However, there are only three levels of earth fire, which correspond to the first-order Dan, second-order Dan and third-order Dan of the elixir, if you want to refine the fourth-order Dan, then you must first be able to use the fourth-order fire. Pen & Fun & Pavilion www.biquge.info

There are also many conditions for using fourth-order fire, such as some powerful spiritual fires, which can greatly increase the power of earth fire, and use alchemist's earth fire to reach the strength of the fourth order.

Liu Xuan can't do this.

This is not Liu Xuan's strength washing, but Liu Xuan's spiritual fire power is not enough, Tu Wencheng said when he gave the spiritual fire to Liu Xuan, this kind of spiritual fire power is relatively low, but it is only suitable for refining first-order pills or can barely refine second-order pills, and it is precisely because of Liu Xuan's Five Elements Gathering Spirit Recipe that he has barely increased the power of spiritual fire a little, which can help him stabilize and control the third-order pill, but if he wants to refine the fourth-order pill, Liu Xuan's spiritual fire power is far from enough.

This purple rock taisulfur is an important auxiliary material that can raise the level of earth fire to the fourth order.

This thing is like coal, which can greatly improve the temperature persistence of the earthfire.

This thing is not uncommon in the spiritual world, so it is not too precious spiritual material, but you must know that the so-called is not uncommon at this level, most of the ordinary fourth-order Dan masters are powerhouses of the Transformation Pulse Level, but even with their identity, it is not bad to be able to get a few stones of Purple Rock Sulfur, but how many are here, Liu Xuan looked at it, the mountains were full of purple, and if these Purple Rock Sulfur were mined, I am afraid that they would be as high as a hill.

Thinking of this, Liu Xuan climbed towards a high place, this underground labyrinth was very powerful for cultivation, not only could the strength of the Qi Condensation Rank not be fully exerted, but even the Edgeworth Flight could not do it, so if he wanted to see farther, he had to climb higher.

But he had just climbed for a short time, and before he could even climb half of it, he was interrupted by a sudden attack, and in the cliffs of this purple rock sulfur, there lived a creature similar to a spider, one by one the size of a basin, and the whole body appeared purple-red, and the back of the body had one purple spot after another, and from a distance, it looked like the same color as the cliff, and it was difficult to find their existence.

This thing is not only well concealed, but also has good defense and bounce power, once Liu almost caught the back of a purple spider monster, this guy bounced up directly, and spewed out a liquid with a pungent smell in his mouth, almost hurting Liu Xuan, the liquid sprayed on the ground, and immediately burst of green smoke, a rock was directly corroded, but how corrosive is this liquid, even if it is not a huge poison, it must be a strong acid substance, which is a bit similar to the characteristics of purple rock sulfur, it is very likely that this spider has eaten too much purple rock sulfur。

This guy is not only flexible, but also has an amazingly high defense, even if he is attacked by Liu Xuan's bare hands, he is not damaged at all, he can get up and continue to attack as soon as he rolls on the ground, and later forced Liu Xuan to pull out the Haotian Knife, and he successfully killed it, but it was only with the sharpness of the Haotian Knife, the death gas on the Haotian Knife, there was no suppression effect on this spider monster, which made Liu Xuan frown slightly.

Liu Xuan wasted all his strength, and then climbed the cliff, but looking at it, Liu Xuan was stunned, thinking that he was just trapped in a valley, but when he climbed to a high place, he realized that he knew that the trapped valley was not even a dime a dozen in this underground palace.

It's like an independent space here, and you can't see any color in the sky, it feels like a big black bowl, upside down, and the whole world is buckled in it, and the purple valley where Liu Xuan is located is only a very small part of this small world, at least, in Liu Xuan's opinion, it is like this, no wonder the four great families have only explored a small area for hundreds of years, and this underground palace is completely beyond human imagination.

It seems that this is an independent world, in some places, there are flames burning, and the firelight directly burns through half of the sky, from Liu Xuan's view, you can even see the firelight, and in some places, it is red and yellow, with Liu Xuan's eyesight, there is no way to reach it, but in Liu Xuan's opinion, it should be a desert.

In some places, there is a touch of green, which should be a forest, and in other places there is a blue light flashing, and I don't know if it is a sea or a large lake.

There are also some places, there is no light at all, it is completely dark, and I don't know what kind of place it is, Liu Xuan took out the map of the Tu family and compared it with the place where he was, and it turned out to be not right at all, it seems that these Ziyan Taisulfur areas should be areas that the Tu family has not set foot in.

The position he had just climbed up to was not the peak of this purple valley, but just a small cliff, not to mention the vast area with all kinds of glimmers, just the purple valley, he couldn't see it at a glance.

However, Liu Xuan observed for a long time, and finally found a little bit of abnormality in the mountains.

Don't look at the purple all the eyes, among these purple mountains, there is a mountain peak that stands out, although the height is about the same as other purple cliffs, but there are many traces of artificial carving, although it is far away, but faintly feel like a palace.

After discovering this, Liu Xuan did not hesitate, and after determining the direction, he walked in the direction of the palace, he originally planned to walk all the way from the top of the mountain, but not long after walking, he ran into trouble.

Because he was a hunter when he was a child, Liu Xuan's perception ability is quite good, which is also very rare in spiritual cultivation, he just left not long ago, and he felt that he had been targeted by something, and it felt like a monster hiding in the dark, as if he was about to pounce and attack himself at any time.

There is strangeness everywhere in this valley, so Liu Xuan took out the Huang Luo umbrella, if it is a duel with spiritual cultivation, with the Bagua Banning Technique, Liu Xuan has enough defensive capabilities, but it is different here, if there is really a particularly powerful existence, I am afraid that the Bagua Banning Technique may not be easy to use.

As soon as he took out the Huang Luo cabinet, Liu Xuan felt a sudden gust of wind behind him, the wind came quickly and urgently, even Liu Xuan, who had already prepared, almost couldn't cope with it, Liu Xuan hurriedly turned around, his body shrank slightly, and he completely hid behind the Huang Luo umbrella, and there was a strong force here, almost knocking the Huang Luo umbrella out of his hand, and a piercing friction sound came, and the Huang Luo umbrella in Liu Xuan's hand suddenly became much heavier.