Heihe River area is the absolute forbidden area of Fengdu city.

No dead soul can cross the Heihe River. It is as powerful as the three overlords and ghost envoys.

Fengdu city has a vast territory, larger than the stars, but Heihe River is broader and completely wraps the whole Fengdu city. It can be said that the main reason why the dead cannot leave Fengdu city is the Heihe River that completely wraps Fengdu city.

The former Qin Feng was also extradited to Fengdu city through the black river. The guide finally gave her a pair of shoes. This is his final card in Fengdu City, which is more important than eclipse moon fan and Tongyin order.

He always felt that this pair of shoes might eventually become his most critical thing and might help him the most.

However, this is not the time to move about the shoes. He just collects the shoes. So far, no one knows about the shoes, not even Su Rao or even the magic snake.

At present, Qinfeng is close to the Heihe River. Looking at the mighty Heihe River, he can't help feeling it.

"Heihe River has no head and no tail. It can't distinguish the upstream and downstream. It doesn't know whether to drive back or make the way. It surrounds the whole Fengdu city like a cage!"

"Sometimes, I doubt that Fengdu city is the real place of reincarnation. There will always be the annihilation of the dead and the dead will always enter it. There is no beginning or end and a permanent cycle!"

He said to himself, lamenting the terrible of the black river, but soon he shook his head and stopped thinking.

"Well, it's useless to think more. My purpose is to Heihe River. These ancient things can't be thought of by me now!"

He turned his attention back to the Heihe River.

There are many substances in the Heihe River water. The insulating potion is refined from the substances separated from the Heihe River.

However, there is another material that is more critical. This material contains a power that can crack the law of causality, which is very terrible.

Qin Feng ventured into the magic scorpion territory to find the poisonous corpse flower, which is why.

At the moment, everything was ready. Naturally, he stopped here and took the black river with the white jade bottle of lanolin. Then, with the help of the magic snake, he successfully separated the black river from all kinds of material particles contained in it.

One of the greatest strengths of the magic snake is separation.

After separating these substances, Qin Feng screened them to retain the granular substances in the hidden cause and effect part, and then gathered Qi to form a tripod. All these granular substances and poisonous corpse flowers were put into it for refining.

As a result, he failed.

In three days, he used many methods to refine, but he was always unable to refine the corresponding treasure medicine.

He thought about the dosage, refining time, flame and even space, and tried many times, but the final result was nothing.

Once those material particles enter the tripod and are refined, they will completely melt and finally disperse into a burst of mist.

"What went wrong?"

Qin Feng frowned. With his current level of alchemy, it is reasonable to say that there must be something wrong with the process.

"Is there a problem with these material particles themselves?"

But in the end, he denied the idea.

At this time, Qinglian suddenly said, "there may not be a problem with your refining method. I think there may be a problem in the separation stage!"

The magic snake frowned, and his tone became a little cold: "you mean there's something wrong with my level?"

"Who knows?" Qinglian said coldly, not empty at all.

"There must be no problem in alchemy. In that case, the problem must be someone."

"Who knows whether someone is incompetent or someone is thinking wrongly. He wants to separate the causal substances through separation, so as to resolve the causal law in his body!"

The evil snake was angry and said angrily, "since you say so, it's better for you to separate the black river and the material in it. I don't want to do this thankless thing!"

"If I come, I'll come. I'm afraid you won't do it?"

Qinglian said in a deep voice, quite an impulse to replace the magic snake and separate the black river by herself.

She doesn't believe that if the magic snake can separate the substances in the black river, she can't separate!

Qin Feng was helpless. Why did the two quarrel again?

Do they have different natures?

However, at this time, he had no time to pay attention to them. He had invested in the next round of refining and used some new methods.

"Rubbish!"

"Waste!"

"Shit!"

"A vase that doesn't work at all!"

Qin Feng's indifference naturally makes the mutual connection between the two continue, and Qin Feng can't bear it at last.

"What's the noise? If you have this time, you might as well help me think about the problem!"

"Hum!"

Qinglian snorted coldly again, expressing her dissatisfaction.

Qin Feng was helpless and strange.

Qinglian seems to be very hostile to the magic snake, and the magic snake is not a master of temper, and it is impossible to be obedient. As a result, the two often quarrel.

But why is Qinglian so hostile to the devil snake? Qin Feng is a little strange. He can feel Qinglian's thoughts, but he can't feel her inner feelings.

However, he was too lazy to think about it. The black river was the key.

"It failed again. Various methods have been tried. The problem should not be in refining. Perhaps, there is a problem in the process of separation!"

Qin Feng said in a voice, but immediately, he made up another sentence: "it's not that there's a problem with your separation technique, sir, but that it's possible that if this thing breaks away from the black river, there may be problems, such as the loss of power?"

"It's possible!" The demon snake answered, but did not deny it.

Because it's possible.

"Why don't I leave some fire breath at the same time when I separate next time, wrapped in causal particulate matter to prevent its power from passing!"

Qin Feng nodded and agreed.

Therefore, the magic snake began another round of process of separating the black river. On top of the previous technique, another step was added to wrap all particulate matter with flame, which made the sparks look gorgeous.

Then Qin Feng mixed these particles with poisonous corpse flowers and began the refining process in the ding.

This time, the process was longer than before, because he could feel that the power of those granular materials in the tripod did not pass, and the poisonous corpse flower began to slowly integrate into it, and finally gradually exert its medicine. The two were completely combined to form a purple medicine. The medicine was powerful and had the power to resolve the law of cause and effect.

"Yes!"

Qin Feng was overjoyed.

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