Yunfei has read the introduction of the rock-skinned wild boar in the manual, and the strength of the rock-skinned wild boar is equivalent to that of a third-order trainee warrior of the forging body, but the real terrifying thing about them is that they are social animals, even if they are a high-end existence of the food chain like the purple cloud leopard, they do not dare to easily annoy a group of rock-skinned wild boars, and the most troublesome thing is that once the rock-skinned wild boar is annoyed and targets a target, unless the target is killed, they will not give up easily.

Yun Fei was in such a situation now, he absolutely believed that the group of rock-skinned wild boars behind him would be exhausted with him until his physical strength was exhausted, unless he could quickly get out of the tracking range of this group of rock-skinned wild boars at an ultra-high straight-line speed. Just as Yun Fei began to feel about the despair of his fate, he suddenly saw a small hole in the mountain in front of him, and Yun Fei's eyes immediately lit up, thinking that if he could get into it, he might be able to escape.

Yun Fei suddenly burst out with all his potential, rushed to the cave as fast as he could, and flew into the cave with both hands and feet. Not long after Yun Fei's whole body got in, there was the sound of a rock-skinned boar angrily hitting the entrance of the cave, fortunately, this cave was indeed a little narrow, just a little wider than Yunfei's body, and it was definitely impossible to enter with the body of a rock-skinned boar. But when Yun Fei came back to his senses, he found himself in an awkward situation, because he couldn't turn around in this cave at all, and the entrance of the cave behind him was surrounded by a group of angry rock boars, and he seemed to have no other choice but to stay here in a lying position or continue to move forward.

Lying on the spot and waiting for death is not Yun Fei's style, and the angry rock skin boar behind him doesn't know when it will be able to retreat, so Yun Fei decides to continue to see if there is another way out. Crawling all the way towards the depths of the cave in a prostrate position, Yun Fei finally found that the cave inside seemed to gradually become wider, and after climbing a certain distance, he was able to continue in a kneeling position.

The cave is very tortuous and winding, Yun Fei has no sense of direction at all as he climbs and crawls, fortunately there is no fork in the road in this cave, otherwise he would have to get lost. After a while, Yun Fei finally climbed to the end of the cave, Yun Fei looked outside the cave, and to his disappointment, it was still dark outside, not an exit to the outside of the mountain, he seemed to have come to the deeper part of the mountain.

Yun Fei sat at the end of the cave, untied the backpack on his back, fumbled in it with his hands for a while, took out a flint he bought from the bazaar, and then ripped off one of the cuffs of his clothes and lit it. The ignited fire finally lit up a corner of the world outside the cave, outside the cave turned out to be a large underground karst cave, the entrance of the cave was still some distance from the ground of the cave, but with Yun Fei's physical fitness, it was not difficult to jump down, the most surprising thing for Yun Fei was that he vaguely saw the shadows of some plants on the side of the cave wall.

Since there are plants that can grow here, there must be an underground river near this cave, and from the professional perspective of Yunfei's previous life, there is a very high chance that there will be another exit here. Thinking of this, Yun Fei jumped out of the cave without hesitation and fell into the cave below, as soon as he landed, the cloth in his hand burned out and went out, and he fell into darkness.

After a few breaths, the cave was once again illuminated by firelight, and Yun Fei held a bundle of lit branches in his hand and observed the surroundings again. The branch in his hand was made by Yun Fei after he found the plants growing on the wall of the cave just now, it turned out that this plant was a gray-barked dwarf tree that grew in a dark and damp place underground, and it was also a unique plant in this world, relying on these plants distributed throughout the cave, Yun Fei didn't have to worry about lighting for the time being.

The space of the cave looks relatively large, the height can be about 3 meters, the width is more than 5 meters, the distance of the entire cave is covered by unknown darkness, and I don't know where it leads, but the air here seems to be relatively sufficient, which makes Yunfei believe that this cave should have a vent, but I don't know if the size can accommodate a person to leave.

Yun Fei cheered up, started to catch fire, and slowly moved towards the depths. Half an hour later, when Yunfei heard the sound of the river flowing in the distance, he hurriedly supported his tired body and walked in the direction of the sound excitedly. After a few consecutive turns, Yun Fei stood at the exit of the cave, it was a huge underground space, a wide underground river divided the entire ground into two pieces, Yun Fei hurriedly walked to the river and took a closer look, the river water was clear and transparent, and there were many unknown small fish swimming around in the water.

"Luckily, it looks like the water and dinner are all in place. Thinking of this, Yun Fei immediately squatted down by the river and scooped a sip of water with his hand and tasted it, it was very cool and sweet, so he took out two water bladders with himself and filled the water, and then began to try to take the sword and stab the fish in the water.