine what the situation would be inside.

However, when Yun Zaiyuan really walked in, he was really shocked, what he definitely didn't expect was that it was just a small room, at best four or five square meters.

I saw that it was roughly a regular cube, which looked square at first glance, but when I looked closely, I found that its top was slightly uplifted, and the periphery was also very rounded.

Looking around and on the ground, except for the entrance he had just entered from the south, it was all extremely smooth planes, and it was impossible to tell whether it seemed to be a natural formation or deliberately chiseled and polished.

It's just that some subtle patterns can be seen at the top, and after careful identification, it looks like the starry sky star pattern that Yun Zaiyuan studied with that one-horned dragon in his early years.

In addition, it is particularly worth noting that in this small stone room, there is also a simple desk the size of an ordinary desk made of three bluestones, and a bluestone stool with a round drum style, so that the underground situation is naturally not very clear.

On top of the simple stone table, there was only one stone that looked like it should be an inkstone, the size of an ordinary person's palm, and at first glance it was an ordinary local stone, but there was a small depression in the middle.

In addition, I don't know if it's really a long time, or if no one really uses it as an inkstone at all, anyway, there is no trace of ink in it.

Later, after Yun Zaiyuan searched seven or eight times, he still didn't find anything.

At this time, he began to be a little impatient again, and sat down on the stone bench unceremoniously, and inadvertently reached out to grab the broken stone inkstone, which was originally just an extremely ordinary action.

However, who would have thought that at this moment, a miracle appeared, the small inkstone seemed to have taken root, and Yun Zaitian did not catch it at once.

At this time, Yun Zaiyuan secretly thought to himself, "What is the situation, could it be that the entire stone table is one with the ground below?" Supposedly, according to his current skills, let alone grabbing the inkstone gently, it is estimated that even if it is crushed and rubbed all at once, it is estimated that it will not be a difficult task. ”

Sure enough, after not catching it, Yun Zaiyuan suddenly became a little anxious. I saw that he was struggling with his arms, meaning that he really wanted to lift the stone table for it.

It's just that what he didn't expect was that he didn't lift the stone table as he wished. It was only at this time that he knew that this seemingly ordinary stone table was really another mystery.

Sure enough, after trying several times repeatedly, Yun Zaiyuan finally discovered that the mystery in this was actually on the inconspicuous broken inkstone.

Then, he sat on the stone bench and tried to move the broken inkstone up and down, left and right, and then the unexpected happened again.

Just as he pressed down with internal force and rotated back and forth, suddenly an extremely subtle sound came from behind him, and a secret door appeared on the stone wall behind him.

In this way, after continuing to move forward for another twenty-five or six meters, Yun Zaiyuan finally saw a relatively spacious space in the distance ahead.

I saw that there were three ancient seal fonts at the top of the entrance, and Yun Zaiyuan roughly smoothed it out, and it was basically determined that it should be the three characters of the Hun Stone Palace.

There, he found a letter that was not sealed.

It was this letter that made Yun Zaiyuan finally understand everything, and it turned out that this letter was specially left by Gu Yun Zhenren to him, a disciple of the next world.

In this letter, Gu Yun Zhenren systematically told everything, he not only explained the ins and outs of this Xuanxuan Cave in detail, but also gave a corresponding overview of his early years.

Of course, the most important thing is the three strange spaces in this Xuanxuan Cave, which were named by Guyun Zhenren himself - the Palace of Bliss, the Hell Gate and the Xuanzhen Space.

It was only at this time that Yun Zaiyuan finally understood what was going on. It turned out that all this that happened tonight had already been calculated by Guyun Zhenren more than a hundred years ago.

As for the pair of spotted flying leopards, they are also specially used by people Guyun Zhenren to test whether they are qualified; As for the unfathomable old man in Tsing Yi that he saw tonight, he was specially waiting here to pick him up.

And it was he who deliberately lured himself here little by little, allowing himself to successfully enter this hidden cave, and the small stone box was precisely the key to opening this secret cave.

Although all this tonight seems to be able to reluctantly correspond, Yun Zaiyuan is still a little extremely confused, that is, the one-horned dragon that has no head and tail in the past, what is going on with him?

Now it seems that he is definitely not a simple stranger, but all this, even in this letter, there is not a single word, maybe all this, only the one-horned dragon himself really understands......

After truly understanding the letter from Gu Yun Zhenren, Yun Zaiyuan quickly took out the small stone box from his arms again, and carefully took out the silk book from it.

Sure enough, the font in this silk book should be the same as the font in the letter just now, and it should be the handwriting of that Guyun real person.

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