The system gives me immortality, and I will eventually become invincible while I’m alive.

A few more hours passed, and the alchemy was full of waste liquid, and not a single one was successful. Chen Xun remained calm and began to analyze in concentration.

"These elixirs of heaven and earth are really strange. Different years, but the gap is so big."

Chen Xun secretly thought that the same base-building auxiliary medicine, but the age was only ten years different, already needed another kind of heat and technique.

This is completely different from when he was refining the Heavy Feather Pill and the Yiqi Pill. The control of the fire was accurate to the year. No wonder he couldn't refine it during the Qi Refining Period.

It is estimated that this elixir requires the use of legendary divine consciousness to fully control it, which greatly increases the rate of elixir formation.

"But what I don't lack most is elixir and time." Chen Xun showed a faint smile, feeling very interesting in his heart and not feeling discouraged by failure at all.

Chen Xun spent his time refining elixirs every day. He began to refine no more than five elixirs a month. When he failed, he began to record his experiences and feelings, and began to enter trance to explore the feeling at that time.

……

Spring passes and autumn comes, and another year passes by in a hurry. In the medicine valley, the western season is Changchun, and the years seem to have left no trace on Chen Xun and Da Hei Niu.

In the secret base, the big black cow looked at Chen Xun's alchemy furnace with great energy. A scent of medicine floated in, and it kept sniffing the cow's nose.

"Moo~~!!" The big black cow suddenly became excited. Chen Xun had been working really hard this year, but it couldn't help at all and could only cultivate the elixir.

A spiritual medicine was finally refined by Chen Xun, but there was only dullness in his eyes without any hint of ecstasy.

"Everything is under my control." Chen Xun's eyes were calm, but he gradually began to twist his mouth, "The foundation-building elixir is nothing more than that, easy to handle."

"Moo~" The big black cow kept circling Chen Xun and yelling, he is so awesome, he deserves to be my big brother!

"It finally feels right."

Chen Xun stood up slowly and exhaled a deep breath, "Old Niu, we have a chance to build the foundation!"

"Moo!!" The big black bull jumped on Chen Xun in excitement, and the latter finally couldn't hold it any longer and burst out laughing.

Everything is difficult at the beginning, but finally we took the first step.

【Ding! The host can add points. 】

"Old Niu, add more, add more!" Chen Xun patted the big black bull on the head, "Finally we can try our defense."

"Moo~" The big black cow stood aside and stared at Chen Xun, it was ready.

They began to add more points, first to the defense, and a heavy force spread throughout their bodies. At the same time, they felt as if their bodies suddenly tightened.

"Oh, that's good." Chen Xun raised his eyebrows and looked at his arms. Although there was no change in appearance, it obviously felt a lot harder...

"Moo?" The big black cow turned left and right, doubts in his eyes.

"Old Niu, let's not hurt ourselves, let nature take its course." Chen Xun was shocked. Why did this old Niu feel like his chest was about to be broken?

"Moo~" The big black cow grinned. It did have some ideas.

"Let's go to the sect hall to get our 200 contribution, and then go watch the sect competition. I heard that many powerful junior brothers and sisters have emerged and come back to continue refining medicine."

"Moo~"

One person and one cow went down the waterfall with swords, then took a lot of fried melon seeds from the cave and headed out of the Medicine Valley.

In the following years, every year, a man wearing a straw hat would lead a big black cow wearing a straw hat to the competition venue. They never participated in the sect competition, but only ate sunflower seeds in the shade of an uninhabited tree.

They seemed quite happy, as if they no longer pursued strength. They kept shouting and chasing after the strong ones. After the competition, they silently went down the mountain. They were quite kind-hearted.

As long as someone looks at them, they will be greeted with a very warm smile, and they will always give way to others when walking, which creates a strong impression in people's hearts.

No one knows his name, and he seems to be unsociable, with few friends in the sect. In one song, he is alone and holding a black bull spirit beast, like an invisible man.

Years pass by in a hurry, and when we look back, the past years are gone, taking in all the bitterness and sweetness of the wind and rain, and the ten years pass quietly.

Chen Xun and Da Hei Niu have been in Wuyun Sect for more than 20 years. Many major events have happened in the sect, and the collision between Qianguo Xianmen and Wuguo Xianmen has become more and more intense.

The road to cultivating immortals is like sailing against the current. If you don't advance, you will retreat. Qian Country has many resources needed by Wu Kingdom to cultivate immortals, and Wu Kingdom also has the resources Qian Country needs to cultivate immortals.

Inside the Medicine Valley, in the cave behind the waterfall.

Chen Xun and Da Hei Niu were just members of the crowd. They had no influence on the general trend and could only go with the flow and devote ten years of their longevity points to defense.

However, it was also said that the quarrel was just verbal and had not yet reached the stage of action, but these low-level disciples did not think so, and rumors were flying everywhere.

"Old Niu, why does it feel like there's going to be a fight?" Chen Xun frowned slightly and looked at Da Hei Niu, "What should we do if the Wuyun Sect comes..."

"Moo?" Da Hei Niu was a little flustered. These low-level disciples were making alarmist remarks every day, and rumors were everywhere, saying that there might be a war among immortal cultivators every thousand years.

"Damn it." Chen Xun cursed in a low voice. The fight for resources really happened in every world. The key was what they, the common people, did.

There would be no benefit if they won, and if they lost, they might even lose the sect. Moreover, their group of low-level disciples didn't know what the development of the two immortal sects was now.

"Moo~~" The big black bull humped Chen Xun, its head constantly pointing into the distance.

"Run away? That's not possible. At least you have to help the sect kill a dozen or twenty foundation-building monks."

Chen Xun shook his head suddenly, wiped his mouth after eating and left, then are they still human? "Unless our Wuyun Sect really can't resist, we will fight to the death with Wu Guo!"

His eyes suddenly became sharp. Wuyun Sect had long been their home. Unless hundreds of golden elixir-level monks came to attack them, they would beat them to the point where their mother wouldn't recognize them.

"Moo~Moo!" The big black cow jumped up and down. It didn't mean that. It kept shaking its head and even picked up a stone and started writing.

Chen Xun narrowed his eyes slightly and patted his head. It was him who had preconceived the idea. It turned out that the big black cow meant: Those big shots in the distant country of Qian are not fighting yet, so why are we worried about it?

"Hey, it seems so. The top ten immortal sects will bear the brunt of the attack. Our Wuyun Sect has no news at all now, haha, hahaha."

Chen Xun suddenly laughed and felt extremely comfortable. Rumors are so harmful. He almost thought that Wuyun Sect was the center of the world...

Da Hei Niu rolled his eyes at Chen Xun. Sometimes he thinks too much, and there will always be a day when his cleverness is mistaken for his cleverness.

"However, Lao Niu, we have to be prepared for danger in times of peace." Chen Xun coughed lightly, "No matter how much you can contribute to the sect, you must at least have the strength to protect yourself."

"Moo!" The big black cow nodded heavily, and his eyes became solemn. If it really got into a fight, it could only fight within its own capabilities and never show off. This is what Chen Xun taught it.

Chen Xun smiled slightly. He thought he was not a saint. He accumulated anger, soared into the sky, and blew himself up at the golden elixir stage monks. For the sake of the Five Yun Sect, he really couldn't do this...

Their eyes suddenly looked down at the alchemy furnace. There were five glistening white pills inside, and there was even a green leaf-like pill pattern on it.

After spending ten years, Chen Xun finally refined all the elixirs of the Foundation Establishment Pill, but the most important thing was his familiar alchemy technique, but the result seemed not that important anymore.

They didn't understand what this pill pattern was, and the Foundation Establishment Pill was completely different from the one sent by the elder, and they didn't know why.

"Old Niu, prepare to build the foundation."

"Moo!"