Bai Yuqing looked at his achievements, and couldn't help but feel a sense of pride in his heart, and wiped the sweat on his forehead with satisfaction.

Immediately, he looked puzzled, thinking about the ghost qi, since the ghost qi can refine the ghost slave, and when he runs the Heavenly Demon Transformation, he also gives birth to a black gas, and the essence of black gas and ghost qi is the same - both are a kind of gas.

Qi is divided into two types, the sinking yin qi and the floating yang qi, and the human body is composed of these two qis. Bai Yuqing carefully found that when he was running the magic skills, his body was also filled with black qi, and this black qi gave Bai Yuqing a feeling that was different from ghost qi.

He had a bold idea in his heart, the ghost qi could refine the ghost slave, so the black qi that was permeated by his own magic power should also be able to refine the ghost slave.

A great man once said: Practice is the only sign of testing theory.

Bai Yuqing ran the Heavenly Demon Transformation, and his body was filled with black qi, and his black qi was far better than the ghost qi in the room, and when the black qi encountered the ghost qi, it was like a hungry wolf pounced on it, wanting to devour it all.

Bai Yuqing took out the ghost raising jar obtained by killing the disciples of the Imperial Ghost Sect, took out a ghost slave, and looked at it coldly. Controlling the black qi around his body, he slowly injected it into this ghost slave, and as soon as this ghost slave came into contact with the black qi, he had a painful expression, and the next breath exploded, rising a burst of black mist.

Bai Yuqing's eyebrows furrowed, and then he took out another one and tried again to explode, trying more than a hundred times in a row, but the result was still unsuccessful, and it exploded in the next second when the ghost slave came into contact with the black qi, and more than a hundred ghost slaves were without exception.

Bai Yuqing muttered in her heart: Could it be that the refined ghost slave can't contain other black qi?

The ghost slave accommodates the ghost qi, just like the monk absorbs the free aura around him, and there is a degree, which depends on the monk's cultivation, physique, etc.

The cultivator's cultivation is like a pool and a bucket, the amount of water that the pool holds is far better than the bucket, the higher the cultivation, the more water it can hold, and the same is true for ghost slaves, the stronger the cultivation before death, the more ghost qi it can contain, and the more ghost qi it contains, the greater the potential of ghost slaves.

Bai Yuqing once again pulled out a ghost slave, used his mana, forcibly deprived the ghost qi in the ghost slave's body, vacated the position of the black qi, and after a while, manipulated the black qi into the ghost slave's body.

Black qi and ghost qi rampage in the ghost slave's body, like a dragon fighting, the ghost slave slowly quieted down after a painful wail, Bai Yuqing's pupils contracted, and a trace of joy was born in his heart, whenever he began to be happy, the mutation came, and with a bang, this ghost slave exploded.

Bai Yuqing was stubborn by nature, he didn't believe that he couldn't do it, and continued to try, but the result was still the same, his eyebrows were furrowed, and he slandered in his heart: Doesn't this method work?

He carefully recalled the Dafa of Raising Ghosts, analyzed the principle, and found that refining ghost slaves is actually the same as mortal cultivation, mortals first condense true qi in their bodies, then absorb the surrounding spiritual energy, strengthen true qi, and finally transform from true qi to mana, refining ghost slaves is also to first inject ghost qi into the dry corpse, let the ghost slave adapt to the ghost qi, and then draw a spell to absorb the ghost qi by itself, so that the ghost slave can absorb the ghost qi by himself.

Since the ghost qi, true qi, and black qi are all the qi that exists between heaven and earth, then their essence is almost the same, the ghost qi can refine the ghost slave, and the black qi can refine the ghost slave, but now the black qi and the ghost qi are biting and fighting each other in the body of the ghost slave, which can be said to be a mountain that cannot tolerate two tigers.

Bai Yuqing analyzed this, and suddenly a flash of inspiration occurred in his mind, as if he had thought of something?

Since the black qi and the ghost qi are competing in the ghost slave's body, then only one can be left behind in order to make this method work.

Immediately, Bai Yuqing took out a dried corpse, and according to the Dafa of raising ghosts, he injected hundreds of tricks into the dried corpse, dripped blood, and manipulated the black qi to hold up the corpse, devouring the surging ghost qi to prevent the ghost qi from entering the dry corpse.

He slowly peeled off the black gas, like peeling corn, leaving only a wisp of black gas, as thin as green silk, carefully injected into the dried corpse, and after a long time, a black and transparent gaseous thing emerged from the dried corpse, swaying in the air, as if it was about to disperse as soon as the wind blew.

Seeing this, Bai Yuqing hurriedly injected black gas according to the method of raising ghosts, and the black gas appeared from the looming, seemed to disperse, and became stable, and then he continued to inject black gas into the black gas, and after a while, the black gas was about to condense, and the next breath, bang, exploded, but after the explosion, it did not rise like ghost qi, but floated back into the black gas around Bai Yuqing.

He looked lonely, and muttered in his heart: Isn't the black qi refining the black slave like the ghost qi?

Black gas and ghost gas are both gases, one can refine ghost slaves, and the other can also be refined, could it be that you have ignored something? Bai Yuqing said in her heart.

He calmed down and felt the black gas carefully, the black gas is the black gas that transforms the mana when the Heavenly Demon changes, since it is the gas produced by the magic power, it naturally has a demonic nature, and what about the demonic nature?

Lawlessness and arrogance!

Wrong! Demonic nature is a kind of character, not a substance, and black gas is a substance that really exists.

Since it is a gas, it is natural to divide yin and yang, and since black gas is a gas, it is naturally a kind of yin and yang.

Bai Yuqing did a struggle of thoughts, and after a while, he ran the Heavenly Demon Transformation again, and felt the black qi carefully, the black qi was like a flame, it was not like a fire in a lampshade, burning slowly, but it seemed to swallow the heavens and the earth, wanting to burn everything in the world.

Bai Yuqing was shocked in her heart, this black qi not only had a demonic arrogance, but also a flame-like masculine indignation.

Black gas cannot be called black gas, it should be called demonic energy, demonic nature is surging, and demonic power is fierce.

Ghost Qi and Demon Qi are both essentially Qi, but there should be slight differences. It is like a demonic arrogance, masculine and fierce, and yang. Then the same should be true of ghosts! Is the ghost energy yang or the yin energy? You can only know by perceiving and investigating like a demonic aura.

Immediately, Bai Yuqing released the power of the soul and spread along the source of the ghost qi. The ghost energy of the Soul Suppression Tower all originated from the black pool at the bottom of the tower, and he controlled the soul power to spread along the ghost qi to the edge of the black pool.

Bai Yuqing's soul felt a chill, and when he found out where the chill came from, he found that it was emitted by the black pool. Immediately, he manipulated his soul power and plunged headlong into the black pool.

As soon as the spirit was stirred, his soul trembled, and a chill that penetrated deep into the soul essence spread from the soul power released by him into his soul, making it feel like falling into an ice cave, his teeth violently colliding and shaking, and he couldn't return to his senses for a long time. The black pool is a pool of water formed by the convergence of black qi to a certain extent, but it is extremely cold, which can only indicate that the ghost qi is yin.

Bai Yuqing ran the Yuan Shi Dao Sutra, opened his mouth for a moment and let out a mouthful of hot mist, and the chill in the depths of his soul also dissipated. He muttered in his heart:

What is that eye?

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