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

At this moment, Li Qingzhou's face was blank, his face was unusually flushed, and he kept muttering to himself.

"A Heavenly Spiritual Root... My daughter actually has a Heavenly Spiritual Root!"

The two elders were so excited that they danced with joy. Even Li Heng showed a look of excitement on his face. After all, the stronger the Li family was, the more cultivation resources he could obtain, and perhaps he would even have the possibility of advancing to the Core Formation stage in the future.

"Elders, Father, only Mother and I know that Yun Shu possesses a Heavenly Spiritual Root. This matter must be kept strictly confidential and must not be leaked. We will consider Yun Shu's cultivation path after I join the Luo Yun Sect and successfully advance to the Core Formation stage. For now, let her play around for a while longer!"

Upon hearing Li Yunfan's words, the two clan elders and Li Qingzhou all frowned. In their opinion, Li Yunshu should start cultivating as soon as possible, without delaying for even a moment.

However, Li Yunfan is not only the most powerful cultivator in the Li family, but has also made great contributions to the Li family. He is also the only person in the family with the hope of forming a core. Even the two elders cannot directly refuse his idea, and must carefully consider it.

Seeing his father and the three elders deep in thought, Li Yunfan immediately guessed what they were thinking, and slowly told them his idea.

"Alright, since Yun Fan has thought everything through, we two old folks won't say any more. Let's do it your way!" The black-robed elder, Li Lie, took a deep breath and finally settled the matter.

Upon hearing this, Li Qingzhou, though still harboring some reservations, had no choice but to nod in agreement, while Li Heng had no objections whatsoever.

With the matter settled, everyone left the side hall one after another and headed towards their respective rooms. However, before leaving, Li Qingzhou asked one last question.

"Did you kill the mad cultivator Yue Tian?"

Seeing Li Yunfan nod, the four men's eyes lit up, and they made an accurate assessment of Li Yunfan's strength. They left the side hall with great joy.

After that, Li Yunfan stayed in the family. He wanted to complete the tempering of the Yellow Spring Poison Fire first, and at the same time ask the family to help collect some materials for making puppets so that he could make more puppets.

On the one hand, he needed to prepare some for himself, and on the other hand, he could leave some for his family to use. In the process of refining, he could also improve his puppetry skills again, which could be described as killing three birds with one stone.

Before we knew it, seven months had passed quietly.

During this period, he would emerge from seclusion every ten days or so to talk to his mother and play with Li Yunshu for a while before returning to the stone chamber to continue his cultivation.

At this moment, in a stone chamber deep within the Li family compound, Li Yunfan was dragging the fully tempered Yellow Spring Poison Fire, scrutinizing it with a somewhat strange expression.

The spirit fire is now vastly different from what it was before. Not only has it turned a dark yellow, but a faint black flame can also be seen rising from its center.

"No wonder Yue Tian's poison took effect so quickly that day. It turns out that after this spiritual fire devoured the poisonous cloud of blood poison, it absorbed the deadly poison contained within it..." Li Yunfan stared at the poisonous fire in his hand and muttered to himself.

Through his tempering, the fire poison of the Yellow Spring Poison Fire itself and the poison of the absorbed poison cloud completely merged together, becoming an even more potent fire poison.

"I just don't know if this poison can instantly kill a Foundation Establishment cultivator..."

Thinking of this, Li Yunfan couldn't wait to find a Foundation Establishment cultivator to verify his idea. However, he could only think about it; he couldn't very well ask his father or clan elders to conduct experiments on him!

He clenched his fist, drawing the poisonous fire back into his dantian, and then took out a book made of animal hide from his storage bag.

He found this in Yue Tian's storage bag. After examining it, he discovered that the animal skin book contained a body-refining technique called "Devouring Spirit Undying Body". After studying it, he finally confirmed that Yue Tian was practicing this technique!

The cultivation method for this Soul-Devouring Undying Body is extremely unique. It involves fusing the essence and blood of demonic beasts into one's flesh to enhance the cultivator's physical body. However, before fusing, some special spiritual herbs need to be added to refine the essence and blood of the demonic beasts, reducing the difficulty of cultivation and improving the body-refining effect.

At the very end of the cultivation manual, there is another quick cultivation technique that allows one to refine the essence of demonic beasts directly into one's flesh without needing to refine their blood essence, thus achieving the same body-refining effect.

However, this quick-learning technique is extremely risky. Once you start practicing it, you will be influenced by the demonic intent contained in the blood essence. The more types of blood essence you absorb, the greater the influence. In the end, you may become mentally unstable, or even have your soul confused, turning into a humanoid demonic beast that only knows how to kill.

However, this secret technique is extremely powerful, and it can also draw upon the essence and blood within the body through special incantations to instantly enhance one's strength and transform into a half-human, half-demon form.

Yue Tian cultivated this secret technique, and it was because he was influenced by the demonic beast's will contained in his blood essence that he earned the reputation of a mad cultivator by relying on his strong physical body.

As Li Yunfan flipped through the animal skin book in his hand, he frowned slightly, pondering whether he should cultivate this technique.

"Cultivators who cultivate both physical and spiritual bodies are absolutely unique in the cultivation world. However, the difficulties involved are also immense. Not only does it severely test a cultivator's talent, but it also requires resources several times greater than those of other cultivators of the same level in order to steadily improve."

"With my Fire Spirit Body, my talent in cultivation is already top-tier, and my cultivation speed is in no way inferior to that of cultivators with Heavenly Spirit Roots. If I were to cultivate body techniques as well, my cultivation time would be extended by one or even two times..."

After thinking for a full quarter of an hour, he finally made up his mind that after joining the Falling Cloud Sect, he would begin to cultivate the Soul Devouring Undying Body!

Having made up his mind, he flipped his hand and put the animal skin book back into his storage bag, then stood up and walked towards the entrance of the stone chamber.

It's time to leave the family and head to the Yunmeng Mountains!