In the mountains and forests, there was silence. The white water fell straight from the top of the cliff and fell into the deep pool, and immediately splashed with bursts of white water! And beside the deep pool, in the cave, there was a dead silence, and there was no movement!

The cave chosen by Qin Duan was extremely remote, except for some wild beasts coming and going, there was not half a figure passing by at all! And in the blink of an eye, seven days passed like this!

"Collapse!"

Suddenly, a booming sound came from the cave! In an instant, the entire mountain forest seemed to tremble violently! Countless rolling stones rolled down from the mountain and fell to the ground with a clatter! Countless dust was smashed in an instant!

The rumbling sound echoed for thousands of miles, and it lasted for a long time! And the cave where Qin Dui was originally located also cracked open in an instant, and countless earth and rocks collapsed!

Fortunately, this cave is open enough and tough enough that it did not completely collapse after withstanding the huge explosion just now!

Looking inside from the entrance of the cave, I saw that a high layer of earth and stones had been piled up in the cave, and in the innermost corner of the cave, it had been completely buried by the collapsed stones!

"It took a full seventy-seven and forty-nine days to refine this Yin Yang Nine Rank Spirit Pill, and in this refining process, there will be seven powerful blasts! The energy burst out by each blast is extremely terrifying! Just now it was just the first blast, and half of the entire cave collapsed, and the next six blasts may be even more dangerous!"

In the middle of the pile of earth and rock, there was a soft murmur. If you look closely, you will find that there is a vague shadow in the high pile of earth and stones! This shadow is Qin Dusk's Qiankun Ding!

And in this Qiankun Ding, Qin Duan was working hard to refine the elixir!

After seven days and seven nights of refining, these two Yuan Embryo Cave Mansions with very different attributes finally ushered in the first real fusion!

In the midst of the silver light cluster and the crimson blood-colored light cluster, a thumb-sized white light cluster was also generated! And this white light cluster was the prototype of the Yin Yang Nine Rank Spirit Pill!

The whole body of Qiankun Ding has been buried by earth and stones, and in Qiankun Ding, Qin Dui's vitality is still highly running, acting on the two Yuan Embryo Cave Mansions, so that these two Yuan Embryo Cave Mansions can be fused again!

Brilliant brilliance shot out from the Qiankun Ding, and the majestic vitality was extremely sharp and domineering, and after roaring out, it landed on the cave wall, and immediately a large piece of the cave wall collapsed instantly!

"Every fusion will bring a huge impact to my physical body, although I have already prepared a large number of pills to repair the seriously injured body, but I never expected that the process of this fusion would be so difficult! However, no matter how dangerous and difficult it is, I have to grit my teeth and persevere!"

Qin Duan's face was slightly hideous, and he suddenly shouted in his heart. At this time, from within Qin Dui's body, from the various muscles, bones and muscles of his body, a large amount of pills immediately poured out, flowing up and down Qin Dui's body!

The clock is still ticking!

One day!

Two days!

Three days!

Soon, another seven days passed!

And this time, the Pure Yin Yuan Embryo Cave Mansion and the Pure Yang Yuan Embryo Cave Mansion once again carried out a substantial fusion! A louder blasting sound also came immediately after! This time the blasting, the countless sharp vitality that burst out in an instant, extremely powerful and terrifying, made Qin Duan's entire body be directly blasted back!

"What a powerful power!"

Qin Dui's entire body was blasted back by the huge vitality and hit the cave wall, and Qin Dui spat out a mouthful of blood, and suddenly sighed secretly in his heart. In front of Qin Duan, countless vitality edges shrouded in that Qiankun Ding!

"I'm not going to give up!"

Qin Duan took out two pills and put them in his mouth, and then immediately drilled into the Qiankun Ding! After entering the Qiankun Ding, Qin Duan seemed to have come to a sea of vitality, above the sea of pure yang fire, the intertwined vitality was even more brilliant!

If the great Qiankun Ding, almost all of them are wrapped in those substantial waves of vitality and qi, layer after layer, impenetrable, with endless coercion! The farther you go to the middle, the more powerful the waves of vitality become!

Qin Duan stepped forward step by step, and slowly came to the side of the two fused primordial embryo air masses! After the second blasting, this Pure Yin Yuan Embryo Cave Mansion and the Pure Yang Yuan Embryo Cave Mansion had already had a greater fusion! At this time, they were already tightly connected together!

And between the silver light cluster and the red light cluster, the white Yin Yang Nine Rank Spirit Pill was also twice as large as before!

The milky white light cluster looks particularly peaceful and serene in the agitated vitality! The energy is extremely weird, giving people an extremely warm feeling, as if it is like a spring breeze!

Qin Duan couldn't help but be shocked, and the vitality of his whole body rose again, and he began to fuse the two primordial embryos again!

······

In the blink of an eye, half a month had passed! In this half a month's time, the Yin Yang Nine Rank Spirit Pill had undergone two more fusion blasts! And in those two primordial embryos, the milky white light cluster had also grown nearly four times more than before!

In the middle of the Qiankun Ding, in the midst of countless agitated essence vitality, Qin Duan sat quietly! his delicate face looked a little hideous, and at this time, there were still a few red blood stains coming out of the corners of his mouth!

Whether it was the Taixu Ancient Dragon or Qin Duan himself, they all far underestimated the power of this Heavenly Emperor Yuan Embryo!

Originally, I thought that with Qin Duan's strong body and the assistance of various mysterious elixirs, he should be able to refine this nine-grade Yin Yang Elixir, but he never expected that after only four fusion blasts, Qin Dui's physical body had already reached a limit!

At this time, almost all the muscles, bones and muscles of Qin Dui's body were seriously injured by the substantial vitality, and bone-eroding pain poured up from all places, making Qin Dui sweat coldly!

"The power of this Heavenly Emperor Yuan Embryo is too strong! Even if I have a superb Dan furnace like Qiankun Ding, I am not 100% sure! However, no matter what, I will not give up until the last moment! There are only three explosions left, just grit your teeth and get through!"

Qin Duan suddenly cheered himself up in his heart. Immediately, the whole person struggled to stand up, wanting to squeeze and fuse the two Yuan embryos again!However, at this time, there were bursts of stinging pain all over his body, which made Qin Duan dizzy for a while!

After nearly a month of alchemy, Qin Duan's vitality had been exhausted, and at this time, his entire body was plunged into unprecedented exhaustion, and he didn't even have the strength to stand up!

"Qin Duan, something is wrong, someone has broken into this mountain forest!"

Just as Qin Duan was struggling to continue fusing the two primordial embryos, the voice of the bone dragon suddenly came from his mind.

"What?"

When Qin Duan heard this, he couldn't help but change his expression!

At the beginning, he came out of the Tianmiao Sect because the process of alchemy was too noisy, but he didn't expect to find such a secluded place and be discovered.

The process of refining the Yin and Yang Nine Rank Spirit Pill was extremely dangerous, and at this time, Qin Duan's whole person was also in an extremely weak state because of the four explosions, and it was impossible for him to have the strength to deal with any enemy!

Qin Duan couldn't help but frown tightly!

"At this moment, we can only stop alchemy temporarily! Qin Duan, you can recover your strength with peace of mind first, and I will wrap these two primordial embryos, and then hide your breath! Maybe those three masters outside are not coming for us, and they may not be!"

After the bone dragon finished saying this, a majestic vitality immediately surged from the Qiankun Ding, tightly enveloping the brilliant and domineering Yuan Embryo Qi Mass! In an instant, in the entire Qiankun Ding and the cave, all the sharp Yuan Qi suddenly disappeared into nothing!

Qin Duan had just experienced the power of this primordial embryo, and at this time, the bone dragon actually wrapped these two Heavenly Emperor primordial embryos with his own strength, completely hiding their breath, which shows how strong the bone dragon is!

However, at this time, Qin Duan could also sense it! forcibly stopping the alchemy, wrapping those domineering vitality qi almost consumed all of the bone dragon's vitality, and moreover, the bone dragon's entire body at this time also seemed to be trembling slightly! It seemed that it had reached a certain limit!

"Damn!"

Qin Dui was weak and powerless at this time, and he couldn't lift up the slightest bit of vitality, and after knowing that someone was approaching, he could only quietly hide in the Qiankun Ding, unable to move!

Now the situation of Qin Duan and the bone dragon can be said to be very dangerous, although the two groups of Heavenly Emperor Yuan Embryos were forcibly wrapped by the bone dragon, but the Yuan Embryo of the Heavenly Emperor strong man is so powerful and domineering, although the bone dragon predecessors are strong, but at this time, they can only deal with those two groups of Yuan embryos, and they can't divide any strength to help Qin Dui!

And Qin Duan, the situation is even worse at this time!

Dealing with four blasts had already consumed all of his vitality, and at this time, even an ordinary mortal could easily injure Qin Dui!

"I hope they're not here for me!"

Qin Duan suddenly couldn't help but sigh in his heart. Then he took out a pill, stuffed it into his mouth, then swallowed it, and began to quietly breathe and cultivate!

Outside the cave, three streamers suddenly fell, looked outside the cave for a while, and then walked into the cave!