As soon as the Divine Thoughts left the body, they were distorted and deformed by the scorching heat, and although Yang Kai was extremely fast as soon as he put them away, there were still a few Divine Thoughts that were incinerated away.

This made him snort, but fortunately, his divine sense was extremely powerful, and he had Wen Shenlian to nourish his soul, but he didn't pay attention to this loss.

At this moment, Yang Kai had already locked a certain position, his eyes crossed a distance of thousands of zhang, and he looked over there, only to see that somewhere on the ground, a terrifying red heat wave gushed out, and the heat wave was like a dragon going out to sea, hovering straight up, as if it was going to knock out a hole in the red curtain that was hidden in the sky, but this layer of prohibition in the flowing sand was not something that the heat wave could fight at all, the heat wave just rushed into the sky, blended into the red curtain, and disappeared like a mud cow into the sea.

An extremely pure fire aura swept away leisurely from the place where the heat wave appeared, and after sweeping over Yang Kai's position, it continued to spread around, and in an instant, the fifth layer of the Flowing Flame Sand Land flew sand and stones, a sign of the coming of the end.

Yang Xingxing's head moved, and he stood in place and waited for a long time, until the movement over there subsided, and then he took a difficult step and walked towards that side.

It was a full two hours before Yang Kai came to a place thousands of zhang away, staring intently at a huge pit in front of him, his face cloudy.

This is a huge crater, standing on the edge and looking down, I can only see the red lava flowing like water, which looks extremely stable at the moment, not as terrifying as the previous eruption, and streams of pure fire aura escapes from under this pit. Integrating into the environment of the fifth layer, it strengthens the power of the fifth layer little by little.

Occasionally, some gravel falls into the crater and turns into ash when it falls into the lava, and the terrifying temperature inside can be imagined.

It looks like a crater, but it's not a volcano because it's a crater on the ground, and there is no trace of a volcano erupting at all.

Moreover, Yang Kai was also keenly aware that the bottom of this pit was extending in all directions, and there seemed to be countless branch branches. Every now and then. You can also hear the movement of breathing from below, which is very regular.

Yang Kai's thoughts turned sharply, and a name blurted out: "Earth Lung Fire Pool?"

After finishing speaking, Yang Kai was stunned on the spot for a moment. I can't even seem to believe it.

The Earth Lung Fire Pool is an extremely rare underground fire vein. It is most loved by refiners. Because when the refiner is refining the weapon, he can completely use the power of this underground fire vein to refine the material, which can save the refiner a lot of energy. Save countless hours.

However, there are very few sects that can possess this kind of Earth Lung Fire Pool, and Yang Kai has not been exposed to many powerful forces, and he does not know much about the secrets in those sects, but he is sure that in the entire Dark Star, there are definitely no more than three sects that can have the Earth Lung Fire Pool as a place for special refining.

One of the criteria for judging the Earth Lung Fire Pool was this kind of law of exhaling and inhaling, as if the lungs were tightening, which was very obvious, so Yang Kai recognized it at once.

And judging from the purity of the fire aura escaping from the earth lung fire pool in front of him, this fire pool is the best of the best, any refiner here can give full play to his ability to the maximum, can refine the secret treasures that cannot be refined normally, and can maximize the performance of those secret treasures.

All kinds of thoughts flashed through his mind, and Yang Kai showed a look of surprise on his face.

This kind of earth lung fire pool, although he can't take it away, but it is the best place for him to refine Xuanyin Kui Water, he didn't expect that he could find this kind of place, originally he planned to find a nearby location to start refining Xuanyin Kui Water, but now he decided to go down and take a look.

Although it is dangerous, the more dangerous the place, the greater the benefits, and martial artists can never be afraid of any danger when they cultivate.

Thinking of this, Yang Kai's expression became resolute, and he didn't dare to slack off in the slightest, urging his own body protection demon flame to the greatest extent, and at the same time sacrificing his own purple shield, urging the power in the shield to form a small sandstorm that wrapped around him.

This was not over, Yang Kai did not hesitate to squander Saint Yuan's profligacy, condensing dozens of Heavenly Shields, flying around his side.

After doing this, he took a deep breath and jumped straight towards the entrance of the cave.

Being in mid-air, Yang Kai's expression was extremely focused, and under the sweeping of his eyes, he immediately saw a good foothold, his body twisted and shook in mid-air, and the person had already reached the sky above the foothold, and with a light step on his feet, he fell lightly to the other side, and once again stepped on another foothold that he had been optimistic about.

Sneer......

The lava beneath it was very unstable, and every now and then it erupted, and the sputtered lava shot out in all directions, smashing the walls around the crater.

The lava here is much more powerful than the lava in the ancient forbidden area that Wei Guchang and the others had fallen before.

A lot of lava smashed towards Yang Kai, and the Haotian Shield shattered at the touch, and in the blink of an eye, the dozens of Haotian Shields flying around Yang Kai were consumed.

The power of the wind and sand rolled up by the sandstorm guarding Yang Kai's side swept the lava aside, and those who occasionally broke through the wind and sand blockade were also blocked by Yang Kai's demonic flames, allowing him to avoid worries and concentrate on finding a suitable place to stay.

He went deeper as he replenished the damaged Vast Shield.

Around thirty breaths, Yang Kai's eyes lit up, and his body shot to the side, shooting directly into a wall hole.

As soon as he entered the cave, Yang Kai felt that the heat around him had slowed down a lot, as if he was being blocked by a layer of invisible force, which made Yang Kai suddenly curious.

Turning to look out, Yang Kai looked stunned, revealing an expression of disbelief.

Because he actually saw countless wall holes similar to the place he was in on the opposite side of the cave wall, and the wall holes were obviously not naturally generated, because the entrance of the wall cave was engraved with some numbers, sorted by A, B, C, D.

These holes were artificially carved out.

Yang Kai pondered for a moment, and immediately came to his senses, and quickly turned around to investigate in the wall cave he was in.

The wall hole was very deep, about thirty zhang, it was a straight passage at first, and after thirty zhang, Yang Kai immediately appeared in a spacious stone room.

The surrounding stone walls are dotted with strange stones for lighting, and although countless years have passed, they still emit a soft glow, making the place not dim.

With the help of these rays of light, Yang Kai put away his shield and demonic flame while beginning to look at this stone chamber.

The floor of the stone chamber was flat, and on the ground, a huge magic circle was inscribed, which seemed to be still functioning, and the hot force was transported in from the outside, and then converged towards the center.

And in the center of the position, there is a huge furnace ding, three-legged ears, coiled dragon carved phoenix, the style is simple, at a glance it is a thing of the age, it seems to be because of the long years of being baked by the heat force, the whole body is red, exuding an extremely hot high temperature.

Yang Kai investigated a little and found that this furnace was actually a low-grade refining furnace of the virtual grade.

Yang Yan used the refining furnace to quench materials before, but since the stone golem gave her a hand, she no longer needed to use the refining furnace, and only occasionally when she was refining high-level secret treasures and finally shaping them, she would use it.

Sure enough, seeing such a refining furnace, Yang Kai showed a look of understanding.

Seeing so many stone walls on the opposite side just now, Yang Xingxing had a guess, and now when he saw the situation in this stone room, he naturally verified his idea just now.

This earth lung fire pool is really the place where the refiners of that great sect use to refine weapons.

It's no wonder that there is such a treasure land, and the refiners of that sect naturally want to make good use of it, and the holes in the walls must be specially dug out for the refiners to use.

And this unknown ancient magic circle that existed in the stone chamber could draw the scorching power from the earth lung fire pool into the wall cave for the refiner to drive.

What a big stroke! Yang Kai was secretly speechless, being able to arrange these means under the Earth Lung Fire Pool was definitely not something that ordinary people could do, at least it was necessary for a Void King Realm powerhouse.

However, what made him feel sorry was that the low-grade refining furnace in front of him had melted a lot, and it was not in a complete form, and it seemed that after so many years of baking, it could not withstand it anymore.

The reason why the magic circle can continue to operate for tens of thousands of years must also be because of the continuous supply of energy from the earth's lung fire pool.

Thinking about this, Yang Kai turned his head to look around, and soon, he saw an abrupt stone pier in a corner. Although Yang Kai still didn't understand the formation, he had been with Yang Yan for a long time, and he knew some common sense.

This stone pier should be the control center of this stone chamber formation.

Stepping forward, he poured a Saint Yuan into the stone pier, and sure enough, with a roaring sound, the running magic circle automatically stopped, and the scorching power that had been continuously extracted was no longer poured into this side.

Yang Kai waited quietly for a long time, and only after the refining furnace had cooled down a little before he stepped forward to investigate.

At first glance, I was even more disappointed.

After the temperature cooled down, this refining furnace was shattered at the touch of a button, and it was originally unknown what material was being quenched in it, and at this moment it had already become a puddle of unknown things, which was useless.

It's no wonder that after such a long period of burning, even the most precious materials may have been scrapped, not to mention the materials that are only quenched in the virtual grade lower grade refining furnace, where can the grade be higher?

But it's just a stone room, and there are so many stone rooms out there.

In line with the truth that you can't return empty-handed when entering Treasure Mountain, Yang Kai began to investigate one stone chamber after another.

It took two days to investigate at least three hundred stone chambers, and Yang Kai didn't even get any gains that made him shine except for some refining tools that were stacked in the stone chambers and didn't start refining, and those refining furnaces were all damaged. (To be continued......)