Entering the underworld through the Yin-Yang Passage, the black palace still stands tall in the black peaks, surrounding the secluded pool, guarding the Yin-Yang Passage.

Everything doesn't look any different, the only difference is that there are many skeletons patrolling and guarding the palace.

Bai Ye came out of the Yin and Yang Passage, and was immediately discovered by these skeletons, and immediately surrounded him, rotten swords, broken swords, and bone spears pointed at him one after another, and the skeletons' eyes flashed to avoid trouble, ruthless and fearless!

"Hmph!" Bai Ye snorted coldly, and with a wave of his hand, the rich yin qi around him gathered like a tide, turning into black water and rushing towards the skeletons around him.

These skeletons were basically the worst dry bone skeletons, and they were destroyed without resistance under the tide of yin qi and black water, turning into dry bones and scattered on the ground.

However, these dry bones were scattered on the ground, and they dissipated in a moment, only to resurface in the distance, turning into new dry bones and skeletons, and killing them again into the white night.

"Huh?" Bai Ye sighed lightly when he saw this, and immediately reacted, looked up at the depths of the palace and said, "Yu Ye, come out to see me!"

In the black palace, there was no response, only more and more dry bones and skeletons were killing from all directions.

Bai Ye was impatient to play this boring game with the other party, and then set off yin qi and black waves, smashing the dry bones and skeletons that rushed over, and he raised his voice again: "Yu Ye, I have the news of blood slaughter, do you want to listen to it?"

"Fourth Senior Brother?" Finally, the voice of the dark night sounded, coming from the palace, and at the same time, the dry bones and skeletons gathered around also dissipated, like phantoms.

Bai Ye looked at those dissipated skeletons and couldn't help but say, "It seems that your battle plan is getting more and more powerful!"

"Hmph, I've already laid down almost half of the area of the Skull Plain, and the battle map of the rivers and mountains is naturally going hand in hand, even more powerful!" Yu Ye said, turning back to the front of the conversation and saying, "You met my fourth senior brother in the yang world and was slaughtered?"

Bai Ye nodded and said, "Not only did I encounter it, but I also saw the ferocity of his slaughter of a cultivator family!"

As he spoke, he told Yu Ye about the things he encountered in Poyang County.

Yu Ye listened to Bai Ye's words, shook his head with a sneer, and said: "That idiot, sure enough, he is still collecting blood everywhere and cultivating his 'Blood River Sutra', but although the 'Blood River Sutra' is majestic, vast, and powerful, it hides dirt and dirt, and there are too many impurities and blood that are fused, and in the end, it will inevitably become the biggest obstacle for him to go further!"

"Don't be afraid of fools!"

Listening to Yu Ye's evaluation, Bai Ye opened his mouth, after all, he still didn't say anything about the dragon corpse at the bottom of the sea ruins, but he remembered that the blood slaughter had also refined and controlled a dragon corpse, although it looked like the dragon corpse had been petrified at that time, but who knew if the blood slaughter had the ability to refine dragon blood from the petrified dragon corpse?

If that blood slaughter really refined dragon blood in his body, then he was not not afraid, but very difficult.

After sneering and commenting on the blood slaughter, Yu Ye looked at Bai Ye, turned to the front of the conversation, and said, "You still want to retreat and practice this time?"

Bai Ye nodded, and said with a solemn face: "I'm going to retreat for a year this time, you have to lock this place off, and you can't let anything come to disturb you." ”

Looking at Bai Ye's complexion, his eyes couldn't help flashing with aura, and he said, "It seems that you are in trouble?"

Bai Ye didn't say anything, but he didn't mean to talk to her about the yang world.

Yu Ye didn't care, and said with a chuckle: "Then you have a good retreat, I will lock this place down! But you are in a hurry, your life is not only your own, but also related to my freedom! You don't want to die in the yang world, as a result, I will be refined by the puppet seal and turned into a puppet!"

When Bai Ye heard this, he couldn't help but chuckle and said, "Don't worry! My life is very hard! In this Xuanchen Realm, the Yin and Yang Tribulation dissipates, and before you return to the Nine Demon Realm, you don't want to be free!"

"Hmph!" Yu Ye snorted coldly, said no more, and turned to leave.

And as she left, Bai Ye clearly felt that in the surrounding palaces, there were many formations and prohibitions being activated, and there were topaz skeletons and black jade skeletons patrolling and blocking in the distance, and even Bai Ye faintly saw a white jade skeleton disappear as soon as it appeared!

With such a cautious attitude, Bai Ye was a little confused.

Although he let the dark night block this place, be vigilant and not disturbed, but he didn't need to lay down so many means, right?

After all, this is their home base, is there really anything that can fight here?

"No, I'm afraid there's really a problem!" Bai Ye suddenly remembered that when he had just entered this underworld, he had seen the appearance of the dry bones and skeletons in the palace patrolling everywhere and guarding everywhere, and he hadn't thought much about it at the time, but at this time, compared with the careful arrangement around him, it became more and more suspicious.

It's just that the dark night has already left at this time, and Bai Ye has no intention of catching up and asking.

Since she didn't talk about the night, it seemed that things were still under her control.

And this time, he is going to retreat and practice, and make every effort to break through his cultivation and improve his strength.

Time is short, but there is no time to be 'nosy'.

"Let's practice first, I hope there won't be any accidents that delay my retreat practice!" Bai Ye sighed lightly, after all, he was still not at ease, and took out three two-trick puppets made of spiritual materials from the underworld to guard them around as the last protection.

Then, he sat in front of the secluded pool on the top of the mountain, and took the 'Pure Yang Essence' that looked like a spiritual jade in his hand.

The 'Pure Yang Essence' is completely condensed from the pure Yang Aura, and as soon as Fang takes out the Pure Yang Aura, it violently clashes with the Yin Qi and Death Qi that permeates the underworld.

Yin and Yang hedged, agitated and swirled, and there was thunder and light, and the pure yang aura emitted was rapidly dissipating.

Seeing this, Bai Ye hurriedly pinched the spirit trick with his hand, slapped the 'Pure Yang Essence' in his hand towards the center of his eyebrows, and put it into the Zhihai Dantian.

In the dantian, the natal spirit weapon rotates, and at the same time swallows and breathes out pure yang aura and yin qi and death qi in the underworld, refining it into mana, incorporating it into the dantian to know the sea, accumulating mana, improving cultivation and increasing strength!

Time passed in the middle of the white night's cultivation, and with the help of the 'Pure Yang Essence', his cultivation speed was indeed greatly accelerated.

However, in March, the three-layer cultivation of the foundation has reached the top, and the white night sacrifices the natal spirit weapon, and the mana and soul power are entered into it at the same time, and the fourth spiritual prohibition of the 'Yin Yang Mirror' and 'Kunlun Mirror' is successfully imprinted on the natal spirit weapon, and the natal spirit weapon is promoted to the middle grade, and the mana and soul are transformed again at the same time, and the cultivation is successfully promoted to the fourth layer of the foundation building, reaching the middle level of the foundation building!

Reaching the fourth floor of the foundation, Bai Ye spent another half a month to stabilize his cultivation, just when he was about to continue the retreat and see if he could use the remaining nine months to go up to the next level and break through the fifth floor of the foundation.

Suddenly, a loud roar came from the west of the black peak where he was, and then the entire mountain began to shake slightly!

"What's going on?" Bai Ye exclaimed, suddenly standing up and looking towards the west side of the mountain.