The next day, Qin Ziang waited outside Yun Yueyao's door early, because he was too excited yesterday, and there was still a shadow under his eyes at this time.

Yun Yueyao didn't have much concern, but entered the hairpin space and talked to the two masters.

For example, Lingyun Zhiling's old thing, and for example, the matter of the Shadow Stone.

The Shadow Stone is not a natural ore, but a hand-carved multi-faceted round crystal, which is carved with complex formations, and its main function is to record images. The recorded images cannot be deleted or modified.

Yun Yueyao still noticed that the upper realm generally used a shadow stone, not a projection jade slip, because Qin Ziang took out this thing.

Moreover, the name of the Shadow Stone, it is difficult for her not to think about the third master.

As a result, just like this, it brought out a memory of the three masters.

The third master was silent, so this matter was explained by the Heavenly Absolute Daoist.

The Shadow Stone is indeed the masterpiece of the Third Master. The reason is that the three of them had some disputes in the division back then, and the intrigue within the sect is nothing more than the word right.

Lei Wanshan was straight-tempered and very arrogant at that time, and he intervened sideways and took the interests of many people.

At that time, someone designed them, and the three masters knew about it early and began to discuss countermeasures, they wanted to record the projection jade slip. However, the projection jade slip can be tampered with at will by virtue of its powerful divine sense. There is no real evidence.

The third master took a photo and pondered for three days at that time, refining this kind of recording crystal. As a result, it was named the Shadow Stone.

At that time, the urgent need was successfully relieved, and the Shadow Stone was also favored by the sect of the three masters, and from the hands of the three masters, the refining method was bought and began to be promoted.

The three masters are "cunning and cunning", where can they be sent away with a little spirit stone? Therefore, the sect of the three masters at that time was knocked hard.

The third master made a small profit, solved more than one crisis, and unexpectedly gained a lot of additional benefits.

Yun Yueyao never thought that such a small shadow stone is now a household name and has replaced the status of projection jade slips. At the time it was created, there was such a small episode.

Yun Yueyao became interested, so she took a photo with the third master to learn the refining method for a month. For more than half a year in the space, learning to refine the Shadow Stone was wasted for three months.

It only took three days to learn to refine, but it still took a month to really master it. For the next two months, Yun Yueyao was refining the Shadow Stone every day, in order to practice makes perfect.

And the Lingering Stone is not only a crystal that can be refined, as long as it is a stone that contains aura.

For example, the spirit stone.

There is no material such as crystal in the hairpin space, but there is diamond. But the shadow stone refined by diamond is not satisfactory.

Lingyu is naturally available, but the cost is too high, so she chose the cheapest, low-grade spirit stone.

The aura of the lower grade spirit stone is stable, and it is cheaper than the cost of crystal.

And the number of lower-grade spirit stones in Yun Yueyao's hands was enough for her to practice at will.

In two months, Yun Yueyao increased from the number of one per day to the level that she could refine one with a single hand. Only then did he stop and began to study the Qingling Pill again.

The Heavenly Absolute Dao people also have a strong interest in the Qingling Pill, and the main pill is that it should be improved from the Dust Reduction Pill of their time. The effect of the Qingling Pill is no different from the Dust Reduction Pill, but the refining cost of the Dust Reduction Pill is too high, and the cost of a lower grade is more than 50,000 lower grade spirit stones.

But even if the Dust Reduction Pill is only a lower grade, it already has the medicinal value of the top grade of the Qingling Pill.

Therefore, it is expensive for a reason.