After absorbing this power, Bai Yunfei suddenly realized that the energy he had absorbed during his previous practice did not contain this kind of yin energy.

I was confused and didn't know what was going on.

With a thought in his mind, his consciousness fell on the Soul-Devouring Heavenly Fire.

Only at this moment did I discover that the Soul-Devouring Heavenly Fire had actually undergone a slight change.

In the flames, a phantom figure of a mantis actually appeared. It was very agile, yet still retained its ferocious nature.

However, he was trapped in the Soul-Devouring Heavenly Fire.

He looked surprised and didn't know what was going on.

The soul-devouring heavenly fire was released, and the illusory mantis came to life, constantly changing with the heavenly fire.

After studying it for a while, he still didn't understand anything, so he simply put it away again.

He walked towards the place that seemed to be the source of darkness.

Even if the moonlight from the sky is shining, it seems to be blocked when it falls here.

It is like the mouth of an abyss, waiting to swallow everything.

In just a moment, in the darkness, there was another unusual movement.

Bai Yunfei didn't hesitate at all and directly summoned the Soul-Devouring Heavenly Fire.

The horrifying flames immediately enveloped the source of darkness.

Then there was a sizzling sound.

The darkness seemed to be burned and became smaller and smaller.

But at the same time, a shrill roar came from inside.

In an instant, a monster appeared again in the soul-devouring heavenly fire.

This is the appearance of a flying ant, but its teeth, which look like steel knives, are terrifying.

Could this be another monster with yin attributes?

After a moment, the darkness shrank to the size of a fist and that was it.

When the Soul-Devouring Heavenly Fire was taken back, sure enough, there was a drop of black liquid inside.

The Yin energy once again filled the Dantian.

A feeling of completeness emerges.

It is not the perfection of inner strength, but a kind of perfection in attributes.

All that’s missing is the technique.

A fist-sized piece of darkness was suspended in the air, emitting a chilling aura.

But there was no longer any change.

After finding nothing unusual, Bai Yunfei came back to the horse and began to meditate.

Perhaps the horses were too tired during the day and did not wake up.

The temperature at night is completely different from that during the day. Fortunately, we prepared warm clothes for the horses, otherwise we would have to walk the next day.

Although he was practicing, part of his mind was still focused on the darkness.

Half an hour before dawn, Bai Yunfei, who was meditating, noticed something strange.

There was something strange happening in the desert.

A rustling sound came from a distance.

Soon, in the darkness of the night, the desert began to undulate, and from far and near, there was an object running fast under the sand.

When it reached the darkness, this thing came out from under the desert.

It turned out to be a sandworm several meters long.

This kind of thing is very rare and usually lives under the desert.

But this sand worm is a dark blue in color all over, and it shines with a unique glow.

But when the sand earthworm rushed out and saw that the darkness was only as big as a fist, it let out a dull cry.

"Moo!"

It actually sounded like the mooing of a cow.

The beast rushed desperately towards the darkness.

But the fist-sized darkness did not move at all, nor did it react at all.

Bai Yunfei understood that the beast had probably come out before and wanted to go back now, but this place was refined by the Soul-Devouring Heavenly Fire and could never go back.

There was a feeling of urgency, and the monster seemed to be becoming more and more anxious.

The cry startled the horse, but Bai Yunfei sent a stream of mental power over it and the horse fell into a coma again.

He rushed forward and soon reached the sand earthworm. Without saying a word, he used his hand to cover the sky.

The terrifyingly powerful martial arts immediately drove the beast into the desert, and then the soul-devouring heavenly fire devoured the beast.

There were continuous screams, and Skyfire flew back with a ball of black liquid.

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Just as he entered the Dantian, a sound was heard again from afar.

Bai Yunfei seemed to be surprised.

One after another, nearly ten monsters came here.

However, Bai Yunfei killed almost every one he saw, mainly because the power of the Soul-Devouring Heavenly Fire was too terrifying.

Just as daybreak was about to break, a black figure appeared in the distance.

This person was wearing a dark grey robe that covered his entire body. There were empty spots under his feet, as if he was floating over. His target was actually this place.

However, the moment he saw this person, Bai Yunfei showed a look of realization.

The person I met in the mine before had the same aura as this person.

This is the breath of a person from the ghost world.

The person who was approaching stopped in an instant and faced Bai Yunfei. The two were only about five meters away from each other.

"Who are you? Why are you blocking my way?"

An extremely pure human accent flowed out of this person's mouth.

Bai Yunfei was stunned for a moment. It turned out that these people from the ghost world spoke the same language.

"I am just passing by here, how can I block your way?"

After hearing what Bai Yunfei said, the man was stunned for a moment and said, "In that case! Please give way, I want to go back!"

After hearing this, Bai Yunfei secretly laughed in his heart and thought, "Let's see how you respond?"

He took a few steps back.

When the man saw Bai Yunfei like this, he breathed a sigh of relief. He just shook his body and arrived at the dark place.

However, when he got closer, the man screamed, expressing his anger.

He turned around and looked at Bai Yunfei and shouted: "Is it you?"

Bai Yunfei looked helpless, waved his hands and said, "I don't know what you are talking about?"

The man suppressed his anger and stared at Bai Yunfei with a bloodthirsty madness in his eyes. But at this moment, he turned around and faced the fist-sized darkness. His body seemed to be misted, and then turned into a stream of air and poured into the darkness.

Bai Yunfei was shocked to see this person actually got in like that.

I already have an understanding in my mind that this darkness should be a space channel, connecting the Holy Yuan Realm and the Ghost Realm.

Bai Yunfei just watched the man leave without any intention of taking any action.

Because this person's strength is at least at the Lingwu realm, Bai Yunfei has no confidence at all if the two were to face off.

A moment later, the man's figure completely disappeared from sight.

The morning light has already appeared in the sky.

The fist-sized darkness began to fade with the arrival of dawn, and after ten breaths, it completely disappeared.

The temperature gradually rose and the scorching sun appeared again above the desert.

The horses have woken up, and Bai Yunfei rides them quickly towards his destination.