Wu Yan quietly entered the Yunhai Cave, carefully checked the traps of the two caves, and found nothing abnormal, then walked to an inconspicuous corner and removed a stone in the corner. After removing the stones, there was a pile of rubble that looked unmistakable.

Wu Yan carefully pushed away the rubble, revealing a small iron ring. He lifted the hoop upwards and pulled out a small metal box. After some complicated unlocking techniques, the box suddenly clicked and opened. Wu Yan breathed a sigh of relief, took out the small cloth bag containing the mysterious green soil from the small box, and walked to the corner of the medicine field.

He poured out a small half of green soil from a small cloth bag, his eyes swirling around on the green soil in his hand and the more than twenty strange herbs that exuded a strange fragrance in the corner of the medicine field, and his face showed a look of determination and pain. He buried a small half of the green soil evenly under the more than 20 strange grasses.

After doing this, Wu Yan carefully put the cloth bag back into the small box, put the small box back in its place, covered it with gravel blocks, and then covered it with a large stone.

Wu Yan began to get busy in the Yunhai Cave without touching the ground. He placed all kinds of strange tools on the table in the cave, and then from a large sunny stone outside the cave, he took a pile of dried auxiliary herbs, and began to grind them into powder, ready to prepare several medicines.

There are a total of four drugs he will prepare this time. There are two kinds of strange poisonous drugs, one is called "Heart Beat" and the other is called "Zhu Yan Zheng".

These two poisons are recorded in the second half of the "Book of Medicine" and are said to have been lost for nearly a thousand years. Wu Yan believes that I am afraid that even the owner of the "Book of Medicine", Feng Pharmacist, may not be able to prepare these two poisons.

"A heartbeat", you can see from the name that this poison is powerful. As the name suggests, anyone who is poisoned by this kind of poison will die of poison as soon as his heart beats. If there is no antidote, if the poisoned person does not want to die immediately, he must control his heart and make it stop beating. But once the heart stops beating, how can a person still be alive? This seems to be a paradoxical thing, but in fact there are people who can do it.

It is said that more than 1,000 years ago, after this poison was developed, a strange man fell for this poison. He probably knew the power of this poison, but coincidentally, he had cultivated a turtle breath skill, which could really control his heartbeat. He was stunned that he survived with this miraculous skill, and finally asked his master to help him find an antidote and cure the poison.

However, there are very few strange people like this in the rivers and lakes after all. That turtle breath gong, even if someone practices it, may not be like that strange person, who can really make his heart live without beating at once.

Wu Yan was convinced that Pharmacist Feng would definitely not be able to prepare this poison, because the three-flavor main medicine required to prepare this poison required required was a poisonous herb that had grown for hundreds of years. The growth cycle of ordinary poisonous weeds is only more than half a year, how can there be poisonous weeds that can grow for hundreds of years?

The plants and trees that can grow for hundreds of thousands of years in the legend are not spiritual creatures, and they will never appear in the world.

Fortunately, the poisonous herbs used in the main medicine of the three flavors are all found on the cliffs of the Thousand Grass Valley. The more than 20 strange grasses that exuded a strange fragrance planted in the corner of Wu Yan's Yunhai Cave were the ones he had secretly found on the cliffs of the Thousand Grass Valley in the past month. Each of these poisonous weeds is the kind of poisonous weed that can grow for hundreds of thousands of years.

The reason why these poisonous weeds could not grow for hundreds or even thousands of years was not due to their properties, but because the Thousand Grass Valley was not the kind of place where they could grow for a long time. If nothing else, the grass will grow for years at most before withering and dying. I really don't know how these strange grasses grow here.

Wu Yan has the mysterious green soil that can ripen the herbs and grow rapidly, so naturally he can get the mature bodies of these more than twenty strange poisonous weeds.

As for the poison "Zhu Yan Zheng", to be honest, it is a poison that people love and hate, especially for women.

Who in the world doesn't want to be beautiful forever and be young? But who can?

I'm afraid this is the wish that everyone will dream of since human beings have a sense of beauty and shame. However, there is nothing difficult in the world, only those who are afraid of it. There are people who have found a way to keep their faces in their youthful state. This person is the one who invented the poison "Zhu Yan Tribulation".

More than 600 years ago, there was a great sect on the rivers and lakes, the Easy School. The head of the free faction, Xiaoyaozi, is suave and handsome. I don't know how many women love him. But he loves his little sister Zhu Hongyan alone.

This vermilion face is indeed born with a beautiful crown, and was praised as the first beauty in the world by the Jianghu people at that time. Xiaoyaozi and Zhu Hongyan's brother and sister, from the same school, childhood sweethearts, were praised as "love sword double walls" by the Jianghu people at that time.

It's a pity that the years are ruthless, the rivers and lakes urge people to grow old, after the two of them stand up, Xiaoyaozi is becoming more and more mature and handsome, but Zhu Hongyan is a little old and decrepit. For this reason, Zhu Hongyan once thought of leaving Xiaoyaozi, finding a corner that no one cared about alone, and slowly growing old. How could the infatuated Xiaoyaozi allow such a thing to happen? He tried his best to develop a drug that could make people look forever.

After nearly ten years of hard work, he finally succeeded in developing it. The ecstatic Xiaoyaozi named the drug "Hongyan" and gave it to Zhu Hongyan. At this time, Zhu Hongyan, who was almost forty years old, thought that she had been worried for a long time, and her face became haggard, describing her old age. However, after she took this medicine, she actually regained her appearance when she was twenty-eight years old in just one day.

After the advent of this drug, it once set off a bloody storm in the rivers and lakes at that time, and the Loose Sect was almost wiped out. In desperation, Xiaoyaozi retired to the rivers and lakes with Zhu Hongyan, and disappeared far away.

The two disappeared, but the prescription of "Zhu Yan", which can make people look forever, has been circulated. For a time, there were countless handsome men and women of the age of old monsters in the rivers and lakes, and the entire rivers and lakes were once nondescript.

But it didn't take long for anyone who took "Zhu Yan" to become crazy and become a murderer in just one year, and then broke out in a tragic incident of collective poison and decaying and dying piece by piece. At this time, people realized that "Zhu Yan", a drug that exists against the sky, turned out to be a very vicious chronic poison.

Later, with the degrading incident that changed the color of the people in the rivers and lakes, the poison of "Zhu Yan" was changed to the name of "Zhu Yan Tribulation", which was used to pay tribute to those predecessors who died because of it and to warn future generations.

Many descendants of the masters of the rivers and lakes who took "Zhu Yan Zheng" began to look for Xiaoyaozi again, trying to find him to take revenge and vent their anger. Of course, they may still have a glimmer of hope, maybe there will be an antidote to neutralize this poison from Xiaoyaozi?

It's a pity, I don't know whether the Xiaoyaozi couple also died of poison, or if they had an antidote to reconcile and completely disappeared. This event gradually became a legend.

The reason why Wu Yan wanted to prepare the poison "Zhu Yan" was purely out of fun. However, deep down in his heart, there may be a faint expectation that if he can formulate an antidote that can reconcile "Zhu Yan Tribulation", so that the person who takes it does not have to worry about dying of poison, but can always maintain his appearance, wouldn't it be very interesting?

Who doesn't want to stay young forever?