At this time, Yun Fei had already entered the courtyard, and with the closure of the stone gate, the courtyard suddenly became dark, he was calm, and after a long time, he concentrated and looked around.

I saw that there were many passages in it, each of which was circling and tactful, and there was an implied formation in the changes, if it was an ordinary person who came in, it would be really difficult to find the direction, let alone any way out.

As far as Yun Fei's eyes could see, a detailed map of the entire courtyard immediately appeared in his mind, because he only checked what was in front of him with the map slightly, then found his direction, and immediately started to act without hesitation.

According to the original plan, he first decided to walk around the courtyard, and then follow the planned route, so as to check the content of the previous map with the actual one to see if there were any deviations. If all goes well, he'll soon be back at the mouth of the cave.

Even if he can't return to the cave entrance immediately, it proves that the map he studied at the beginning is wrong, and in this case, Yunfei has a choice that is to quickly find the exit and give up the matter of searching the other courtyard, after all, life is the greatest.

All these plans are to buy time, and the earlier the flaws in the original plan are discovered, the more chance of survival, which is an inevitable reason.

So, Yunfei walked forward, not daring to delay time at all.

The passages along the way are very dark, and Yun Fei has to take the initiative to adapt from time to time, but fortunately, with his skills and night vision, he is enough to see the details.

However, if it is at night, no matter how powerful it is, it is difficult to see things clearly, which is why the old man Tianji arranged for them to enter the other courtyard at ten o'clock in the afternoon.

The channels are basically the same size and shape, almost unrecognizable. In the middle, there are some spacious places, as if it were a hall.

Yun Fei walked very quickly, and he didn't even need to look at it, as long as he walked from memory, he walked for about half an hour before he stopped, and at this time, he looked at it and really returned to the stone door at the entrance of the cave.

He was overjoyed, smiled, and thought, "This first step went very well, and the second part should go to see that secret room." ”

At that moment, he turned around and ran into a passage, and after entering the door, the terrain of the passage rose sharply, and it was always oblique upward. Not far after he entered, he immediately felt a bitter cold, and the cold was a little unbearable.

If ordinary people are in such a situation, they must not be able to stand up, and they may freeze here, or they can only retreat. For Yun Fei, it's okay, because the current level is similar to the previous level in the Ice and Fire Array, not to mention that his skill is much higher than then.

Soon after, he came to a small narrow door, and when he looked inside, he saw that the inside of the door had sunken down, and it turned out to be an empty pool. To its right, on a lower ground, there was also a pool, now filled with water.

Yun Fei had heard from the old man of Tianji before that there was a piece of warm jade in the pool above, and because it was extremely cold here, once the pool above was filled with water, it would immediately condense into ice.

That piece of 10,000-year-old warm jade can melt ice, but the time is very slow, and the water in this pool needs to wait for ten years to melt before it can turn into water and flow into the pool on the next layer of the road.

The stone gate in the courtyard, when the ice condenses in the previous pool, it will press the mechanism, and it is difficult to open the door even if the gods are outside, and it will not be able to open the stone door until ten years, when the ice completely melts into water. Now the pool was still empty, and after Yun Fei saw it, he felt a little strange, and jumped to the bottom of the pool to check.

I saw that the pool was about two zhang square, and the bottom of the pool was full of dark stones, but it shimmered faintly, which was quite smooth. At this time, there were still some water droplets hanging on the surface of the stone, embedded with a thin layer of ice, which had not yet completely melted.

Yun Fei took a few steps, only to feel the strange cold in this pool, as if his whole body would freeze at any time, and even his blood was about to coagulate, and he couldn't help but be secretly frightened in his heart.

Another question that made him a little difficult to open, that is, the ice here has all melted, but there is no water to slip in from other places, and then this stone gate will not have a mechanism?

He walked a few more steps, and suddenly felt something abnormal in his doubts, he wondered and tried to feel it with his feet, at first he didn't understand, but then he finally felt it, it turned out that there was no ice on the ground, and the cold feeling suddenly disappeared, and he realized that the bottom of his feet should be the piece of warm jade.

With curiosity, he squatted down, and there was a mutton fat white stone at his feet, about a foot square, emitting a warm light, and he reached out and felt a little warmth. In this piece of coldness, these soft warmth make people feel infinite warmth and affection.

Yun Fei felt that he was surrounded by gentleness, and he couldn't help but feel a strange comfort in his heart, he rubbed the jade with his hand, getting harder and harder, and suddenly felt that the stone could move, so he tried to hold it.

Who knows, just as he picked up the jade with all his might, he almost stumbled to the ground, it turned out that the weight of the stone was extremely light, and it did not look like a hard stone.

He put it in front of him, turned around to look, and then realized the reason, it turned out that the jade was hollow, like a square box, and the box was empty.

When he was puzzled, he suddenly realized that the stone did not have any temperature, and when he hurriedly looked down, a dark bamboo appeared on the ground, and the top of the pillar was a lotus stone seat, and a palm-sized jade stone was placed on the lotus seat.

In the dark, this piece of jade is like mutton fat, held in the palm of the hand for a long time, but it faintly transforms into a red color, exuding a breathtaking brilliance.

Suddenly, just as he was picking up the jade, a "boom" sound immediately rose, and he only heard that there seemed to be thousands of troops and 10,000 horses, and they came to the front in an instant.

Yun Fei instinctively jumped up in an instant, just when his feet just landed on the edge of the pool, the sound of thousands of troops and horses galloping already knew what it was, it turned out that a spring water was instantly poured into the pool, and it came very abruptly, in the mountain, in the galloping echo, so that the momentum was extremely powerful, as if thousands of troops and horses rushed to kill and gallop!

When the spring water fell into the pool, it was filled with no more and no less, and the sound immediately fell silent, and no more spring water flowed out.