After resting for two days, Lin Xuan gradually recovered.

This yin and yang technique is indeed a supernatural power against the sky, which is very different from other cultivation methods.

Other high-level secret techniques are extremely difficult to practice, and you don't want to achieve anything in a few years, or even decades.

However, this yin and yang formula only takes seven days, of course, provided that you can bear the inhuman pain.

Fortunately, after refining, if you do the transformation of yin and yang spiritual power, you won't feel any discomfort.

Lin Xuan sat cross-legged, using the technique of inward vision, observing the situation in his body.

In the dantian, a large amount of cyan spiritual power was gathered, running slowly, Lin Xuan took a breath and began to operate the yin and yang technique.

Something wonderful happened, the cyan color receded, and the spiritual power gradually turned into a strange color as black as ink.

This is Yin Spiritual Power!

Half an hour later, Lin Xuan stood up from the ground, but his expression was not too satisfied, although he had learned the Yin and Yang Technique, but the transformation between the two different spiritual powers was still too slow, and there would be no problem in normal times, but when fighting, it would obviously give the other party a chance to take advantage of, and he had to be able to send and receive it with heart.

But that's nothing. Skill comes from practice. Just practice. Mastery should be a matter of time.

And this time. There was also a happy event. Yue'er successfully built the foundation.

Just got the news. Lin Xuan was still a little incredulous. After all, when he built the base. There is the best marrow cleansing pill as an auxiliary. It took three months.

And Yue'er actually took less than ten days.

Although I have long known that the Yin Spirit Ghost Cultivation of the Dao Dao. Do more with less. But I didn't expect it to go so smoothly.

But facts are facts. When Yue'er came to ask him for peace with a smile on her face. Lin Xuan stayed for half an hour.

Lin Xuan envied Yue'er's talent, but he didn't know that the little yin spirit of the Dao Dao also admired him. Seeing that the master was actually able to transform a strange Yin spiritual power, the degree of purity was not much different from his own.

The exercises of the righteous path and the secret techniques of ghost cultivation are combined with lethality...... Well, that's exciting!

But now there is no time to rest, Yue'er will continue to retreat after Lin Xuan asks for peace, she has just stepped into the threshold of building a base, and it will take a period of hard cultivation to stabilize the realm.

Lin Xuan was naturally very happy. Xiao Yin Ling has a master-servant blood contract with herself, and the higher her cultivation, the more she will help herself.

Yue'er is working hard, of course, she can't be idle, and continue to cultivate the Yin and Yang Technique. Convert two different attributes of spiritual power into each other.

The process was not hard, it was just a little tedious, and compared to the situation of just cultivating this supernatural power, it was simply the difference between heaven and hell.

Two months later, although Lin Xuan's qualifications were not high, practice makes perfect, and after thousands of practices, he was now able to easily transform his yin and yang spiritual power.

Lin Xuan stood there awe-inspiring, the spiritual power fluctuations all over his body were calm, and it was obvious that the cultivation ground was the supreme divine skill of the Taoist lineage. And yet the next moment. His whole body flashed black, and in less than a fraction of a second, the temperament of the whole person completely changed, and the spiritual power he exuded became strange and cold.

Lin Xuan nodded, obviously quite satisfied with his achievements, not to mention the Yin and Yang Formula. At least it's ready to be used.

Of course, this secret method is just a bridge, and if you want to increase your strength in the future, you also need to cultivate various ghost and magic powers.

Lin Xuan took out another jade cylinder from his arms.

"Xuan Demon Sutra" he has already engraved in it, after all, paper fragments are not easy to preserve, if there is something missing over the years, wouldn't it be regrettable.

Sinking his divine consciousness into it, he naturally didn't look at the ghost cultivation method in front of him, Lin Xuan was only interested in various secret techniques.

Of course, there are trade-offs, and the exercises that can only be performed during the Ning Dan period or even after forming a Yuan Infant are naturally not greedy now.

I soon found an article related to foundation building.

There are more than a dozen secret techniques recorded. Then Lin Xuan began to pick again.

It's better to be amazingly powerful and easy to cultivate!

It sounds like a harsh condition. You can't have both, but that's the logic of the right path. The so-called demon sect's exercises, especially the art of ghost cultivation, are originally about taking tricks, rushing for quick success, and pursuing quick success and power.

Of course, there are many hidden dangers, but that has nothing to do with Lin Xuan, he is not a ghost cultivator, but based on the Nine Heavens Xuangong, relying on the Yin and Yang Technique to transform the Yin spiritual power.

After some selection, Lin Xuan took a fancy to two secret techniques.

One is related to spiritual weapons, which is about how to use the soul of a living person to refine the magic flag.

Under normal circumstances, although this method was powerful, Lin Xuan would definitely not be able to cultivate.

Although he is not a good person, he is not cruel by nature, he believes that people do not offend me, I do not offend others, and of course, if someone comes to provoke him, he will not show mercy.

Of course, he wouldn't do this kind of thing of extracting innocent people's souls to sacrifice spiritual weapons, but now, the situation is special, Lin Xuan already has a hundred soul banner in his hand!

That was the result of destroying the first demon cultivator in the Valley of Floating Clouds.

Now that I think about it, Ye Tian should also be a ghost cultivator.

Although he had obtained the Hundred Soul Banner for a long time, Lin Xuan rarely used it, and even if he took it out occasionally, it was for some auxiliary purposes.

It's not that the power of this treasure is not good, although Lin Xuan will not attack innocent people, but after destroying the enemy, he doesn't mind using this banner to absorb their souls, under the nourishment of a large number of monk spirits, the power of the hundred soul flags is actually far more than ordinary top-grade spiritual weapons.

It's just that Lin Xuan is a cultivator, so he can't use it, so it's difficult to exert his magical powers.

However, it is very clearly written in the Xuan Demon True Scripture that although the power of using Yin Spiritual Power to stimulate this treasure cannot be said to be infinite, it will definitely be able to gain the upper hand in the fighting method with ordinary foundation building period monks.

You must know that the Dao of Lu, the natal magic weapon of the Extreme Demon Venerable is the Ten Thousand Soul Banner, although I don't know how many levels it is higher than Lin Xuan's Hundred Soul Banner, but speaking of it, it is also something in the same vein.