According to legend, night and day rotate and alternate in this world, sometimes it is bright for tens of thousands of years, and sometimes it is dark for tens of thousands of years. The war between light and darkness runs through the entire history. When Haotian wins, it is the bright world today, and when Hades wins, the underworld arrives.
The underworld invades, there is no scorching sun during the day and no stars at night, the world becomes extremely cold, and the creatures on earth can only rely on geothermal energy for heating. At that time, volcanoes, hot springs and heat currents in the South China Sea will become the most precious resources, and countless wars will take place there.
The war would not last too long, and most people would die because of hunger, cold, and desperate fighting. It would be an unimaginably cold and realistic world. After several decades, the entire land would become unusually quiet, as if it had entered a deep sleep from which it would never wake up. Whether human or animal, only the strongest and most resolute ones would survive.
These cold and dark times are called the Dharma Ending Age in Buddhism and the Descent of the Underworld in Taoism.
In the academy, the teacher used to call it... Eternal Night.
The half-broken Taoist priest was blasted into half a stick of charcoal, but the matter did not end there.
This big situation seems to have started fourteen years ago.
Otokogawa looked at the corpse in front of him, and kept analyzing the information about the invasion of the underworld, the coming of the son of Hades, and the eternal night in his mind...
Naturally, this battle outside Chang'an City could not be hidden from the people at the South Gate of Haotian and the practitioners in the academy.
Soon, Li Qingshan, the leader of the South Gate, and Yan Se, the talisman master, arrived, while on the academy side, the second master Jun Mo appeared on the barren mountain.
Arrived almost simultaneously.
"Mr. B, are you okay?"
Yan Se knew Yi Xiaochuan's strength. Looking at the battle scene just now and the chaotic scene around him, this was a battle between great practitioners who had surpassed the fifth realm!
"I'm fine. A seriously injured and dying Taoist priest can't faze me. He said he was from Zhishou Temple. Do you know him?"
"Was that light just now the apocalypse?" Mr. Er was wearing a tall crown as always, his body was straight, and the sword in his hand was also broad, straight and square.
“It should be.”
Mr. Er looked puzzled and asked, "Why are there two revelations?"
"Because... there's another one that I used!"
"… "
Mr. Er walked a few steps forward and looked at the corpse that was scorched by lightning. He asked in confusion, "This injury... looks like it was caused by Junior Master's Haoran Sword..."
Yan Se looked at the corpse for a long time, raised his head and said in a deep voice: "This person is Taoist He from Zhishou Temple. He was severely injured by Mr. Ke back then. I didn't expect him to be alive today, and he still has such fighting power. Haven't they... not come down the mountain for more than 20 years?"
"Oh, it turned out to be them! A bunch of rats who actually dared to show up in Chang'an."
"But now you are here, not only in the Tang Dynasty, but also ready to step into Chang'an City." Li Qingshan looked solemn, and then said to Yan Se: "Brother, what exactly did you hide from me? Aren't you going to tell me now?"
"It's nothing big, and there's nothing to hide. I just asked Mr. Yi to prepare to refine the Tongtian Pills. The master also agreed." Yan Se said lightly.
"Tongtian Pills? That is the secret medicine of Zhishou Temple. Even Zhishou Temple doesn't have many pills..."
"Since our predecessors were able to refine it, we can also copy it." Yan Se said.
The look in Li Qingshan's eyes when he looked at Yi Xiaochuan was very different.
…
The mountain behind the academy.
After failing more than twenty times, Han Li respectfully placed several small bottles in front of Yi Xiaochuan.
"Master, according to what Chen Pipi said, the pill we refined this time has 80% of the efficacy of Tongtian Pills. As long as we experiment a few more times, we can refine the perfect Tongtian Pills."
"Eighty percent? Well, how about mass production?" Yi Xiaochuan took out a black pill, put it into his mouth, closed his eyes and felt it. The Tongtian Pill gradually melted in his stomach, turning into a refreshing medicinal power like a spring stream, flowing slowly in the body, nourishing the internal organs layer by layer, and even to the sea of consciousness and dantian.
"The materials are insufficient. Even with the help of the Palm of Heaven Bottle, I can only refine one pill every two days. However, this pill is really strong. I have already successfully established my foundation. Master, what should I do with the subsequent exercises? I can't learn the Snow Mountain Qi Sea in the academy!"
Han Li rubbed his hands and waited for Yi Xiaochuan's instructions.
"Some of the cultivation theories in the academy are worth learning. Although the paths are different, you should also know that all methods return to one, and different paths lead to the same destination. Those theoretical knowledge will be very helpful for your future study of Taoism. You should first experience it in the back mountain of the academy. You don't need to make any progress in your cultivation. There are no panaceas. You are not inferior to others in cultivation, but you need to work hard on your understanding and Tao heart. This will be of great benefit to your future development."
"Yes, Master, I will study hard!"
Xiao Yi nodded. This disciple is a good one!
Although his talent in Taoism is average, his luck is very strong and his talent in alchemy is not bad. More importantly, the "Heavenly Bottle" recognizes him as its master, so he will be indispensable in the future for spiritual medicines.
After taking a few bottles of pills, Xiao Yi said, "Since the Tongtian Pills have been copied, I will use them to experiment to see what substance promotes the change of human bone quality. The efficacy of the Zhangtian Bottle cannot be mass-produced. Now is the time to use the power of science and technology. I will be back in a month at most, or ten days at least. The back mountain of the academy will be safe. When I come back, we will go to Yue State to choose a method for you..."
…
Penglai off the coast of Magic City.
In a heavily guarded laboratory.
Yi Xiaochuan hadn't slept for three days and three nights, and his slightly bloodshot eyes stared at the experimental data.
"Eva, is the comparison certain that it is the same substance?"
Master, pregnant women will secrete CPH4 in the sixth week, and the amount of secretion is very small. For babies, the energy it contains is like an atomic bomb. It is this substance that provides the necessary energy for the formation of the fetus's skeleton and acts on the fetus's brain development. It has an extremely magical property.
It is an important existence that gives human mind, but for adults it is a drug that can be fatal if inhaled in small amounts.
There is a small amount of CPH4 substance in Tongtian Pills, which can play a role in secondary evolution and development through unknown auxiliary medicinal properties.
This unknown auxiliary material requires further experimentation...
"So, can CPH4 be produced in bulk?"
Although the chemical structure of CPH4 is complex, it can be synthesized. In the Force World, the Kaminoans discovered and synthesized this substance, but they did not successfully apply it to human evolution, and almost all experiments failed...
"But Tongtian Pill was successful!"
Another day passed, and in front of Otokogawa stood a small pile of something crystal-like like sapphires.
cph4!
It is also the core substance of Tongtian Pills to transform the human body's bones.
However, if Otogawa wants to use it, further research is needed.
For this research process, Xiao Yi decided that he should be more ruthless...