Lin Xuanfeng's soul floated all the way down, and this passage was directly hundreds of meters deep, and after reaching the bottom, it began to slowly go down diagonally. The temperature below has become noticeably much higher, and after another kilometer or two, the surrounding rocks have begun to turn dark red.

This is a phenomenon that can only occur after the temperature has reached a certain level.

Lin Xuanfeng was overjoyed, it seems that he chose the right passage by himself, and it can really lead to the location of the underground magma.

All the way down, a few more kilometers. The surroundings were already fiery red, and the rocks were burning, and they were starting to soften a little.

Out of the passageway, he came to a large hall. It's like a lava lake. The hot lava bubbled in the pool, dancing like cheerful elves.

There is a large rock in the center where a few people can sit, and there are quite a few towering rocks in the pool. Some of them have fire, some of them don't, which is very strange.

That's it! Overjoyed, he thought about it, and directly used his divine foot to return to the ground, and then burrowed back into his body.

When he opened his eyes, Lin Xuanfeng didn't delay, and immediately found the location of the cave just now.

If you want to get in, you have to get the outermost rock more than a meter thick first. His right hand was condensed, and there was a faint light flickering on his fist, and then he punched it over.

"Click!" There was a loud crisp sound, and the one-meter-thick rock was directly shattered, revealing a huge hole.

He quickly jumped in and immediately rushed inside. The soul has been here, there is no danger here, and he is familiar with the terrain, so it can be said that he is familiar with the road.

When you get to the place where you fall vertically, you think that a lot of magma will be washed out of here when the volcano erupts, so there are traces of erosion on the walls of the passage, which are not smooth, and they are just borrowing strength.

With these places to borrow strength, he used his strength to stop every ten meters he fell, and then descended again. In this way, you will not fall more than 100 meters directly and get injured.

Even if he is now in the realm of true martial arts, if he falls down hundreds of meters, he will be injured.

After more than a dozen pauses, I finally got my feet on the ground and came to the bottom. The temperature here was already dozens of degrees higher, and he immediately squeezed the trick with both hands. Hurriedly wrapped several defensive enchantments around himself, and then began to go down quickly with confidence.

Buy time, this kind of place is really dangerous. It seems to be a calm underground, but there is a possibility of eruption of magma at any time. If you do get stuck in lava, it's not fun.

Although it only erupts once every three and a half years, who can say for sure what is natural. What if, all of a sudden, it goes crazy?

All the way down, soon came to the end of the passage. The inside is fiery red, and the temperature is less than 1,000 degrees Celsius. Because, this is the melting point of the rock.

This is still only the temperature of the upper layer of magma, and if you go deeper into the ground, the temperature will be even more terrifying.

Lin Xuanfeng jumped up and jumped onto a raised column-shaped stone seven or eight meters away. The bottom of the pillar is very thick, but the top is very pointed, and it can only accommodate one foot to stand on.

A little careless. Very easy to fall.

After several jumps, I finally came to the central platform through these raised columnar rocks. The platform is not big, just enough for a person to sit cross-legged.

It's not so much about the platform. It would be more accurate to say that it is a larger columnar rock.

Without thinking too much, he quickly sat down, held his breath and concentrated, mobilizing the mana of his whole body. Hands are constantly flipping and flying. Start pinching. This is the fire making trick taught by the old man, which is specially used to extract fire.

For the time being, there is no better fire, so we can only use this kind of earth fire first.

Earth fire, which can refine the elixir of human pill rolls and spirit pill rolls. Of course, if you want to refine a high-grade elixir, you have to have a higher-grade flame. Now he is only refining ordinary elixirs, and this earth fire is enough.

With the light flew out one after another. Then shoot into the lava below. The magma, which was originally calm, began to churn. The movement grew bigger and bigger, and finally the magma in the entire pool seemed to be boiling water. Boiling.

Huge bubbles continue to erupt, and from time to time magma flies up, the scene is very terrifying.

Obviously, the temperature of these magma on the surface is still too low. Therefore, he used the fire technique to extract high temperature from the magma at the bottom. It's not easy, and it's not short.

One of the basic criteria for becoming a Danshi is: Success has its own Danhuo. That is, to extract a powerful fire from the outside world, and let this fire integrate into one's body.

If the body is not strong enough to withstand it. It is very likely that it will be burned to ashes by the fire in an instant.

Therefore, this step is a threshold, and it is also an extremely dangerous step.

It can be said that there may not be one person who succeeds in possessing his own Dan Fire among a hundred Dan disciples. The difficulty of this can be imagined. However, Lin Xuanfeng is very confident in himself.

My body can be regarded as having been refined many times, and the tenacity should be very strong.

With one fire after another, he shot into the depths of the magma. Wisps of extremely hot flames flew out of the pool and into the air.

This process, Lin Xuanfeng spent a full day to carry out. In the air in front of him, a fireball the size of a tabletop had been condensed. The temperature of the fireball is extremely high. Not even the magma below.

Don't think that's half the battle, no, it's just the first step.

Although the temperature of this fireball is extremely high, it is far from enough to meet the requirements of Danhuo.

In fact. According to the requirements of ordinary Danhuo, it has long been more than enough. However, the requirements of the old man are extremely high, so the standard is naturally not comparable to that of ordinary Dan masters.

Lin Xuanfeng was so tired that he was sweating profusely, and after resting for a while. He began to continue to pinch the fire refining technique again.

Refining the fire technique, but refining the fireball that he just took again, refining the impurities inside in order to keep improving.

Streams of light shot into the fireballs, and then wisps of impurity flames were forced out and fell into the magma below.

He persisted in this process for three days. It took three times as long as the previous fireball, and the fireball was the size of a basketball.

The fireball obtained after excellence is frighteningly hot, and it is very bright, and it has already shown a bright yellow color.

Lin Xuanfeng was tired enough, and immediately replenished his energy from the black puppet. He still imagined this fire taking it too easy. It turns out that it consumes mana so much.

If he still can't persevere, he may have to give up first.

After having to replenish, I finally breathed a sigh of relief. Then you start casting the fire fixing technique.

This is the third procedure for taking fire, and it has to shrink the fireball again, and in the end, only a small wisp like a finger has completely stabilized its shape and size, and it is qualified.

This process is several times more difficult than the first two combined.

Without a lot of power, you can't compress it.

This process, which took ten days to do, almost drained him, finally compressed the flames into a small cluster of flames the size of a finger. The flame floated in the air like a candle, turning from yellow to blue, indicating that its temperature had reached a terrifying level. Its power, Lin Xuanfeng himself did not dare to underestimate it. If this is thrown, it is definitely not weaker than a bomb.

It's just that he is so tired that he is about to fall apart now, his whole body is wet with sweat, and he is instantly dried by the heat here.

If it weren't for the layer-defending enchantment on his body, I'm afraid even his whole body would have been roasted dry.

"What should I do, do you want to continue?" Lin Xuanfeng solemnized, the first three steps have been completed, and the last step is missing, which is also a test of life and death. Let this fire enter the body, but can your body really withstand it?

If it was in his heyday, he might still have some confidence. But now that he has been depleted of his mana, he is powerless to fight at all.

However, do you want to give up? Finally, he is not reconciled to do this.

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