"What kind of Supreme Force is this?" Looking at the Stellar Qi on Ling Yun's finger, which seemed as though it could be dispersed by a gust of wind, Ling'er's expression became serious as he asked.

Even she could feel a dangerous aura coming from this strand of aura, and knew that this strand of aura was not simple.

Ling Yun smiled lightly and did not answer.

Other than him, only people from one of the Holy Lands could cultivate this Astral Energy. However, it wasn't as pure and powerful as his.

If Ling'er were to know of the name of the Astral Nova, she would definitely have some doubts.

With her identity, she might be able to find out who he was.

"Humph!" Seeing that Ling Yun did not answer, Ling'er wrinkled his nose and snorted. His body turned into a streak of light as he rushed into the Purple Bamboo Forest.

"What are you looking at!" Lingyun turned his head, and immediately saw Lin Xie and the rest's probing gazes, how could he not know that they were thinking wrongly?

Lin Xie and the rest shrank back.

Lingyun waved his hand, and a few white mirror-like objects appeared in the training field, like a smooth white wall.

However, they were not reflected in these mirrors. They were completely blank, and they emitted a gentle light, as sparkling and translucent as white jade.

"This is …" Lin Xie and the rest looked curiously at the mirror that suddenly appeared.

"This is Record Crystal Jade," seeing their confused look, Lingyun explained: "It can record the surrounding images and sounds, and it can also imprint martial skills, allowing the later generations to learn it."

At this point, Lingyun paused, and continued: "These crystal jade records have all kinds of basic images, after I activate the images, you guys will follow me and learn."

In fact, this was something only Lingyun could do. Although Record Crystal Jade was not very valuable, with many families having a few, it was definitely not a common product. It could be sold for at least 100 spirit stones each.

Other people's Record Crystal Jades had martial skills that were above Profound Rank.

In the end, he actually used a basic martial skill that wasn't even a low-grade yellow-rank one. It was simply a waste because a Record Crystal Jade could only brand three types of martial skills.

"I want all of you to train your respective basic martial skills to mastery within three days. If you fail, do it yourself." Ling Yun said indifferently.

The mastery of a martial skill was divided into five levels: Initiation, Small Success, Large Success, Perfection, and Soul Depth!

Returning to the true state meant that one's comprehension of a martial skill had reached a superb level, returning to the original state. The understanding of martial skills was no weaker than the senior who created this martial skill.

Even if it was just a low grade Yellow Rank martial skill, it would still be extremely difficult to cultivate it to the true realm.

However, as long as one comprehended it, the might displayed would not be any weaker than that of a high grade Yellow Rank martial skill. In fact, it might even be stronger.

"Alright, you guys can start your studies now. You have four hours. After four hours, each of you go chop another purple bamboo." The corner of Ling Yun's mouth curled up as he said.

With a flick of his wrist, a few spirit stones appeared in his palm. With a flick of his finger, the spirit stones flew toward the Record Crystal Jade.

After a series of ripples, the spirit stone seemed to have fused into the Record Crystal Jade.

With a buzz, several crystal jade records suddenly burst out with a shocking light.

The Record Crystal Jade originally looked like a world covered by clouds, but after the light faded, the clouds dissipated, revealing a new world.

In this world, there was a man standing proudly with his hands behind his back.

His eyes were clear and shone with a brilliant light. It was as if he could see through everything in the world with a single glance.

The corners of Lin Xie and the rest's mouths twitched, they were shocked to find that … This ethereal, ethereal person was Ling Yun in front of them.