In the cultivation realm, the elixir is divided into four grades, lower grade, middle grade, upper grade, and best grade.

Taking the marrow cleansing pill as an example, the lower grade is the most common, and the refining of the middle grade is extremely difficult, but all the famous sects, the demon road giants, relying on their rich net worth and experienced alchemists, can always make so many furnaces.

As for the high-grade Dan, it is extremely rare, but the various sects have been passed down from generation to generation, and there is always a point, which is said to be "accidentally" refined under the condition of excellent luck.

The last is the best pill.

To tell the truth, basically no one has seen it, only the legends that exist in the old and old, it is said that there should have been in ancient times, and the ancient monks had great magical powers, as for the present...... There are also sects that do not believe in evil, and they spend a lot of manpower and are powerless in the hope of what happens, but they still don't refine anything.

In other words, the best pill only exists as described in the book.

However, this elixir has now become Lin Xuan's only hope, perhaps only this legendary elixir that can defy the heavens can make himself, an ordinary person without a spiritual root, build a foundation successfully.

As soon as he thought of it, Lin Xuan began to purify the best marrow washing pill!

However, unlike the situation he had encountered before, you must know that after entering the Great Perfection realm, even if it is a high-grade pill, Lin Xuan can successfully purify it, but the probability is relatively low, ten pills, can only succeed once.

But this superb Dan ......

If it only failed dozens of times, it was still within Lin Xuan's tolerance range, after all, how could the legendary elixir be so easy to purify.

But when he spent more than ten days and tried nearly a thousand pills, he didn't even purify a single pill......

"Alas!"

Lin Xuan sighed, looking at another scrapped pill in his hand, frowning, even if his perseverance was amazing, his patience was almost at the limit at this time.

Purifying a thousand pills, but not succeeding once, according to Lin Xuan's speculation, this is probably not a problem where the probability of success is too small, but that there is no way to obtain the best pill through the method of purification.

But if you don't have the best pill, you won't be able to build a foundation at all.

Could it be that after working hard for so long, he can still only wander in the spirit period, even if he has obtained the ability to purify, without the spiritual root, he still can't go far on the path of immortality?

Lin Xuan was a little frustrated, but soon, he put this low mood behind him, there is no bridge in the world that cannot be crossed, and he has survived so many thorns at the beginning, this difficulty is nothing.

Could it be that the best pill was different from the other three grades of pills, a thought appeared in Lin Xuan's mind.

So then he started to check the information again, but for the current cultivators, the best marrow cleansing pill is too ethereal, not to mention that there is no need for that kind of anti-heaven pill in reality.

As long as the spiritual root is okay and the effort is enough, having a high-grade pill is enough to build a successful foundation, like those elite disciples, with their qualifications, even if they are medium-grade pills, or even low-grade ones still build foundations.

I'm afraid that the only people who need the best pill are ordinary people like Lin Xuan who have no spiritual roots.

In addition, this elixir has not appeared for thousands of years, except for some ancient jade cylinders, other books will not mention it at all.

Lin Xuan went to check a lot of information, but still found nothing.

He had also thought about asking the elders in the door for advice, but he could only enter the Elite Hall by looking like Ye Tian, but if he was really Ye Tian, he wouldn't need any top-grade pills at all with that kind of spiritual root qualification.

Isn't it self-defeating to ask for advice by yourself and attract the attention of others?

Left or right, Lin Xuan was so depressed that he almost vomited blood.

In desperation, he had no choice but to continue to take Shangpin Dan to practice, to see if he could suddenly bless his soul and break through the bottleneck one day.

From time to time, he used the Heavenly Demon Imitation Technique to make up Ye Tian, and turned around in the door, circling between the elders to see if he could knock on the side, and inquire about the purpose of the best pill without attracting attention.

Lin Xuan's ability to talk is still very powerful, and he finally tricked some elders into confiding the truth, but the result made him vomit blood even more, and those monks in the foundation building period actually didn't know about the best marrow cleansing pill.

It is said that the records about this thing are only available to some of the real famous sects in the cultivation realm, which immediately dispelled Lin Xuan's thoughts, although his current strength is second to none among the low-level disciples, but those real great sects ...... You must know that Yanzhou is located on the border, and the level of cultivation here is relatively backward, and the strength of Piaoyun Valley is only a third-rate in terms of the entire cultivation realm.

Even the elders didn't know what to do, Lin Xuan really felt a little dead, he had thought about retreating now, working hard for twenty or thirty years, constantly taking the top grade pill, and constantly cultivating, although it was bitter, it was nothing, but whether it would be able to build a foundation in that way, Lin Xuan still had no bottom in his heart.

Unlike cultivators with high realms, the longevity of a cultivator in the Spirit Movement Period was similar to that of ordinary mortals, Lin Xuan really didn't have that much time to gamble, not to mention that as he got older, his hope of building a foundation would become more and more slim.

What to do?

Lin Xuan never gave up hope, but he was really distressed.

However, these days, although he has not broken through the bottleneck and successfully built a foundation, he has worked hard to cultivate every day, and the foundation has become more solid, and with the assistance of taking ginseng, the spiritual power in his body has become more and more refined.

But said that on this day, Lin Xuan pretended to be Ye Tian, ready to listen to the elder's preaching, and on the way there, he met Ma Tianxiong again, for this senior brother, after meeting a few times, Lin Xuan had a good impression, he was warm-hearted, and the two chatted casually.

Originally, Lin Xuan didn't deliberately inquire, but he didn't know how Lu Dao was chatting, so he pulled the topic to the best pill.

Of course, that kind of thing is completely different from other grades of pills, and the ingredients are all slightly different. ”

"Senior Brother Zhilu Dao?"

Lin Xuan was stunned for a moment, and then he was ecstatic, he really had nowhere to find the iron shoes, and it took no effort to get it, how could he not have imagined that he had been running around for several days and found nothing, and even the elders in the sect did not know the secret of the best pill, and the senior brother in front of him was actually clear.