So, between the roots of the tree, the two of them continued to walk forward. Although the light became darker and darker as he walked forward, Zang Feng never felt stuffy, but felt that he was breathing more smoothly and his mind was clearer than before!

So, Zang Feng asked Bingshuang: "There is no breathing ginseng here, and I can't see anything, but how do I feel that it seems that my breathing is smoother and my mind is clearer than just now?"

Frost said: "At that time, because of this, there was no lack of oxygen! You think, in the mobile labyrinth before, there were so many breathing ginseng, and the amount of oxygen released was extremely high. And the air flow in the moving labyrinth passed through the entrance of the secret room and penetrated here. Naturally, there is no lack of oxygen here! Moreover, the oxygen content here has been reduced by the filtration of the tree roots, so you will naturally not get drunk with oxygen because of the excessive oxygen content, or even hallucinate! Therefore, you are more sober!"

Zang Feng listened and said, "I see! So, the oxygen in the secret room in front of you also penetrated through the moving maze? Moreover, the secret room won't be as dark as here, right?"

Frost said: "Of course, oxygen also penetrates from here! Because, in our secret room, there is not even a single breathing ginseng plant! However, in the secret room, it is not dim, don't worry! Let's go!" As he spoke, Frost took Zang Feng and circled to the left.

However, perhaps because Zang Feng saw that it was still dark in front of him, he somehow became worried, and asked a little worriedly: "Ahh

Bing Shuang said: "That's right! Because, this is also a defense mechanism of our secret room! Because, if there is really a foreign enemy, rush through the mobile maze and enter the secret room, there will immediately be a moving rock wall in the maze to block the entrance, so that the intruders can enter but can't get out!"

Zang Feng listened, thought about it in the dark, and said: "After the intruder enters the secret room, if he is inside the labyrinth, he will partially close the Qimen Dunjia. After moving all the rock walls in the maze back into place, won't the rock walls that block the entrance leave?"

Bing Shuang said: "Then it also depends on the intruder, before the oxygen is exhausted, whether they can find the right switch to partially shut down Qimen Dunjia! Even if the intruder finds the right switch, he doesn't know how to move the rock wall blocking the entrance, and he doesn't know how to move the rock wall away, and he will suffocate to death after all." Alright, we're almost there, let's hurry forward!"

So, after turning a few more corners, Zang Feng suddenly realized that the surroundings were not as dim as before, as if he didn't know where to go, faintly emitting a dark blue light. Gradually, even the roots of the trees in this dark passage have been reflected in blue. So, under the blue roots, the two continued to shuttle, and after a few more turns. Suddenly, Zang Feng felt a sudden light in front of him, and the front suddenly opened up, only to see a square area, which finally appeared in front of his eyes. Zang Feng finally discovered that the blue light before was reflected from this square space.

Zang Feng immediately asked in surprise, "Frost Girl, this is the secret room of our Medicine Immortal Sect?"

Frost said, "This is exactly here!"

After Zang Feng was convinced, he immediately stood still, carefully examining the secret room.

It turned out that the rock walls on the left and right sides of the secret room seemed to have been artificially carved into the shape of bookshelves. And the stone bookshelves on these three rock walls are densely packed with books. Zang Feng, who watched it, couldn't help but feel a little dizzy for a while. And in the middle of this secret room, there is also a stone table. On the stone table, in addition to a square wooden box, there is also a picture scroll, which is being spread out on the table. Zang Feng looked at it from a distance, only to feel that the picture scroll was agile and elegant, and it seemed as if there were water ripples moving on it. Zang Feng knew at first sight that this was the detailed map of the 'Four Great Continents' of his 'Medicine Immortal Sect'. It's just that he doesn't know how this picture scroll is here!

But at this time, Zang Feng had no time to think about this. Because at this time, what surprised Zang Feng the most was the top wall of this secret room. Because, the blue light in this secret room, and even the smart water ripples on the picture scroll, seem to be reflected from the top wall of this secret room. Zang Feng couldn't help but look up, and under one room, he was even more shocked!

It turned out that Zang Feng saw that on the top of the rock wall, although it was as dim as the night sky, it was also clearly visible, and countless fish, large and small, were swimming in it. And one of the biggest fish was the white dolphin that dragged Zang Feng and Frost from the bottom of the water to the 'secret passage entrance' at the bottom of the well! Moreover, Zang Feng's line of sight was still faintly visible through these schools of fish, as if there were several birds flying and soaring. And from time to time, the beaks of these birds also flash blue light. Therefore, it is these lights that make this secret room so bright. At this moment, Zang Feng couldn't help but be shocked, and secretly thought: "Could it be that those flying birds are those snowy divine birds that are guarding our Medicine Immortal Valley?"

So, Zang Feng hurriedly asked Frost, "Frost girl......?" Where the hell is this?"

Frost said, "This is our secret room?"

Zang Feng looked up at the top wall and asked, "Can ...... But how did you see that white dolphin? And is that our snowy bird?"

Frost arrived: "That's the dolphin that was pulling us underwater." And that shining one is also the snowy divine bird of our Medicine Immortal Valley?"

Zang Feng couldn't help but exclaim again: "Ahhhh

'Frost' smiled and said, "This is the bottom of our Mirror Lake in the Medicine Immortal Valley! The secret room of our Medicine Immortal Sect is deep at the bottom of this lake!"

When Zang Feng heard this, he was even more shocked, and shouted: "Ah! The disciple was tied up by the Frost Girl on the shore of Mirror Lake for more than a month, but I really didn't expect that there are still so many secrets hidden at the bottom of Mirror Lake of our Medicine Immortal Sect!"

'Frost' smiled: "Now I know, it's not too late! Moreover, after the white dolphin dragged us to the entrance of the secret passage at the bottom of the well, you should also think that this underground secret passage is not far from the mirror lake at all!"

Zang Feng also suddenly realized through the hint of frost: "Yes! The dolphin that pulled us before, dragging the two of us, saw that it was about to take us across the waterfall and into the bottom of Jinghu Lake, but it suddenly turned around, and after seven turns and eight circles in the darkless underground water system, it brought the two of us to the entrance of the underground passage at the bottom of the well. Thinking about it this way, this underground tunnel system should naturally be not far from Mirror Lake!"