call!

When he thought of it, Lin Yun immediately sat cross-legged on the ground and flipped his hands to send the remaining gray crystals into his mouth.

"Boom! Boom! Boom!"

The moment the gray crystal was sent into his mouth, a stream of powerful spiritual energy immediately exploded in Lin Yun's mouth and rushed into Lin Yun's mind space. Lin Yun's mental power immediately increased rapidly like a fire and saw the wind. At the same time, Lin Yun's mind was clear.

"The level of this spiritual energy is so high, it is estimated that it can enhance the mental power of the second level practitioner in the super realm..."

Lin Yun said in secretly.

Previously, because he had not given much gray crystals, although the spiritual energy he had born was huge and the level was not low, it was far inferior to the mental power of a second-level practitioner in the super realm, and it was soon diluted in his mind space. Therefore, he only judged that the level of this spiritual energy was not low and was absolutely harmless to him, and did not judge the specific level of this spiritual energy.

Now, he judged it.

The heavenly treasure that can increase the mental power of a super strong person... or the heavenly treasure that can increase the mental power of a super realm second level practitioner...

The value of this level of heavenly and earth treasure is incalculable, and it is far more than the value of the heavenly and earthly minds he purchased before.

Perhaps, only the super golden source liquid given to him by Xiao Jin's mother can be compared with this gray crystal.

"Is it possible that this gray crystal is the reason why a ghost cultivator at the second level of the super realm left behind?" Lin Yun said thoughtfully.

Thinking of this, Lin Yun couldn't help but feel a little excited. Doesn't this mean that if he meets other ghost cultivators later, he may also obtain such a gray crystal if he kills the other party.

Moreover, the stronger the opponent's strength, the higher the gray crystal level he gets?

What he originally judged was that he might encounter the third level of ghost cultivator in the super realm...

The more I think about it, the more excited I become.

But soon, Lin Yun put this idea aside.

Is this the case? When he meets other ghost cultivators later and kills those ghost cultivators, he can be sure that the most important thing he has done now is to digest this gray crystal well.

"Huh! Huh! Huh!"

Lin Yun closed his eyes and began to quickly refine the gray crystal.

He found that the spiritual energy emitted by this gray crystal was very easy to refine, far exceeding the refining speed of the divine heart of heaven and earth. It was also because of this that he decided to refine this gray crystal on the spot.

Otherwise, he would have spent most of his time on the Heavenly Dao Tower for only half a year.

He was very curious about the higher space of the Heavenly Dao Tower, how could he waste it here like this?

One day...two days...three days...

Although the spiritual energy in this gray crystal was refining very quickly, the spiritual energy contained in it was too huge. It took Lin Yun a full three days to refine all the spiritual energy in it.

"Buzz--"

Just as Lin Yun had refined all his spiritual energy, Lin Yun's mind suddenly shook, and a magical fluctuation emanated from his mental power, and his mental power began to transform rapidly.

But at this moment, his mental power broke through from the late stage of level 12 to the peak level 12.

Yes, Lin Yun's original mental power was only at the late stage of the twelve level. Although he had already obtained a very high-level divine heart from Donghuang, which was enough for him to improve his mental power to the peak level of the twelve level, it took quite a while to refine the divine heart of the heaven and earth.

He never had time to refine the divine hearts of heaven and earth in large quantities.

His mental power is only at the level of not weak at the late stage of the twelve level.

This time, it took only three days to improve the mental power to the peak of level 12, which is indeed not comparable to the spiritual mind of refining the heaven and earth.

"Those gods of heaven and earth can only improve the spiritual energy at the peak level of the twelve level. If I guessed this gray crystal correctly, it should be able to improve the mental power of the second-level strongman in the super realm... I had known it before, I would have used those gods of heaven and earth first and then the gray crystal. Now, if I use those gods of heaven and earth again, the effect will be greatly reduced, and it will be difficult for me to hit the super realm level..."

After half a day, Lin Yun stabilized his mental power level, opened his eyes and sighed slightly.

He couldn't help but feel a little regretful. He first used low-level treasures and then used high-level treasures. This was the normal routine... Now, it was a pity.

"However, if you use the God of Heaven and Earth, I don't know how long it will take to refine it. I'm afraid I can't refine it in this Heavenly Dao Tower, and I will not be able to increase my strength in time..." After a pause, Lin Yun thought.

Thinking of this, Lin Yun's regrets were reduced a lot.

Now that he is entering the Heavenly Dao Tower, the stronger the better. Especially, when he is entering the level now, he is likely to encounter many ghost cultivators who are good at mental attacks, so naturally the higher the mental power level, the better.

As for those gods and minds in the world... they won't use them if they are not easy to use. It's also good to wait for him to go out and let Mengmeng, Qingqing and others use them. It just so happens that they either have a lower mental level or a lower overall strength. If they use this gray crystal, they may not be able to withstand it. The gods and minds in the world with gentle temperament and slow refining are just right for them.

"Three and a half days..."

After figuring it out, Lin Yun looked up and his black pupils shrank slightly.

It took him a total of three and a half days to refine the gray crystal. Depending on the situation, he could not do too much such things.

Otherwise, the time he spends a lot less in his journey to the Heavenly Dao Tower.

call!

Lin Yun had a thought and began to continue walking forward.

And look at the scene of this space.

I saw that this was a continuous mountain range, very tall and majestic, but there was a yin energy everywhere. Lin Yun estimated that this should be a yin-attribute mountain range, which is the legendary good place for ghost cultivators to survive.

"I can actually survive in the second level of the super realm. I really don't know how this environment was born? Or maybe it was just simulated by the Heavenly Dao Tower?" Lin Yun said secretly.

After a total of forty-nine layers of the Heavenly Dao Tower, Lin Yun now has vague speculations about the various scenes simulated by the Heavenly Dao Tower. He estimated that even if these scenes are not real, they must be very reasonable.

Not long after, Lin Yun met a powerful ghost cultivator again, whose strength was stronger than the one just now, but still in the second level of the super realm. Moreover, this ghost cultivator seemed to be more cunning, and he would use some sneak attacks and tricks.

"puff!"

In the end, Lin Yun took a lot of effort to kill the ghost cultivator.

"It's really not easy..." Lin Yun couldn't help but sigh at the moment of killing.

At the same time, his mental power immediately covered the place where the ghost cultivator fell, looking for the gray crystal...

"really!"

Soon, Lin Yun's eyes lit up and he was happy.

Sure enough, he found a gray crystal at the place where the ghost cultivator fell, about the same size as the last time he found it.

Lin Yun's thought moved, and the person had already flashed to the gray crystal, and the next moment he grabbed the gray crystal in his hand.

"Exactly the same!" Lin Yun smiled slightly.

"Let's refine this gray crystal first! The second ghost cultivator is not easy for me to deal with. It is still in the second level of the super realm. If I encounter a ghost cultivator at the third level of the super realm, or encounter two at a time, it will definitely be even more difficult to deal with..."

"The increase in mental power level makes it easier for me to deal with the mental attacks of these ghost cultivators, and my reaction speed is also faster. As the saying goes, sharpening a knife will not delay chopping wood. I spend more time now, but in total, it may not necessarily waste much time..."

Lin Yun thought for a moment and said secretly.

"call!"

Lin Yun sat cross-legged on the ground and refined the gray crystal again.

His mental power quantity and quality have once again entered a surge.

"Buzz—Buzz—Buzz—Buzz”

Just as Lin Yun refined this gray crystal, the blood-devouring sword placed on Lin Yun's knee emitted a blood-red light that was flashing and trembling violently, making a sound.

Lin Yun ignored it. When he refined the gray crystal before, the Blood-Swallowing Sword reacted like this.

He believed that this was the natural reaction of the Blood-Devouring Sword when his power changed greatly.

After all, the power of the Blood-Devouring Sword is now fusing with his power, and his mental power has skyrocketed, and it is normal for the Blood-Devouring Sword to react.

"Boom-hu-hu-hu-hu-hu-hu-hu-hu-hu-hu-"

However, this time, before Lin Yun could refine much spiritual energy, the blood-colored light emitted from the Blood-Devouring Sword suddenly surged, and a powerful force suddenly poured into Lin Yun's body from the Blood-Devouring Sword, quickly rolled up a huge amount of spiritual energy back into the Blood-Devouring Sword. Then, the blood-colored light released by the Blood-Devouring Sword became even stronger.

"What?"

Lin Yun was shocked and quickly opened his eyes and looked at the Blood-Swallowing Sword on his knee in surprise.

He has always been killing people. The Blood-Devouring Sword absorbs the opponent's essence and blood power. Then, part of the essence and blood power is absorbed by the Blood-Devouring Sword itself, enhancing itself, and part of it is fed back to Lin Yun to enhance Lin Yun's power.

It has never happened that he would be absorbed by the Blood-Devouring Sword by using the power he used to increase his power by the treasures of heaven and earth.

"boom!"

Lin Yun stood up and immediately took the Blood-Devouring Sword from his knees. A force enveloped the Blood-Devouring Sword, allowing the Blood-Devouring Sword to hang in front of him and peel off his power.

"Little Blood! You actually dare to absorb Brother Lin Yun's power!"

"Little Blood, how can you do this?"

At the same time, the angry voices of Xiaobai and Xiaolan came from the Blood-Devouring Sword. Then, three light balls chased each other and attacked each other, but started fighting.

"Xiaobai, Xiaolan, what's going on?"

Lin Yun asked in a deep voice.

The Blood-Devouring Sword is undoubtedly a very despicable magic weapon. It is not a good phenomenon to lose control now, especially when Xiaobai and Xiaolan are also supervising within the Blood-Devouring Sword.

Lin Yun did not think that Xiaobai and Xiaolan had become the same gang as the spirits inside the blood-devouring sword.

"Brother, this little blood suddenly broke away from the relationship with me and Xiaolan, and absorbed your power..."

"Brother, it's all our fault that we didn't look down on it. Don't worry, we will look forward to it next and will not let it do whatever it wants..."

Xiaobai and Xiaolan said quickly, their tone very angry.
To be continued...