Don't try to cultivate immortality; mortals live longer than immortals.

As it turns out, even extraterrestrial demons, or extraterrestrial demons in a state of extreme rage, are simply unable to solve mathematical problems that are beyond their comprehension.

As a result, the poor guy was filled with all sorts of advanced mathematical knowledge.

Completely powerless to resist, this mighty extraterrestrial demon met a tragic end.

Experiment successful!

This powerful figure effortlessly weathered the most terrifying demonic invasion during the advancement process and achieved the Fusion stage!

The news caused an uproar throughout the entire Guixu.

People never expected there to be such an unconventional approach.

But it proved to be practical.

In the years that followed, people began to imitate and further develop it.

During that period, as a cultivator, I felt embarrassed to even greet people if I didn't pursue a mathematics degree while cultivating.

A double degree has almost become the standard!

In fact, it's not just mathematics; people have discovered that almost any advanced science subject has the same effect, which has led to a surge in popularity for chemistry and physics...

During that period, cultivators advanced through the ranks with exceptional ease, and the threat from extraterrestrial demons was reduced to its lowest level ever.

However, the good times did not last long.

The happy times lasted for less than 100 years.

Just as viruses and their treatments, or Trojans and their antivirus software, alternate in their evolution, the extraterrestrial demons were indeed caught off guard at first.

However, as cultivators continued to advance and fight against them using this method, the extraterrestrial demons evolved immunity.

It is unclear how exactly the other party did it, or whether the extraterrestrial demons truly understood mathematical principles and were unafraid of difficult problems, or whether they achieved immunity through other methods.

In short, the effect of doing this will become weaker and weaker until the opponent counterattacks. In the end, whoever uses mathematics, physics, and chemistry to fight against the extraterrestrial demons will be more likely to perish.

As a result, this once-famous method was gradually abandoned.

And this... is just a small episode in the battle between the cultivators of Guixu and the extraterrestrial demons.

In short, research results are not useless, but they all have limitations. They may be very good and powerful at the beginning, but as time goes by, their effects gradually weaken until they are countered by the opponent.

Duan Xuan shook his head, pulling himself out of his thoughts. He wasn't about to advance, but the threat from the extraterrestrial demons was still terrifying, especially since he had only just begun cultivating his Qi.

"Damn it, this social practice program was a complete disaster."

His face was full of regret, but it was too late to say anything then.

"Yun'er, what should we do now?"

"Host, don't panic. The rules of heaven and earth have their own limitations. Although the extraterrestrial demons are terrifying, they cannot do whatever they want. Take this secret realm for example. Only Qi Refining cultivators can enter it. Therefore, the target of the other party's possession can only be a Qi Refining level cultivator."

"You mean...?"

Duan Xuan's eyes lit up immediately.

"Um."

Lingyun nodded: "Once an extraterrestrial demon possesses a cultivator, the resulting increase in strength is far beyond what a mere vengeful demon can provide. It should be able to break through bottlenecks and reach the Foundation Establishment level."

"Foundation Building?"

Duan Xuan's face immediately fell.

Although he possesses a true Heavenly Spiritual Root, his strength is far beyond what other beings of the same level can match. According to the data fed back by the nano-spiritual energy value detector, his combat power is as high as 165, which has long exceeded the limit of the Qi Refining stage. Lingyun said that with his current strength, he could easily take on two or even three cultivators of the same level.

But Qi refining is Qi refining; Foundation Building after crossing a major realm becomes a different issue.

Even cultivators at the first level of Foundation Establishment have a median combat power of 300 points, with a fluctuation range between 240 and 360.

In other words, even if someone is just starting out in the Foundation Establishment stage, no matter how weak they are, they will still have a combat power of up to 240 points, which is no lower than that.

"Novels are all lies after all. With such a huge gap in skill level, how could anyone possibly challenge someone of a higher level?"

Duan Xuan's face turned bitter, as if the sky itself had darkened considerably.

"Alright, host, don't think too much about it. There's always a way out. The current situation is certainly difficult, but who said you have to tough it out? Have you forgotten the agreement the instructors made with you before we set off?"

"This social practice will only last for three days. You only need to survive for 72 hours, and the spatial barrier will open again to teleport you all back."

"Therefore, no matter what crisis this place may have, no matter what schemes or suicidal thoughts the extraterrestrial demons may have, those are no longer problems that you need to worry about."

"Oh right, how could I have forgotten about that?"

Upon hearing this, Duan Xuan's face immediately lit up with a look of great joy.

I really fell into a mental trap. When faced with a strong enemy, I only thought about how to solve it and fight it head-on, but I forgot that if the sky were to fall, someone taller would hold it up first. I thought that as long as I slack off and pass the rest of the time, I could still turn the danger into safety.

As this thought crossed his mind, he immediately felt relieved.

Even if we can't beat that guy, with Yun'er's help, we can find a place to hide and get through the rest of the time without any problem.

The next step is to keep a low profile. Fortunately, although we just killed over 200 cultivators from the Azure Sky Realm, the powerful array has concealed our presence, so they might not have noticed us yet.

Regardless, for the rest of my time, I need to minimize my presence.

The thought crossed Duan Xuan's mind, and he said to Ling Yun, "Yun'er, can you help me contact Zhou Ran and remind that guy to find a place to hide quickly and stop fooling around outside?"

If it were someone with an overflowing sense of justice, they would definitely try to notify all the classmates from Guixu at this time. But Duan Xuan has no interest in being a savior. If he could, he would naturally take care of his companions. But in the current situation, with so many people talking, if the news were to leak out, it would only increase the crisis he was facing.

Duan Xuan isn't that stupid.

When poor, one should cultivate one's own virtue; when successful, one should benefit all under heaven. Although we all came from Guixu, I and those college students were, after all, just unfamiliar strangers.

"Oh, and Jiang Yaoguang too, inform her as well."

Duan Xuan hesitated for a moment, then added that sentence.

After all, they are classmates, so it would be unreasonable to completely ignore them.

"it is good."

Lingyun agreed readily, but the little girl had her own plans. She knew that Zhou Ran was the host's friend, and that the boy would definitely inform him.

As for Fairy Yaoguang... pshaw, the host may not know her background, but Lingyun knows it all.

Those were companions placed by the Nascent Soul stage monsters beside their hosts.

As a dignified Golden Core Ancestor, why would I care about her life or death? Besides, this woman is just a wisp of her soul attached to a divine-level Xuan puppet. Even if she perishes, it won't be a big deal. There's even less reason for me to go through all this trouble!