The underground world does not see sunlight all day long, and it stands to reason that it is good to grow some medicinal herbs that cannot see the light here, but the reality is just the opposite, there are not only many kinds of medicinal herbs here, but also excellent quality.

Although he didn't know what the reason was, Yun Tian knew that if he didn't collect these medicinal materials, he would be sorry that he had come here all his life.

At the moment, the medicinal materials here were swept away by Yuntian and Yunrou, and Yuntian did not let go of any medicinal materials that could be seen.

A few hours have passed, and there are no less than a thousand kinds of medicinal materials in the Hundred Treasure Bags of the Cloud Sky, and each of them is an elixir that is difficult to find at a thousand prices outside, and the deeper you go, the more and more medicinal materials there are, and some of them emit essence light, and even illuminate the dim underground.

Stop and go all the way, stop and go, sometimes Yun Tian and the two will sit down and rest for a while, combining work and rest, and sometimes Yun Tian will go to collect medicinal herbs, and they are busy for a while.

In this way, after three days, the two of them came to the deepest part of the earth, and they were blocked by a cliff in front of them, which was connected to the crust above, and there was no way out.

And in the past three days, Yun Tian's injuries have fully recovered, and there is a tendency to break through to the last stage of manifestation, Yun Rou is more proficient in the use of mana, especially in the three days of Yun Tian, tens of thousands of medicinal herbs have been collected, at least five or six thousand.

The harvest is not small.

"This is the deepest part of the earth?" said Yun Tian, looking at the cliff.

The underground world is not a whole, but scattered, under every crack in the ground, there is an underground world, and now Yuntian has come to the deepest part of the underground, which means that this underground world is only so big, which is also a normal situation.

"Seems so, but I think this cliff seems a little out of the ordinary here, so let's look around and see if there's any access to the rest of the underworld. ”

Yun Rou nodded, and after speaking, she began to look carefully around the cliff. Although the underworld is scattered, there is also a certain connection, which makes it convenient for the three powers of the earth demons to rule the underworld.

"Okay!" Yun Tian also noticed the strangeness of this underground, and in response, he and Yun Rou searched for a crack in the ground leading to other places.

This mysterious cliff is pure granite, so hard and as flat as a mirror that even a gecko cannot climb this smooth cliff, and Yuntian has no intention of climbing it.

Because even if you climb up, you can't get out. If you want to get out, you have to go back the way you came.

Along the way, Yun Tian was even more puzzled in his heart, he found that this granite cliff was like the wall of a house, with sharp edges and corners, and there were many patterns carved in some places, including mountains and rivers, birds and beasts, devils and immortals, and sun, moon and stars.........

"What is this?"

After half a day of hard searching, the two of them finally found a huge cave on the cliff, which was like a portal, and it was pitch black inside, exuding a powerful aura.

Looking at this huge portal, Yun Tian sighed softly, he suddenly found that the divine thoughts had no effect at all in the cave, and his heart was suddenly shocked, knowing that this cave was definitely very dangerous.

"Big brother, I found that my divine thoughts seem to have lost their effect in this cave, do you feel this way?" at this moment, Yun Rou on the side asked.

"Yes!" Yun Tian nodded, "This cave is full of mysteries, but I have a feeling that our final destination in the underground seems to be here!"

Feeling the powerful aura emanating from this mysterious cave, Yun Tian had a feeling of facing Yun Rou Jindan, but now that his injuries were all healed, this aura could not cause much pressure on him.

"yes, I feel that way too. Yun Rou also nodded, and the mysterious crystal appeared in her hand again, this crystal kept shaking in Yun Rou's hand, but the direction did not change, and she kept pointing to this mysterious cave.

Look at this mysterious crystal, take a look at this mysterious cave, ponder for a moment Yun Tiandao: "We are all here, or go in and see what is inside, if you get any treasures, it is the best, if you can't get it, it's okay, just when we have nothing to do with the treasures." ”

It's your own, and whatever happens, it's always your own. It's not your own, even if you try everything to get it, it won't be your own in the end.

Everything is about chance, luck, Yun Tian felt that in this cave, he might get some adventures, so he planned to go in and have a good time.

"Okay, that's what I mean!" Yun Rou nodded, put the dragon-shaped crystal in the palm of her hand, and slowly walked towards the cave with Yun Tian.

The dragon-shaped crystal emitted a brilliant purple-gold light in the dim cavern, illuminating the long distance, just providing a glimmer of light for the two of them.

The four sides of the cave are extremely smooth, but strangely enough, the cave is not the color of granite, but a black, a deep black.

From time to time, an almost gloomy wind would blow in the cave, whirring past their ears, like thousands of hungry ghosts roaring in their ears, so that Yun Tian and the others had to be on guard all around.

The deeper you go, the temperature of the air slowly decreases, and if you take a casual breath, you will immediately freeze into ice crystals, which shows how cold it is here.

However, Yuntian and the others have treasure armor to protect themselves, and they are not afraid of this biting chill at all.

This cave is lifeless, there is no living soul at all, and there is an ancient desolation everywhere, and the arrival of Yuntian and the two has added a rare vitality to this cave.

Just walk, walk, walk, an hour passed, and the scenery in front of Yuntian was still the same, still dark, but the temperature was getting colder and colder.

This cave is not straight, but crooked, Yun Tian has a heart this time, and memorizes all the roads he has walked in his head, otherwise if he encounters the space labyrinth, it will be worth the loss.

The space labyrinth is hard to come across, but it's not a big mistake to be careful.

After walking for more than half a day, the scenery in front of Yuntian finally changed, the originally dark cave turned into a milky white color, and in the air, the fairy aura was dense, if it wasn't in the cave, Yuntian would still think that this was a fairyland.

Stepping into the milky white cave, Yun Tian felt a strong vitality, and after taking a few breaths casually, he found that his spirit seemed to have increased a little, and his heart was suddenly happy.

And Yun Rou was even more powerful, there seemed to be a large vortex that was slowly rotating above her head, and countless vitality was sucked into her body, and her mana was suddenly condensed again.

But at this moment, the mutation protruded, and there was a loud rumbling sound in the cave behind Yun Tian, and the wind roared wantonly, and the violent wind almost blew Yun Tian away.

Yun Tian hurriedly settled down and saw a scene that shocked him.

I saw that the originally black cave behind me suddenly disappeared, leaving only a spatial passage, which twisted left and right, as if it would collapse at any time.

The way back is completely gone!

At this moment, the space passage made a rumbling sound again, as if it would collapse at any time, Yun Tian knew the power of the space collapse, and did not hesitate at the moment, pulling Yun Rou to rush towards the depths of the white channel.

At this time, the two of them had broken off the back road, so they could only rush forward, even if the road ahead was a dead end, they had to go to the competition.

If you stay at the junction of the black and white passages, you will definitely be killed alive by the spatial turbulence.

And ahead, maybe it's a way to live.....