This is an ancient mine cave, I don't know what year it was mined, leaving the old site here, looking at its traces, it is not like a machine digging, more is manually excavated.

Lin Yun went all the way forward, this mine cave is very large, the cave wall is all composed of ore, one by one there are scattered in the cave, there are several tons of one, it is covered with moss, it is extremely hard, much denser than the ordinary stones outside, and it is mostly iron ore.

Lin Yun was not in a hurry in this cave, and walked towards the depths, which was actually moving forward in this mountain.

This ancient mine cave was dug very deep, Lin Yun walked for half an hour, and he had not seen the bottom, but he was getting more and more spacious, and the stones became bigger and bigger, and there were big stones weighing more than ten tons, which were lying in the mine like this.

The ground began to get damp, and there was a constant dripping of water in the darkness, making a "tick-tock!" sound, but other than that, there was silence all around.

After walking for another twenty minutes, there was a faint light on the cave wall in front of him, which seemed to be accompanied by the sound of water, Lin Yun quickened his pace, and walked forward quickly from this passage, and after a while, an underground river appeared in front of him, and the river did not know where it flowed from.

There is no road in front of the river, but this passage begins to go upstream of the river, Lin Yun continues to walk upstream with the dark river, the whole river surface also begins to get wider and wider, and after walking for ten minutes, a huge mine hole appeared in front of him, the hole is scattered with huge pieces of ore, however, no one has been here for many years, the ground is very wet, in the center of the mine, there is a large lake, the dark river flows out from here, and there are continuous water flows out of it around the mountain wall of the lake, and it joins the lake.

Lin Yun's gaze swept from all corners of the cave, one by one, and suddenly, he fixed his eyes to see that under a boulder on the shore of the lake, a small grass with two leaves was already growing, the leaves were black and white, crystal clear, it was the eight-vein yin and yang grass that Lin Yun was looking for.

He was slightly happy in his heart, although there were only two pieces of this spirit grass, and there were not as many as eight pieces, but it was better than nothing, and it was still usable if it was improvised, thinking about it, he didn't stop his steps, and went straight towards the yin and yang.

Only at this moment, under the surface of the lake, suddenly the water waves wrinkled, and a black giant crocodile nearly ten meters long floated up from the lake. He didn't expect that the spirit grass that he had found so hard to find would be eaten by the giant crocodile without saying a word.

After swallowing this herb, the giant crocodile seemed to be very comfortable, crawled to the shore step by step, lay on the ground to rest, and didn't seem to find Lin Yun.

Lin Yun didn't bother it, or asked him to spit out the spirit grass, but looked around, feeling that this place was quite mysterious, suitable for an indescribable sense of yin and yang, he walked towards the lake, sensed it slightly, and then made up his mind, a fierce man plunged into the lake and swam towards the bottom of the lake.

This movement woke up the giant crocodile on the shore, and it quickly found Lin Yun, opened its mouth, dived from the shore, and chased towards Lin Yun, who had entered the lake, Lin Yun did not pay attention to it, but kept swimming towards the bottom of the lake.

Under this lake, the area is huge, and at a glance it is even larger than the karst cave above, and it is extremely deep.

He dived downward, for about ten minutes, and at the bottom of the lake, a huge black and white skull was imprinted in his eyes, the scene was very strange, emitting a faint fluorescent light, at a glance, the skull must be nearly a hundred meters.

"It's... This Yin Yang Devouring Spirit Beast!"

Lin Yun was a little surprised, there was the skeleton of a Yin Yang Devouring Spirit Beast lying down here, no wonder this place could grow such an eight-veined Yin Yang grass.

Lin Yun seemed to think of something, and quickly approached, and sure enough, there was a yin and yang grass with eight leaves growing next to the bones of this spirit beast, which didn't seem to have been eaten by this giant crocodile.

Lin Yun stretched out his hand to pick it, but, at this moment, a huge blood basin mouth suddenly tore towards him, his figure flashed, dodged this fatal bite, and looked at it, a larger black giant crocodile appeared in front of him like this, as soon as this giant crocodile appeared, the black crocodile that was nearly ten meters long just now was obviously as big as a small tadpole, looking at its size, this giant crocodile is conservatively estimated to be forty or fifty meters long, huge, obviously devouring a lot of spiritual grass, and evolved into such a shape.

I saw him open his mouth and spit out, and a huge black energy ball blasted towards Lin Yun, Lin Yun dodged and dodged, this black giant crocodile seemed to have a very high intelligence, but it was just around that spirit grass, and he didn't intend to chase after him and attack Lin Yun.

This made Lin Yun a little annoyed, he had not yet entered the innate realm, and he couldn't use it to fight under this water, and he was a little helpless for a while.

However, he turned his eyes and saw that the little crocodile behind him seemed to be its heir, so he already had a plan in his heart, only to see the starlight in his hand flash, an air sword appeared in his hand, and his whole body swayed on his body, and he ran straight towards the little crocodile that was chasing him.

I didn't think about it, I cut off the little crocodile with a sword, and directly cut off the two front paws of the little crocodile, and the blood gushed out instantly, dyeing the water in the lake red, the little crocodile was cut off by someone, and roared and rolled wildly in the lake in pain, Lin Yun didn't care about it, dragged it on its tail, and dragged it towards the shore of the lake.

And the giant crocodile below obviously saw this scene, and instantly became extremely violent, and could no longer care about the spirit grass it guarded, and as soon as its body stood up, it bit towards Lin Yun, and its whole body was like a submarine in the water.

Lin Yun dragged the little crocodile that was constantly struggling in the water towards the lake, and after a while, he got out of the lake and ran towards the shore, and the little crocodile was thrown aside by him.

The water bubbles on the lake bubbled up, and a huge black predator came out of the lake, stirring up a burst of agitated waves, the predator stared at Lin Yun with huge eyeballs, staring at Lin Yun deadly, at this moment, he was obviously angered by Lin Yun, he looked at the little crocodile next to him, and saw that he would not be able to die for a while, so he came to the shore and opened his mouth to bite Lin Yun.

The huge teeth are at least nearly a meter long, which is extremely terrifying, and the black bumps on the body are even higher and bulge, like a small mountain.

Lin Yun dodged and slashed at the predator's body with a sword, and a spark was sent out with a "ding", leaving only a scratch on it, which did not break his defense, which made Lin Yun's brows furrow, this crocodile defense was a little unusual, and even his air sword could not cause damage to it.

At this time, the predator was already a tail flick and roared towards him, the huge tail was like a long black snake, and it was pulled towards him, Lin Yun dodged and dodged, the predator turned around and pounced towards him, Lin Yun put away the qi sword in his hand, and held the starlight giant fist to the predator that was biting him, and it blasted out with a punch, directly on one of its giant teeth, breaking the giant tooth and falling into its giant mouth.

"Roar!"

Blood gushed out of the mouth of this predator, where has this predator eaten such a violent loss, the whole limb kicked, it had jumped a few meters high, and rushed towards Lin Yun, Lin Yun's figure flashed, and it was a slightly clumsy predator who dodged this action, and a punch hit his iron pimple-like back, but this punch was punched, and the stone sank into the sea, this predator did not have the slightest reaction, and his body rolled on the ground, crushing towards Lin Yun.

"Whew!"

Lin Yun retreated, seeing that he was about to hit the mountain wall, only to see him jump up in the air, kick out a few feet on the predator's body one after another, and fell to the opposite side, and the predator was also stared at by him and hit the mountain wall, and hit countless falling rocks rolling down, the predator was full of steel and iron bones, not afraid at all, these stones fell on him, without the slightest reaction, he pounced again, two front paws, like a hungry tiger pounced, trying to grab Lin Yun's body, but Lin Yun's body was too flexible, it couldn't even touch the corners of Lin Yun's clothes.

However, Lin Yun also frowned, this predator's cultivation has at least reached the middle stage of innate nature, and his defense is incomparable, and it is indeed a little difficult to deal with.

"Whew!"

The predator opened his mouth again and spit out a black electric snake, which was as fast as thunder, blasting a huge piece of ore behind Lin Yun to pieces.

He seemed to feel that the attack was effective, and when he opened his mouth, he spit out a black electric snake, which flashed towards Lin Yun and hit Lin Yun's afterimage.

Lin Yun was annoyed, raised his hand and blasted out a punch, and a huge vortex appeared on his fist, followed by a starlight dragon roaring out of it, towards the predator, biting away.

The Starlight Dragon bit the black electric snake in its mouth, and its speed did not decrease, and it slammed straight towards the predator, but in the next second, the situation that appeared made Lin Yun's face instantly gloomy.