After Zuo Feng was preparing to set off, he felt that this refining tool was definitely much simpler and easier than refining medicine.

But what happened later also completely shattered the idea that had just emerged. His original feeling was definitely an illusion. He also truly understood why good utensils were so expensive.

"Bang"

A dull explosion sounded outside Zuo Feng's courtyard, and the sudden sound was no longer as eye-catching as before. Zuo Feng looked up at the flames and smoke rising in front of him, as well as a new large pit added in the courtyard, and couldn't help but shake his head secretly.

His eyes fell back onto the small tripod in front of him intentionally or unintentionally. This tripod was no longer the one he bought back. The one he bought before was scrapped due to the explosion when he first fused the flame crystal with the metal hemisphere. If Zuo Feng hadn't reacted quickly and had rolled and crawled before the explosion, he probably wouldn't have to worry about the spiral tower trial anymore.

He destroyed two of the artifacts and cauldrons in total, and he made some progress in fusion. Because after that, the artifacts and cauldrons were never destroyed again, but there were seven or eight holes of large size in the yard. Although he could throw out the semi-finished flame crystal fire thunder in time before the smelting became unstable, he still failed to complete a flame crystal fire thunder so far.

With a deep brow staring at the cauldron in front of him, problems in Zuo Feng's production emerged one by one. The fusion of the metal hemisphere and the flame crystal will become extremely unstable due to high temperature. At this time, spiritual energy becomes crucial to the fine control of the flame, even a small deviation will cause the entire fire thunder to enter the startup state in advance.

If this problem cannot be solved, then his plan to make the Fire Crystal Fire Thunder will be completely ruined. However, the control of flame requires continuous accumulation of experience, but what Zuo Feng lacks the most now is time, and only more than a month is the day of trial.

Zuo Feng, who was anxious in his heart, subconsciously stood up, and then walked out of the house. Looking at the small pits all over the ground, he still remembered the shocked expression when Zuo Hou and others ran to see him anxiously after the explosion. Suddenly, a cool breeze blew past the yard, feeling the faint coolness Zuo Feng also remembered that it was already autumn.

Their group has been in Yancheng for more than three months. When recalling the many things that happened during this period, Zuo Feng had to sigh that the world is changing. If he had not been helped by his friends, if he had not encountered that "illusion", if he had not...

"Um?"

When Zuo Feng recalled the illusion, he couldn't help frowning, as if something had been forgotten by him. After a moment of thinking, Zuo Feng's face showed joy, and then his mind power extended into his palm, and a crystal-clear little jade bottle appeared in Zuo Feng's palm instantly.

Feeling the slight coolness in his palm, the "cold ice fog" that Huansheng once gave him was used only once when he killed the Great Elder, and there should be a lot of cold air left in it. Since the temperature was too high when refining the fire thunder, this little thing should be used to solve this problem, and at least it can also play a role in alleviating it.

With a look of joy, Zuo Feng returned to the house again. This time, after closing the door, it was already five days later when it opened again. When Zuo Feng walked out of the house again, although his face was exhausted, there was unconcealed joy in his eyes.

After a simple washing and changing into clean clothes, Zuo Feng made some changes to himself and left Yancheng.

Outside Yancheng was a vast plain, and Zuo Feng passed through the plain and entered the forest without stopping. He paid great attention to the movements around him, and stopped in a clearing in a forest after confirming that he had not been followed.

After Zuo Feng stood still, he carefully took out a silver-white metal ball from his arms. The size of the ball was smaller and the baby's fist, with tiny holes and faint cracks on the surface. Zuo Feng looked at the cracks and sighed helplessly.

He thought of temporarily alleviating the instability of refining fire thunder, so he naturally used the "cold ice fog" to cool the fire thunder rapidly, so that it could force it to enter a stable state when the flame was not controlled. This method was really as Zuo Feng guessed, and could avoid the instability in smelting.

But after actually operating, Zuo Feng discovered another disadvantage. It was that when the high temperature was fused, he suddenly used the extremely cold air to water it, which would cause the metal on the surface of the fire and thunder to produce a trace of irregular cracks.

He sighed helplessly. With Zuo Feng's current refining level, it is not easy to make this "Yan Crystal Fire Thunder". Although there are some small silk on the surface, it is barely successful in making it. Because he doesn't want to continue to destroy the ground in the courtyard, Zuo Feng wanted to come here to try whether this thing is really useful.

With a thought, a trace of spiritual energy was transmitted to the fire thunder in his hand through his palm. Almost in the blink of an eye, the temperature of the fire thunder in his hand began to rise sharply. As for the extremely unstable characteristics of the fire thunder in his hand, Zuo Feng, who had many failed experiences, dared not hesitate and hurriedly threw it into the distance.

Zuo Feng had long watched a small tree as thick as a forearm. The fire thunder rolled a few times and hit the bottom of the tree. Then a trace of hot air emerged from the crack on the silver-white surface of the fire thunder, and some slight deformation began to appear outside the sphere. This change was carried out in an instant, and then a fire light flashed.

"boom"

The dull explosion spread, and the flames flew around with silver-white fragments. Zuo Feng narrowed his eyes slightly to judge the range and power of the explosion. When the flames slightly converged, Zuo Feng walked towards the small tree.

"It doesn't seem to be too powerful."

Zuo Feng murmured to himself, comparing with the fire thunder that had exploded in the courtyard. The bottom of the tree, which was as thick as a forearm in front of him, was burnt but it was not broken. The explosion only exploded a gap on the bottom of the tree. Obviously, the gaps on the surface weakened the power of the explosion.

But when Zuo Feng observed carefully again, he had some surprise discoveries. There were tiny cuts on the surface of the small tree, and some silver-white fragments were deeply inserted into the trunk. Zuo Feng turned his head and looked around and found that there were traces of fragments cutting on the trees within two meters.

Zuo Feng's face, which was a little unhappy, finally slowly appeared a smile. Then he took out a fire thunder from his arms and looked at another small tree in the distance.

...

Before the city gate was closed, a thin figure wrapped in a black robe and mixed into the hurried crowd entered Yancheng. The boy in black robe covered his head with a wide hat, and there was a slight joy in his eyes under the hat. After twists and turns, the boy disappeared outside the gate of a house.

This young man was Zuo Feng who hurriedly returned from outside the city. The power of the fire thunder was much worse than that Ning Xiao had introduced, but the destructive power barely met his requirements.

Zuo Feng became busier in the next few days. He allocated the day, two hours of refining medicines and two hours of refining weapons, and all other time was used to adapt to the damn "prison lock" of the left hand except for rest. After all, Zuo Feng is now unable to even exert half of his usual combat power because of the "prison lock".

Time passed little by little, and during this period, Zuo Feng also took the time to go to the "Zuoyun Trading Bank" on the other side of the house. He was not very concerned about the business of the trading bank, but just handed dozens of packets of the newly refined "Body Bamboo Salmon" to Zuo Hou. After hearing the name and efficacy of the medicine powder, a group of teenagers were naturally extremely happy.

After all, people who lived in the mountains had never tried to use medicine powder to strengthen their body refining levels. Zuo Feng just turned around and then returned to his courtyard and entered a semi-retard state.

In the blink of an eye, the March deadline was approaching. Early this morning, Zuo Feng was about to go out and continue to be proficient in the "prison lock" in his hand when he heard a dull knock on the door.

Zuo Feng, who looked puzzled, approached the courtyard gate with a vigilant look. During this period, he had been wary of what methods the Commander Zhang Yu's Mansion used to him. But since he came back, the Commander Zhang Yu's Mansion became extremely quiet, and even the people sent to monitor him had been withdrawn.

When he walked to the door, Zuo Feng peeked outward and took a look. Although he only saw a little bit, Zuo Feng immediately relaxed, opened the door with a smile, and said at the same time.

"Why did Uncle Tian have free time today to visit the boy?"

Uncle Tian said with a wry smile: "I have no time left. I don't know what you are busy all day long. I have been here a few times before but I haven't seen you. The reason why I came to you is naturally for the trial of the spiral tower."

When Zuo Feng heard the old man say this, he was slightly stunned and said with confusion: "Don't the spiral tower trial start in three days?"

Uncle Tian looked at Zuo Feng angrily, and then said with some laughter and crying: "My Master Zuo Feng, do you think that the spiral tower trial will not be successful in this Yancheng? It takes at least two days to get there from Yancheng, so we have to set off today no matter what."

When Zuo Feng heard this, he scratched his head embarrassedly. He didn't ask in detail about the trial of the spiral tower, so he never thought about setting out in advance. He was a little embarrassed like Uncle Tian grinning and said with a smile.

"Then you wait for me here for a while, I'll go and prepare for a little bit, and you'll go with you right away."

As he said that, Zuo Feng turned around and went to his small room for refining medicine. Uncle Tian stood at the door casually and looked at the yard casually.

When Zuo Feng walked out of the room, he saw Uncle Tian's expression of astonishment. Following his gaze, Zuo Feng looked into the yard and said embarrassedly: "I tried to refine a batch of medicine powder during this period, but I didn't master the heat well, so I made it look like this now."

Uncle Tian’s eyes flashed a few times, and then he looked at Zuo Feng with great meaning. The boy brought him more and more mystery, and at the same time, he also felt that it was definitely a wise choice to invite him to participate in this trial.

(End of this chapter)
Chapter completed!