81_81900 Today's underground world is completely covered by this disc-shaped sunken space, and there is only one direction, and there seems to be a towering mountain peak, Yun Tian realizes that I am afraid that the mountain has a very special position in the living space of these people, and only by entering that mountain can it be possible to find something different.

However, the distance from here to the mountain is too far to know whether the space here will change differently with time, such as the alternation of day and night. For the Yiqiē Yuntian here, he still feels a little unpredictable in his heart. Therefore, although he could quickly reach the peak of the mountain if he spread his wings, although the sky here was always dark, the white wings would be particularly obvious in the air, so Yun Tian thought for a long time, but still did not summon the wings, he just walked along the ravine alone, first running towards one of the disc-shaped sunken spaces.

When he approached the disk-shaped sunken space, Yun Tiancai realized how huge these disk-like spaces were.

Under the disc, it can be judged that the subsidence space of each disc type is at least a thousand meters in diameter, and the height of the disc edge should be nearly 100 meters. This material is also supposed to be a stone, but it can't be named.

However, at this time, Yun Tian was also a little shocked in his heart, he had misjudged before, at this time, I am afraid that the creatures moving in this disk-shaped space are by no means as short as he imagined, on the contrary, these creatures should be extremely huge, just because in that huge disk-shaped sunken space, the comparison made him have an illusion.

Because according to the comparison, there are about tens of thousands of such creatures living in each disc-shaped subsidence space, giving Yuntian the feeling that the life in each disc-shaped subsidence space is independent, and each is self-contained, just like an independent tribe or ethnic group living next to each other.

Yun Tian was very surprised by this way of surviving, he couldn't imagine why these creatures were so densely populated, they didn't need more space to survive, didn't they need more resources to develop? Moreover, so many creatures were highly concentrated, and as far as the eye could see, even the area that Yun Tian could observe, there were at least more than a thousand of this disc-shaped subsidence space, which was at least able to accommodate tens of millions of people, where was the food source for these people? It was impossible for them not to eat, right?

Because Yun Tian had already probed with his spiritual sense, these creatures were not ethereal things like resentful spirits, but living creatures, maybe not humans, but they were also very similar, then they must need food.

But with such a high-density space, how should food be produced? How do they obtain resources? Yun Tian became curious, and couldn't help but circle around these disc-shaped subsidence spaces, wanting to understand the disc-shaped subsidence space first.

After carefully probing around, Yun Tian found that this disc-shaped subsidence space was actually not completely closed, and around each disc-shaped subsidence space, there were several huge doors, these gates were about ten meters high, because the color was exactly the same as the surrounding walls, and the gaps between them were very small, so they couldn't be seen at all from a distance. At this time, the doors were closed, and it was impossible to see what was going on inside.

Yuntian has always wondered why these creatures live in a disc-shaped sunken space, instead of opening these spaces to form an open space where everyone communicates and lives with each other.

After walking around for a long time, Yun Tian, who was about to leave, suddenly made a discovery, that is, the sky seemed to be darkening at this time, and he could immediately confirm that the space was indeed darkening, because since he entered this mysterious world, the brightness now has changed a lot compared to when it just came down, and the space at this time has become quieter and darker.

I'm afraid there is also a difference between day and night here! Yun Tian immediately made such a judgment, since there is a difference between day and night, then you might as well wait patiently for a while to see if there will be any chance after dark.

So Yun Tian found a corner that was not easy to be found, sat down cross-legged, and began to meditate, he planned to wait for night to fall, and then look for an opportunity to enter this disc-shaped sunken space.

In this way, almost two hours passed, the sky was already as dark as ink, and the clouds saw that the time was almost up, and then he got up, ready to climb over the outer edge of a hundred meters high and enter the disc-shaped sunken space.

But at this time, he suddenly heard a whimpering sound in the distance, and when he heard this sound, he couldn't help but be stunned for a moment.

What the hell is going on?" Yun Tian raised his head vigilantly, and released a spiritual sense in the direction where the voice came from.

But then his complexion changed dramatically, and his face was full of shock.

Just in the direction where his spiritual sense was released, Yun Tian sensed that countless resentful spirits appeared densely in front of him, and he released his spiritual sense with all his strength in all directions, and the places he sensed were full of traces of resentful spirits, and the number of resentful spirits was almost endless!

"Oh my God, if this is surrounded by resentful spirits, where is there a way to live!" Yun Tian's face turned blue, no wonder those underground creatures he saw before would live in this strange disc-shaped space, and the lovers lived here to defend against the attacks of resentful spirits!

Sensing countless resentful spirits, Yun Tian's head was big, and he hurriedly ran out, trying his best to rush in the direction he came.

When I came down before, it should have been the day of this underground dark world, so I didn't sense the existence of the resentful spirits, but where did I think that the resentful spirits here are so terrifying at night, and the underground world at this time is the world that really belongs to the dark system, and it has completely become a paradise for the resentful spirits.

Now it seems that this Xuanyin Realm is also divided into day and night, and day and night are the activity time of underground creatures and resentful spirits respectively, but in this way, Yuntian is also facing trouble, if he wants to uncover the secrets here, he must continue to go deeper, but at the moment, it seems that he can only travel during the day, and he must find a place to hide at night.

The speed of the resentful spirits was extremely fast, and they were gathered from all directions, and Yun Tian ran desperately before he could be regarded as rushing back to the place where he had come down before, above the wellhead where the Xuanyu Seal was imprisoned. At this time, the surrounding resentful spirits were getting closer and closer, and they were about to envelop the clouds.

Yun Tian finally breathed a sigh of relief, stretched his wings vigorously, and flew towards the opening above, it seemed that a qiē plan was about to be suspended, and until a good solution was found, this underground depth could not be rushed into.

Seeing that Yun Tian was about to approach the wellhead, suddenly his figure froze, and an expression of disbelief appeared on his face