"What a tough one..."

Wang Yu frowned, looking at the corpse demon that had reappeared after the lightning vanished.

Although this thing had little intelligence, its physical strength was no less than that of a true Taiyi Jade Immortal. The previous Lightning Summoning Technique had managed to injure it all over, but it was not enough to kill it.

And in the current situation, he couldn't afford to waste time.

Just as Wang Yu was contemplating whether to use the Green Bamboo Bee Cloud Swords that had been nurtured for the longest time in the Profound Heaven Gourd, or summon the Essence Flame Firebird to incinerate and refine it, Mo Guang's voice suddenly echoed in his mind:

"Friend Wang, although this thing belongs to the Yin Fiend ghost category, its cultivation level is not low. It has a certain resistance to thunder and fire techniques. It will take you some effort to deal with it. How about leaving it to me?"

"You have a way to kill this fiend?" Wang Yu asked.

"This thing is formed from Yin souls entering a corpse without dissolving, absorbing evil energy and solidifying. I happen to know its vital weakness and have a good way to deal with it. As long as Friend Wang agrees, I can kill it in a moment," Mo Guang replied.

Hearing this, Wang Yu pondered for a moment before a luminous glow appeared on the index and middle fingers of his right hand, from which a flower pattern emerged.

In the void beside him, a silver light gate about ten feet high opened up.

At the same time, Wang Yu summoned with his left hand, and the Mantra Treasure Wheel immediately spun rapidly, shrinking sharply and flying into his sleeve, disappearing from sight.

Without the restriction of the power of the Time Law, the Taiyi Corpse Demon immediately regained its mobility, but still maintained its original diving posture, heading straight for Wang Yu's forehead.

With a soft "swoosh" sound.

A black figure flashed out from the silver light gate, blurring and appearing in front of the Taiyi Corpse Demon. One of its hands, condensed from evil energy and wrapped in dark red light patterns, reached out and pierced through the junction of the corpse demon's chest and abdomen.

The black figure was naturally none other than Mo Guang, who had merged with the gray immortal corpse.

At this moment, in the hand that pierced the corpse demon's body, he was holding a fist-sized piece of black flesh.

The flesh was shaped like a heart but had seven orifices, from which an extremely dense evil energy surged. As it contracted and expanded, it seemed to be beating and breathing.

"The corpse demon's true weakness and vital point is not in the dantian, not in the head, not in the heart, but in this thing called the 'Fiend Embryo'. It relies on this to gather evil energy and transform into a corpse demon. But precisely because of this, this vital point can withstand blades and spears, but cannot withstand the attack of evil energy," Mo Guang explained to Wang Yu, slowly withdrawing his hand.

As soon as his voice fell, the corpse demon's remnant corpse, like quicksand, transformed into countless purplish-black particles scattered on the ground, then shattered into a cloud of black dust and dissipated.

"Friend Wang, this Fiend Embryo..." Mo Guang looked at Wang Yu, revealing a hint of inquiry.

"Since the corpse demon was personally killed by Friend Mo Guang, this Fiend Embryo naturally belongs to Friend Mo Guang," Wang Yu nodded and said.

"Then thank you," Mo Guang said, and with a wave of his hand, he crushed the Fiend Embryo into powder.

Purple light circulated inside, revealing a round bead crystal the size of a dragon's eye. Before Wang Yu could see it clearly, he casually tossed it into his mouth.

"Friend Wang, if there is nothing else, I will go back temporarily and continue to cultivate in seclusion," Mo Guang said.

"Thank you for your trouble," Wang Yu nodded.

Hearing this, Mo Guang turned around and stepped into the silver light gate, returning to the futon in the main building and sitting cross-legged.

Wang Yu slightly bent his fingers, and the silver light gate gradually converged, then disappeared.

Seeing Mo Guang's figure disappear, Wang Yu's gaze slowly darkened. He turned his hand and took out a pill, swallowed it, and after staying in place to adjust his breathing for a moment, he continued to walk towards the depths of the palace.

Arriving in front of the stairs leading to the third floor of the palace, Wang Yu was not in a hurry to go upstairs, but released his divine sense to scan the entrance.

The burly man carrying the wide sword had entered the second passage, and should have entered this palace as well, but he had not encountered this person along the way, and had not even found any traces of him. This was really strange.

Could it be that he did not enter here?

After checking for a while, Wang Yu did not find anything strange, and then continued to slowly climb the stairs.

As soon as Wang Yu entered from the entrance of the third floor, he saw an old screen not far in front of him. The landscape paintings drawn on it were severely faded, and he could no longer see their original appearance, leaving only a rough outline.

The tattered canvas was covered with crisscrossing cuts, and even the frame had deep and shallow sword marks and cracks. It was a miracle that it was still standing.

Wang Yu took a step forward, and his eyebrows twitched imperceptibly.

After his steps paused slightly, his expression returned to normal, and he continued to walk inside.

Coming close to the screen, he saw through the holes in the screen that there were several antique shelves scattered in the hall, displaying various flower and bird bottles, and some cyan-black books, which seemed to be a study.

However, when he went around the screen, he found that there were nearly a hundred such antique shelves, but most of them had been completely smashed. What he saw through the screen were just a few remaining ones.

Wang Yu walked slowly through the collapsed antique shelves, picked up one of the relatively intact cyan ancient books and looked at it, and found that the book's cover was written in ancient seal characters, "Record of Gold and Stone".

When he opened it, he found that this book was actually just a book on the study of gold and stone collections, not some kind of cultivation technique or secret manual.

Afterwards, he picked up several other books in succession, and found that they were all ordinary miscellaneous books of various categories.

"It seems that this place should be someone's residence, and it seems to be an interesting person with a wide range of hobbies," Wang Yu muttered to himself, and continued to walk inside.

After passing through layers of palace gates, Wang Yu arrived at the deepest part of the third floor of the palace.

As soon as he crossed the palace gate, Wang Yu immediately felt as if he had entered a barrier, and immediately felt a strong force of the Time Law coming towards him.

His eyes narrowed, and he looked inside. He saw that the center of the hall was filled with shimmering water, and there was actually a blue pool about twenty or thirty feet in radius. The inside was sparkling and translucent, looking extremely clear.

Wang Yu's heart tightened, and the words "Water of Time" instinctively appeared in his mind.

Is the power of the Time Law so strong?

Could it be that the blue liquid in the small pool is the Water of Time?

Wang Yu's mind moved, and he carefully explored the blue pool with his divine sense for a moment, and his brows could not help but frown. He found that in addition to the fluctuations of the Time Law in the pool, there was also an extremely strong aura of vitality.

He walked a few steps closer and looked into the pool, only to find that in the place where his sight had been blocked just now, there was a corpse floating in it.

"It's actually him?" After seeing the corpse's appearance clearly, Wang Yu could not help but be surprised.

The corpse was no more than five feet long, and its body looked as thin as firewood, but its head was unusually large, giving a very unbalanced feeling, as if it was about to fall headfirst into the water at any time.

However, it did not show any instability at all, but lay peacefully on the water, its eyes slightly closed, its expression natural, looking as if it was asleep.

This strange alien race with the appearance of a big-headed baby was exactly the same as the statue he had seen at the entrance of this Water Evolution Palace.

It was just that Wang Yu did not expect to meet him again in such a situation here.

The corpse of the big-headed child was well preserved, and there seemed to be no damage on the surface, but there was no fluctuation of breath on its body. It looked as if it had just died not long ago, which was completely different from the rotting corpses and white bones that Wang Yu had seen before.

Wang Yu's eyes flickered slightly, and his gaze slowly moved away from the child's face, landing on the surface of the water beside him. There, he saw a two-foot square blue shield floating, with intricate patterns engraved on it, shining with dazzling crystal light.

And no more than three inches away from the shield, there was also a floating blue crystal flute, with a row of smooth holes opened on it, and a tassel made of seven or eight bamboo leaves hanging from one end, which looked quite delicate.

These two things looked full of spiritual energy, and did not weaken in the slightest due to the passage of time. Moreover, they both exuded a strong aura of the Time Law, and were obviously Time Law immortal artifacts of no low rank.

Wang Yu naturally coveted these two things, but he did not act rashly. Instead, he slightly tilted his body, and purple light flashed in his eyes. His gaze shifted and he peeked at a circular stone pillar in the northwest corner of the hall.

The burly man named Ren Hao, carrying a wide sword, had used some kind of magic weapon to integrate his figure with the entire light blue stone pillar, and his aura was almost completely obscured.

Wang Yu's fifth layer of the Refining Spirit Technique had been initially successful, and his divine sense was more sensitive than before. Therefore, when he stepped onto the third floor of the palace, he had already sensed the fluctuations of Ren Hao's aura, but he could not determine his location.

At the same time, he also knew that the other party had also discovered his tracks. In order not to startle the snake, he had been pretending to be completely unaware, and searching the entire third floor of the palace in a grand manner.

Just then, Wang Yu's eyebrows suddenly rose, and his figure suddenly blurred, disappearing from the spot.

In an instant, his figure landed on a crossbeam above the palace, and the aura on his body suddenly retracted, and even the fluctuations of his divine sense were completely suppressed, as if he had suddenly evaporated from the world.

Not long after he hid his figure, a bright red figure emerged from the staircase of the third floor hall. It was Feng Qingyuan.

His face was slightly pale, his expression seemed a little nervous, and he walked slowly towards this side.

When he passed through the collapsed antique shelves, he also checked the scattered books like Wang Yu, and after finding that they were not immortal secrets, he threw them aside casually.

Afterwards, the nervous expression on his face eased slightly, but the speed of his advance became even slower.