Zhang Xiaoyan stood in the depths of the retreat cave hall, closed all the five-fold stone doors, and then said to the ancient saying: "This kind of Dan is an opportunity to seize heaven and earth, and it is jealous of heaven and earth, once Dancheng will have a symbiosis of heaven and earth, trying to destroy the pill, so it must be refined in this kind of place with absolute protection, and when Dancheng is completed, I also need Gu Yu to help me temporarily block the sudden gathering of heaven and earth fire, until my consciousness awakens!"

When Gu Yu heard this, he felt even more strange, and said, "It's so serious, and you have to wait for your consciousness to wake up, will you still fall into a drowsy when you refine the pill?"

Zhang Xiaofang nodded, and said: "The effect of this pill has surpassed the resurrection of the dead, it cannot restore the seriously injured inside and outside the body, but also repair his meridians and souls, this is an inversion that is not allowed between heaven and earth, so I must be silent into the pill body and compete with the spirit of heaven and earth, so as to ensure the effectiveness of the pill!"

Gu Yu nodded in surprise, she couldn't figure it out at all, and she couldn't imagine that alchemy would be so mysterious and complicated, but she knew the danger of refining this pill.

"Don't worry, I will do my best to help you refine the pill!" Gu Yu looked firm.

Zhang Xiaomad took out a pill from the Yourong sachet, handed it to Gu Yu, and said: "To refine this pill, you must have absolutely reliable people to help, and you are the person I trust the most, so I asked you to help me, but the thunder and fire at the time of Dancheng are very fierce, in order to avoid you being harmed, you need to take this pill first, so that you can be safe!"

As soon as Gu Yu got the elixir handed over by Zhang Xiaomad, he suddenly felt a chill in his skull, and almost got rid of the elixir and fell to the ground.

She was originally a person who practiced "Jade Cold Silence", and she had a strong immunity to cold qi, so she really couldn't imagine that a pill would make him almost unbearable.

"This ...... What kind of Dan is this, how can it be...... How could it be so cold?" asked Gu Yu.

Zhang Xiaofang said: "This elixir is called 'Pure Yin Spirit Knot', it is a cold thing in the world, after my refining, it will not hurt your body after taking it, but it will weaken your life, but if you want to deal with the thunder and fire, it can just play an unexpected role, because the thunder and fire are the power of the yang, even if you want to hurt you, it will be offset by the pure yin qi emitted by this pill, but you must remember that you can only take it on the sixth day, if you create it, it will damage your life, and if it is late, the medicine is not strong enough!"

Gu Yu believed in Zhang Xiaomad, put the pill into the Yourong sachet, and watched Zhang Xiaomad start refining the pill.

There are thousands of medicinal materials in Zhang Xiaofang's Yourong sachet, he almost used them all, and he also used the magic weapon Lingyun, for three consecutive days, Zhang Xiaofang did not stop at all, gradually refining thousands of medicinal materials into medicinal essence, and then fused into one, and then with a certain amount of magic weapon Lingyun Qi, blended together, forming a lantern-sized multicolored ball of light in Zhang Xiaofang's chest.

Zhang Xiaofang released blue mana with both hands, surrounded the ball of light, closed his eyes, and began the refining process of silence in the Dan body.

Gu Yu was guarding from the side, infusing Zhang Xiaofang's subtle expression, he could see the risk of refining this elixir, for fear that Zhang Xiaofang would have an accident.

Time passed day by day, and the ball of light between the mana of Zhang Xiaofang's hands shrank more and more, until the sixth day, it finally shrunk into a blood-red elixir the size of a thumb, and its periphery seemed to be shrouded by a layer of manic flames, through the external manic flames, its interior was like a raging wave, endlessly rolling, and its color was also red, red like blood.

When the inner fury of the elixir touched the flames outside the elixir, it would make a loud sound, and a cloud of red gas would rise, quickly drifting away, as if it wanted to escape, but it would always be absorbed by the elixir again and reintegrate into it.

Repeating it like this, it was thrilling to see Gu Yu.

Gu Yu knew that when the external flames and internal anger of this pill calmed down, it should be the time for Dancheng, and tomorrow should be the time for Dancheng, and today was the sixth day, and she should also take that "Pure Yin Spirit Pill".

The pill was in his stomach, Gu Yu suddenly felt an illusion that the soldier was dying, what Zhang Xiaomad said was really good, this kind of pill will really weaken life, but since Zhang Xiaomad let her take such an elixir, she will definitely be fine.

In this state of death, Gu Yu waited for the arrival of the seventh day, waiting for the moment when Dancheng drew out the thunder and fire.

She must help Zhang Xiaofang to face the invasion of thunder and fire, and wait for Zhang Xiaomad's consciousness to wake up.

On the seventh day, Gu Yu, whose life was weakened, forcibly lifted his spirit by himself, waiting to complete his mission, he paid attention to the elixir between the mana of Zhang Xiaofang's hands, it was already perfect at the moment, the original manic flame on the outside had become a fire cloud, calmly flowing on the periphery of the elixir, and the original angry waves inside had also completely calmed down, and the two of them had obviously become a state of interdependence now.

Gu Yu smiled with relief, he knew that Zhang Xiaofang was about to succeed.

At this moment, a loud bang suddenly came from this cave, and then the entire cave shook as if the world was turned upside down.

Gu Yu knew that this was going to cause thunder and fire.

He mentioned the true element, hanging in the air, using his mana to stabilize his body, keeping an eye on the top of his head and feet, ready to resist the thunder and fire that was born.

Finally, he saw a flush on the surface of the ground, and then a ball of blue and red flames erupted, and Gu Yu's right hand immediately released mana, and a cold aura blocked the surging of earth fire.

As soon as she blocked the earth fire, a dazzling light suddenly appeared above the top of the cave, and a thunderbolt appeared out of thin air, which was actually a flash of heavenly thunder, Gu Yu did not hesitate, and released a mana left and right, facing the heavenly thunder, and also blocked the power of the heavenly thunder.

Zhang Xiaoyan was still sitting upright at the moment, his eyes were closed, his expression was calm, Gu Yu hoped that he would wake up soon, because she felt the power of the heavens and thunder fire, which was not the same as she imagined before, and the state she imagined before was too optimistic, and in fact, with her ability, even if she took the pill given by Zhang Xiaoyan in advance, I am afraid that it would not last long.

Although the heavens, thunder, earth and fire were blocked, the scorching energy released by the two was still eroding Gu Yu's body, and she also understood why Zhang Xiaofang wanted him to take a "Pure Yin Spirit Pill" in advance, as far as her current feelings were concerned, if she didn't have this pill, she would probably not be able to hold on to a stick of incense for a long time, and she would be killed by this scorching heat.

And even with the protection of that elixir, Gu Yu felt that he could only hold on to two incense sticks at most, he was not afraid of death, but he was afraid that he would die, and he could not protect Zhang Xiaofang, who had not woken up.

(End of chapter)