Mortal: I became invincible after becoming sworn brothers with Han Li.

"senior……"

Just as Li Yunfan was about to say something, he was interrupted by the Core Formation female Han Chi raising her hand, and then he heard her slowly speak.

"Don't worry, I no longer have any intention of killing you. I will also answer all your questions."

Li Yunfan frowned; he hadn't expected this situation.

Seeing that the other party was still somewhat wary, the female demon smiled and began to explain to Li Yunfan in a kind tone.

"Actually, I did initially plan to eliminate you after you obtained the 'Frostbite Pearl,' since once you returned to the surface, there was no guarantee you wouldn't spread the word about our clan's existence. If that attracted Core Formation and Nascent Soul cultivators, our clan would be on the verge of extinction!"

He paused for a moment after speaking, and then continued.

"However, after you saved Bing'er in the icy pool, I changed my mind. If I'm not mistaken, you not only possess flames within you, but also a special fire-attribute spiritual body, right?"

Li Yunfan's pupils contracted, and he was even more shocked.

How did the other party see through my Fire Spirit Body? With their cultivation level, they shouldn't have been able to detect it without close-range examination!

The female demon chuckled, "Actually, after seeing your and Bing'er's condition in the Cold Pool that day, I had some guesses in my mind. It wasn't until I returned to the temple and checked the records again that I finally confirmed them!"

She then recounted to Li Yunfan everything she had found about the Spirit Fire Body and Bing'er's physique, word for word.

It turns out that the female demon Bing'er also possesses a special spiritual body called the "Ice Marrow Cold Spirit Body"!

The Cold Demons are born with a cold constitution, and the Ice Marrow Cold Spirit Body is a mutated constitution among them. Although it produces icy energy in its body like ordinary Cold Demons, the difference in strength between the two is not small.

Moreover, the cold energy generated by the Ice Marrow Cold Spirit Body cannot be used for its own cultivation at all. Even when it reaches the Nascent Soul stage, this cold energy cannot be used by itself.

Most importantly, the higher the cultivation level of the Frost Demon Clan members who possess the Frost Spirit Body, the stronger the extreme cold energy emanating from their bodies will be!

Hearing this, Li Yunfan finally understood why the female demon Bing'er had been frozen into an ice sculpture that day.

"But what does this have to do with my physique? And why did you say I would miss the chance to advance to the Nascent Soul stage?" Li Yunfan asked with a slight frown.

"I'll explain that to you later..." The Core Formation female demon Han Chi replied with a smile, and then continued to tell Li Yunfan about the Ice Marrow Cold Spirit Body.

Upon hearing this, Li Yunfan could only suppress his curiosity for the time being and listen quietly to the other party's story.

The Ice Marrow Frost Spirit Body has appeared quite a few times in the history of the Frost Demon Clan, but the vast majority of them died at the Core Formation stage. Even when the Nascent Soul experts of the Frost Demon Clan intervened to help, they were unable to save them when the frost erupted.

It is precisely because of this characteristic that the Hanchi clan believes that if a member of their clan has this constitution, then there is only one path left: to wait for death!

However, due to an accident, the Hanchi clan finally discovered the power of the Ice Marrow Cold Spirit Body.

It turns out that if the Ice Marrow Cold Spirit Body can cultivate together with the Fire Attribute Body, it can borrow the Fire Attribute Spiritual Power in the other's body to reduce the intensity of the cold energy, making the cold energy in the body an assistant rather than a deadly thing!

However, ordinary fire-attribute physiques can only be used temporarily. Once the Ice Marrow Cold Spirit Body breaks through to the Core Formation stage, the opponent's fire-attribute spiritual power will be unable to resist the cold air, and may even be directly frozen!

Through the continuous research of the ancestors of the Hanchi clan, they finally found a fire-attribute spirit body that could rival the Ice Marrow Cold Spirit Body. That is the Fire Spirit Primal Body, which is far more powerful than the Fire Spirit Body and the Flame Spirit Body!

As long as their cultivation levels are not several realms apart, the fire elemental power of the Fire Spirit Body can contend with the cold energy of the Ice Spirit Body.

The two can even complement each other perfectly, greatly benefiting both of their cultivation!

However, the Hanchi clan is born with a cold body and cannot cultivate fire-attribute spiritual power, let alone be born with such a fire-attribute spiritual body. They can only look for people of other races.

"Back then, our clan found a member of another race who possessed the Fire Spirit Body and had him cultivate alongside a member of our clan who possessed the Ice Marrow Cold Spirit Body and had never cultivated before. In less than three hundred years, the two of them broke through to the Nascent Soul realm!"

After finishing speaking, the Core Formation female demon Han Chi smiled slightly, a strange look appearing in her eyes as she looked at Li Yunfan, before speaking again.

"Now you know what this has to do with you! As long as you cultivate with Bing'er, with ice and fire complementing each other and yin and yang in harmony, your chances of advancing to the Nascent Soul stage will be much greater than if you cultivated on your own!"

Li Yunfan was shocked; he had never heard of such a thing before!

Taking a deep breath to suppress his shock, he tried to maintain a calm expression and asked, "It's not that I don't believe you, senior, but this matter is simply too unbelievable. Furthermore, I've never heard of any 'Ice Marrow Cold Spirit Body' on the surface!"

"These are all secret records of my clan, so naturally you couldn't possibly know them. Even I only found out after carefully reading through them. As for why there are no records on the ground, I have no idea," the female Hanchi said, shaking her head helplessly.

After saying that, he couldn't help but laugh at himself: "Our clan has always lived deep underground. People on the surface may not even know that our clan exists, so how could they know these things..."

Seeing this, Li Yunfan gradually lowered his guard, realizing that what the other party said did make sense.

Moreover, what she said didn't sound like something she made up suddenly. The other party couldn't have started making up these things months ago just to kill a Foundation Establishment cultivator like herself!

"Alright, I've told you everything I need to tell you! Now it's your choice: refuse Bing'er or cultivate with her. If you agree, I'll let you go; if you don't, for the safety of my clan, I have no choice but to..."

As the Core Formation woman Han Chi finished speaking, her eyes suddenly turned cold, and a murderous intent locked onto Li Yunfan, as if she could take his life at any moment!

Li Yunfan, who was being targeted, felt a chill on his neck, and his expression changed slightly.

The killing intent released by the other party was very pure. In just an instant, he knew that the other party was not joking. Even if his daughter would be harmed because of this, she would not hesitate to take action!

His thoughts raced, and after a long while, he finally let out a long breath, released Nü Hanchi Bing'er's arm, and completely relaxed.

He bowed to the Core Formation female demon, Han Chi, and said calmly, "This junior accepts, senior!"

Upon hearing this, the Core Formation female demon Han Chi's eyes softened instantly, and the killing intent she had been releasing vanished without a trace. She smiled and said to Li Yunfan.

"Alright! In that case, I'll send you back to the ground after we leave the cave!"