This giant dome was several feet high, and as soon as you got closer, you could feel the devastating heat coming from inside. Looking at Dingzhong, there was a half-transparent box inside, and I don't know what material it was made of. There was a cluster of green lotus-like flames in the box, which was beating non-stop.

"This is ......"

After Lu Xu released the blue lotus-like flame in the Divine Sense Sensing Box, an expression of ecstasy appeared on his face.

The flames emitted by those green lotus-like flames were somewhat similar to the flames used by the green-haired iron corpse before, and it seemed that this green-haired iron corpse really used this spiritual fire to extract energy, so that it had the magical power to use cyan flames.

The flame attack of the green-haired iron corpse was extremely powerful, and it was able to cut off his own spiral knife alive, judging by its form, it should have a lot to do with this spiritual fire. However, what made Lu Xu a little strange was that the green-haired iron corpse had been getting this spiritual fire for so long, why didn't he refine it. Moreover, another Jindan stage cultivator of Haotian Sect did not refine this spiritual fire, could it be ......

Lu Xu thought of what the tall man in black said in the fork in the road, it could be that it was this green-haired iron corpse that chased and killed his uncle back then, and another Jindan stage monk of Haotian Sect didn't know about the spiritual fire, otherwise it would be impossible not to refine this spiritual fire.

When Lu Xu thought about it like this, he couldn't help but be ecstatic in his heart.

Such an extremely rare spiritual fire that has not been refined, wouldn't it be cheaper for him.

You must know that the appearance of any kind of spiritual fire will cause a bloody storm in the immortal cultivation world.

All things in heaven and earth have their own spirits, and so does spiritual fire.

The spiritual fire was born between heaven and earth, formed for thousands of years, gathered for thousands of years, incinerated all things, and never extinguished. Every kind of spiritual fire has incredible magical powers. Especially for an alchemist, once the spiritual fire is refined, it means that the success rate of alchemy can be increased, and it has a bonus effect on the improvement of alchemy.

Thinking of this, Lu Xu immediately stopped hesitating to pinch the trick with one hand and began to cast a spell.

After a meal, Lu Xu finally took out the spiritual fire from the danding with a slightly pale face, and then closed the translucent box containing the spiritual fire and put it into the storage bag.

Legend has it that the spiritual fire has the power to incinerate all things, and any loaded artifact will be burned as soon as it comes close to it. Only an ethereal stone unique to the southernmost part of the Antarctic Domain can not be afraid of the burning of spiritual fire.

Presumably, this translucent box is made of ethereal stones, otherwise it would never have been loaded with spiritual fire.

Then he searched around the hall again.

As a result, apart from this Danding in the middle, there is nothing else worth noting at all.

So Lu Xu, after putting this Danding into the storage bag, returned to the center of the original magic circle, raised his head and glanced at the entrance.

Its eyes narrowed, and the translucent moon blade suddenly slashed into the air.

"Poof".

A curtain of light emerged, and the moon blade slashed at it flicked open.

The ban is really not simple.

However, this time, without the disturbance of others, Lu Xu's arm blurred, and suddenly the moon blade conjured up more than a dozen waning moons in the air and slashed wildly, and one after another waning moons rolled out.

After a short while, there was a roar, and the light curtain finally shattered inch by inch.

Lu Xu smiled slightly, and as soon as his body moved, he turned into a phantom and rose into the sky.

"Bang".

Lu Xu stepped on the exit of the upper hall with his feet again. There was a look of joy on his face.

The body of the tall man in black was still there.

Lu Xu stepped forward without thinking, and after a little search, he also found tens of thousands of low-level spirit stones and some elixir talismans from his storage bag, as well as the big axe that could release demonic energy attacks.

This magic weapon is obviously also a magic weapon, although it doesn't seem to be very powerful, but it should also be a superb magic weapon. However, Lu Xu didn't need it, but if he took it out, he should be able to sell thousands of spirit stones.

However, it was a pity that he didn't find any useful cultivation texts this time. However, there is a jade slip that records the refining of evil children, which was smashed by Lu Xu's palm, this kind of secret technique of destroying human nature, even if it is powerful, he will not cultivate.

In the following time, Lu Xu went to check the remaining black coffins again, and found a refined corpse in almost every coffin.

Although Lu Xu was somewhat interested in alchemy, all the zombies here were ordinary zombies, so he had no interest.

But what he got now alone was overjoying.

On his trip to the underground passage, he not only obtained an incomparably rare spiritual fire and a magic weapon, but also obtained nearly 300,000 low-level spirit stones at once.

He immediately put away the storage bag of the tall man in black and destroyed all the traces left here before leaving satisfied.

After a night of busyness and excitement, the sky has begun to shine.

Lu Xu was afraid that someone would come here again, and after coming out of the tunnel, he flew into the distance, looking for the whereabouts of the crystal by the way.

Three days later.

Lu Xu, who didn't find the whereabouts of the crystal along the way, came to a Xiuxianfang City, rented a house, sat in the practice room, took out the small purple tower magic weapon in the storage bag and studied it carefully.

He had already tested it, and this magic weapon was extremely strong, and its whole body was extremely hard, even the Moon Blade and the cyan flying sword could not leave a shallow sword mark on it.

If you look closely, you can see that the small purple tower is engraved with five small golden characters - purple gold exquisite tower.

As soon as he raised his hand, Lu Xu blessed this Purple Gold Linglong Pagoda with a levitation technique, and then began to play a series of spells on its body, watching the Purple Gold Exquisite Pagoda smile one by one.

The time of a stick of incense passed, and he saw that the mana in his body was about to be exhausted, but the Purple Gold Linglong Pagoda still did not have the slightest reaction, which made Lu Xu cry bitterly.

He knew that if the mana needed for this magic weapon was not satisfied, it would not react in any way.

Just when Lu Xu was in a dilemma, the Purple Gold Exquisite Tower finally reacted, and the purple light on the tower was bursting with purple light. Immediately, I heard a "poof", and the shadowless needle shot out of it. And the purple gold exquisite pagoda also dimmed with purple light and returned to its original appearance.

"Hey, it seems that the magic weapon is not available to the monks in the foundation building period. Lu Xu put the Purple Gold Linglong Pagoda into the storage bag, and only then began to check the few jade slips in the storage bag of the green-haired iron corpse, hoping to find some Danfang.

When the book is used, the Danfang is hated, and so is the Danfang, after running around outside, Lu Xu really knows how precious the Danfang is.

The surviving Danfang is generally divided into two kinds: one is the Danfang handed down from ancient times, and the other is the Danfang that has been studied by the descendants of the family or sect after several generations of efforts.

The alchemy pills left over from the ancient period have long been lost, and now the alchemists of the major sects have either studied them painstakingly for dozens of generations in the family, or they are occasionally found from the ancient ruins. Moreover, the slightly better Dan Fang was all pinched in the hands of the monks of the Jindan Period, and even if the monks of the Foundation Building Period had one or two Dan Fangs, they could only refine insignificant pills, such as the Dingyan Pill that Lu Xu found in the Zongmen Zangjing Pavilion.

There is also a certain gap between these two kinds of Dan prescriptions in terms of effect. If the elixir refined according to the ancient pill recipe, generally speaking, all of them are genuine and top-grade elixirs. But the point is that the raw materials of these Danfang are now too difficult to find, and it is almost impossible to get together. Of course, these raw materials are just hard to find, and they definitely still exist in this world, but the requirements for vintage are extremely high. The other kind of Danfang is just something that has been re-tested on the original ancient recipe by constantly looking for alternative raw materials. In this way, although the raw materials for alchemy are re-available, the efficacy has also decreased a lot, which is also a helpless thing in the immortal cultivation world.

"Huh?" Finally, when Lu Xu checked the third one, he finally found the jade slip that recorded the Danfang, which recorded more than ten kinds of ancient recipes handed down from ancient times.

"Hey. After a while, Lu Xu sighed heavily, there are seven or eight kinds of Danfang in the foundation building period recorded in this jade slip, but there are only two that are really useful to it, but this is not bad.

Most of the elixirs required for the ancient recipes recorded in this jade slip have been extinct in this world, only these two are relatively common, but they have extremely high requirements for the age of the elixir.

However, this is not a problem for Lu Xu, these elixirs are all in his exquisite secret realm, and they are all thousands of years old.

After Lu Xu carefully sorted out the elixir in the exquisite secret realm, he got up and walked out of the practice room and left his house.

Half an hour later, he came to the alchemy room rented out by Fang City.

"Hey, this senior, do you want to rent an alchemy room?" The guy who greeted him saw that Lu Xu was a monk in the foundation building period, and immediately said with a smile on his face.

"Exactly, is there a spare alchemy room here?" Lu Xu said with a slight smile, and then with a shake of his sleeve, a low-level spirit stone was thrown directly to the guy.

"Yes, yes, senior, we have the best earth stove here. The guy took the spirit stone and immediately said with a smile.

"Okay, you can take the way. Hearing this, Lu Xu nodded quietly.

So Lu Xu, under the leadership of his buddy, went straight to the depths of the alchemy room.

After a few moments, he was let into a fiery red stone house, which contained nothing but a lone cyan furnace.

After Lu Xu glanced at the earth fire furnace at a crack below the Dan furnace, he showed a satisfied look on his face. Although the earth fire furnace here is not as good as the fire initiating beast of the sect, it is still enough.

He immediately closed the stone door with a flick of his sleeve and opened the prohibition of the alchemy room.

Immediately, a faint white light curtain emerged, enveloping the entire secret room.

After doing all this, Lu Xu slapped the storage bag with one hand.

I saw a roll of light, and more than a dozen jade bottles appeared on the ground.

Lu Xu raised his hand and slapped the Dan furnace, and after the lid flashed, it floated silently.

After heating the Dan furnace, he immediately picked up a jade bottle and poured the elixir inside into the Dan furnace.

Immediately, Lu Xu's sleeves flicked again, and the lid fell down again.

With one hand, he pinched the trick, and several magic decisions popped out from the furnace below the Chong Dan furnace.

"Poof"!

The temperature in the furnace instantly increased, and thick red flames erupted, enveloping the Dan furnace in an instant.

......

Half a year later, Lu Xu looked at the more than ten bottles of Qingyang Pill and Zengling Pill in front of him and left the alchemist with a smile on his face, and went straight to the rented mansion.