Luo Yin and Lin Xu'er left Huangquan and flew in the direction of Xudu City.

Because Lin Xu'er was already a Jindan Grandmaster, and her flight speed was far higher than Luo Yin's Cangwu boat, so it didn't take long for Lin Xu'er to fly with Luo Yin, so the speed of the two increased greatly, and they soon stayed away from Huangquan.

It took nearly two months for the two of them to finally return to the city, just as the door of life and death was closing, and it was still nearly two years before it opened again.

There was no way, so the two could only temporarily stay in Xudu City, waiting for the door of life and death to open again.

And Luo Yin is now over two hundred years old, and there are only about ninety years left before the Divine Soul Cultivator's three-hundred-hundred-year-old limit, so he doesn't dare to waste any more time.

Therefore, he decided not to wait to return to the living world, and directly opened the furnace alchemy in this capital city, striving to refine the exclusive pill Dragon Tiger Mixed Yuan Pill that assisted the Ning Pill as soon as possible.

After making up their minds, the two immediately found a house to live in this ghost city in the city.

He had already bought or exchanged the other materials for refining the Dragon and Tiger Mixed Yuan Pill in the Sea of Stars, and the five demon beasts that reconciled the five elements of yin and yang were also collected in the battle with the demon clan, and before coming to the South Underworld, he only lacked a taste of Huangquan Grass.

Now that the Huangquan grass has arrived, it is ready to open the furnace for alchemy and make the final preparations for condensing the golden pill.

Lin Xu'er was protecting the Dharma outside the room, while Luo Yin was living in the room, with a Dan furnace, gold, wood, water, fire, and earth, five superb demon beasts, inner pills, Huangquan grass, and other alchemy materials placed in front of him.

Then he cut those spirit grasses into small pieces and carefully packed them separately, and then carefully ground those demon beasts into fine powders and placed them separately.

After making the preparations, he closed his eyes and began to rehearse the entire process of alchemy in his mind, over and over again.

These alchemy materials are extremely hard-won, and at the same time, they are basically only enough for him to refine once, if the refining fails, he doesn't know how many years it will take him to collect these materials again.

Therefore, he must ensure that every step of alchemy is well understood, so as not to have an accident that will lead to refining failure.

After rehearsing this in his mind more than a dozen times, when he confirmed that all the steps were fine, he finally opened his eyes, slowly came to the Dan furnace, put some of the materials into the Dan furnace, and began to preheat the Dan furnace with the real fire in his hand.

As the temperature of the Dan Furnace increased, his divine thoughts enveloped the entire Dan Furnace, always paying attention to the changes in the materials inside the Dan Furnace.

Alchemy is about a kind of heat, if the heat is not enough, then the final refining will only be defective or even waste, so there is no need to be careless.

As the real fire continued to burn, the materials in the Dan furnace gradually melted and turned into a stream of juice.

He immediately opened the lid of the Dan Furnace through a gap, and with a wave of his hand, the powder of the five Demon Beast Inner Dan placed in the ground flew into the Dan Furnace on its own, and then immediately closed the Dan Furnace.

After adding new ingredients, the real fire in his hand suddenly became vigorous, and the entire Dan furnace was baked red.

I don't know how much time has passed, the various materials in the Dan furnace have undergone corresponding changes under the high temperature, and the pills have begun to slowly take shape, gradually condensing into round pills.

Seeing that the pill had been formed, Luo Yin understood that the most critical time had finally arrived, he needed to put in the Huangquan Grass and add the initial power to his Dragon and Tiger Mixed Yuan Pill with the power of his Extreme Yin, so that the internal Five Elements Symbiosis System would start to work.

If he couldn't make the pill complete the five elements of regeneration, then this refining would be declared a failure, and all the precious materials that he had collected over the years would be invalid.

Under such circumstances, he carefully put the yellow spring grass into it, and kept an eye on its changes with his divine thoughts, so as to determine the strength of the fire.

At the moment when the Yellow Spring Grass was put in, the Yellow Spring Grass, an extremely yin thing, instantly gave birth to a trace of the power of the Yang.

The cathode is born of yang, the anode is born of yin, and the power of yin and yang instantly turns into a terrifying force under the mutual annihilation of each other.

Luo Yin only felt that his divine thoughts were suddenly expelled from the Dan Furnace under this terrifying force, so that he could no longer see the changes in the Dan Furnace.

At the same time, the entire Dan Furnace suddenly emitted a slight clattering sound, as if the Dan Furnace could not withstand the force and would burst open at any time.

He couldn't help but pinch in his heart, and secretly prayed that he would succeed in refining.

And the terrifying power in the Dan furnace came and went quickly, but in the blink of an eye, it disappeared, and Luo Yin's divine thoughts invaded the Dan furnace again, and he saw the changes in the pill in the Dan furnace.

A round pill was lying calmly at the bottom of the furnace, and its body was shining brightly, sometimes cyan, sometimes blue, sometimes yellow, sometimes red, sometimes golden, then black and yellow.

Seeing the brilliance above the elixir, Luo Yin's heart suddenly relaxed.

"Finally the refining has been successful!"

It's just that he didn't take out the pill immediately at this time, but continued to bake it over a low fire, warming the pill in the pill furnace.

After several more hours, he finally opened the Dan furnace, and with a move of his hand, a ray of light flew out of it and fell into a medicine bottle that Luo Yin had already prepared.

After collecting the pill, he immediately closed the lid of the pill bottle to prevent the pill from losing its medicinal power.

After doing this, he finally had time to take a good look at the elixir he had refined.

There is only one pill that comes out of the oven, and the five elements of yin and yang on this pill are changing, which makes people know at a glance that it is not ordinary.

This is the Dragon and Tiger Mixed Yuan Pill, an exclusive pill developed by Luo Yin for decades, which can help him hit the bottleneck of the Golden Pill and increase the chance of condensing the Golden Pill.

"It's a pity that Cheng Dan only has one, if only there were a few more. Luo Yin couldn't help but say with some regret in his heart, but then he thought about it, "It's not bad to be able to become one, it's better than refining failure." ”

At this point, all the preparations for Luo Yin's impact on the Jindan difficulty have been completed, and all that remains is to find an opportunity to comprehend the world, in order to condense the Jindan at the intersection of dragons and tigers.

After putting away the pills, Luo Yin opened the door and walked out.

Lin Su'er was guarding the door at this time, and when she saw that Luo Yin finally came out, she hurriedly asked, "How is the son, can the refining be successful?"

Luo Yin nodded and smiled: "Fortunately, this time I was lucky, and I succeeded in refining it once." ”

Lin Su'er couldn't help but breathe a sigh of relief when she heard this, and said with a smile: "Congratulations to Gongzi for taking another step closer to Ning Dan." ”

Luo Yin said: "Now everything is ready, only the east wind is owed, as long as I find the opportunity to perceive the heaven and the earth, I can communicate with the heaven and the earth to attract the power of the heaven and the earth into the body, and then the dragon and the tiger meet to try to condense the golden pill." It's just that I don't know when I will find that opportunity. ”

Lin Xi'er said with a smile: "If you can't say this kind of thing by chance, maybe it will be tomorrow." ”

Luo Yin said: "That's true, I just hope that day will come soon." ”