"After that, this thing will naturally belong to Fellow Daoist Rehuo." Before Rehuo Xianzun could finish speaking, Han Li took over his words, saying with a smile.

"Fellow Daoist Li is noble, I admire you." Rehuo Xianzun respectfully bowed to Han Li, sincerely saying.

Han Li waved his hand, picked up the jade slip, and placed it on his brow. His divine sense immediately entered it.

Immediately, his eyebrows twitched slightly.

Within a hazy azure light, small golden characters appeared. Upon closer inspection, it turned out to be a somewhat obscure and difficult-to-understand cultivation method. However, it was not the *Great Five Elements World Illusion Art*, but a method called *Dongyi Prosperity and Decline Sutra*.

After a moment, Han Li memorized all the characters, took the jade slip down, and handed it to Rehuo Xianzun.

Rehuo Xianzun quickly took it and carefully examined it.

Han Li watched as the expression on his face gradually turned from joy to disappointment, and then to resignation, a smile forming at the corner of his lips.

This *Dongyi Prosperity and Decline Sutra*, consisting of nine volumes, was also a cultivation method related to the law of time. At first glance, it seemed to share the same origin with the previous *Water Evolution Four Seasons Formula* and *Illusory Star Treasure Canon*, with intricate connections between them.

"Fellow Daoist Li, although this cultivation method is not the *Great Five Elements World Illusion Art*, it is still a secret of our sect. I hope you will not spread it." Rehuo Xianzun said solemnly after putting away the jade slip, with a sigh.

"Of course... Fellow Daoist Rehuo, if this remaining section of the Twin Birth Tree is of no other use, can you give it to me?" Han Li changed the subject and asked.

"Fellow Daoist's earlier strike was quite fierce, already severing the vitality of this immortal plant. What use is there in keeping it?" Rehuo Xianzun asked with a surprised expression.

"Alas... I was just thinking that if there's even a one in ten thousand chance to revive this Twin Birth Tree, I might have a chance to overcome my tribulation of Baleful Decay, no?" Han Li said with a bitter smile, while calculating in his heart whether he could try to revive it with the green liquid from the small bottle.

"I see, Fellow Daoist, take it then." Rehuo Xianzun immediately understood, saying with a smile.

"By the way, do you know how Senior Mu Yan used the Twin Birth Tree to overcome Baleful Decay back then?" Han Li asked as he carefully put away the remaining Twin Birth Tree.

"This... It concerns Senior Mu Yan's cultivation, so I don't know. But I imagine it wouldn't stray from the path of drawing out the baleful aura and hiding it in external objects." Rehuo Xianzun shook his head and said.

"I thought so too. This explains why Senior Mu Yan's corpse suddenly transformed into baleful energy. It's likely related to the fact that the Twin Birth Tree inherently contained a large amount of baleful aura." Han Li nodded.

After finishing packing, the two did not leave immediately, but waited for the injury on Rehuo Xianzun's arm to mostly recover before exiting the underground palace together.

"If the Twin Birth Palace doesn't have it, there are only a few places left. If Hidden Truth Valley hasn't separated from this continent, it's not too far away. Let's go there and take a look first." Back at the square, Rehuo Xianzun glanced at the distant sky and said to Han Li.

"I wonder, what was Hidden Truth Valley originally in your sect?" Han Li asked with some doubt.

"Hidden Truth Valley is where the Ancestor usually secluded himself. Except for giving lectures or attending to important sect matters, the Ancestor spent most of his time there, so it is also a possible hiding place for the *Great Five Elements World Illusion Art*." Rehuo Xianzun explained.

"Alright, then let's go there first." Han Li nodded.

Then, the two steered the flying boat, heading towards Hidden Truth Valley under the guidance of Rehuo Xianzun.

During the flight, looking down from the high altitude, the earth was scarred and devastated, filled with traces of terrifying power everywhere.

Seeing this scene, Han Li couldn't help but recall the scene he saw when he crossed over, especially the earth-shattering palm that descended from the sky, still feeling lingering fear.

At the thought of this, he couldn't help but raise his head and look towards the distant sky. It was clear blue, infinitely azure, and naturally, there was no more smoke rising.

About three quarters of an hour later, the flying boat crossed a large expanse of ruins and arrived above a wide plain, slowing down and moving forward slowly.

"Fortunately, this Hidden Truth Valley hasn't collapsed and is still connected to the Mu Huang Domain." Rehuo Xianzun looked at a cyan valley in the distance, a smile forming at the corner of his lips, and said.

Light flickered in Han Li's eyes as he also sized up the valley. The peaks on both sides were not too high, and the terrain in the valley was quite flat, reflecting sunlight without appearing deep or narrow.

"At first glance, this Hidden Truth Valley doesn't seem like an important place. There should be some special restriction methods inside, right?" Han Li asked with some doubt.

"Haha, Fellow Daoist Li has misunderstood. Hidden Truth Valley is indeed not the place with the richest spiritual Qi in the sect, and I haven't heard of any secret restrictions being set up. The reason why the Ancestor chose this place as a place for secluded cultivation is simply because he liked the ethereal bamboo in the valley." Rehuo Xianzun said with a smile.

"In that case, I was overthinking things..." Han Li said, slightly stunned.

As they spoke, the two had already arrived at the entrance of the valley.

Before they landed, they heard bursts of "ding-dong" sounds, mixed with sharp whistling sounds, forming an ethereal and pleasant melody that came from the valley.

"This is..." Han Li heard the sound and suddenly felt a brightness in his ears, unable to help but mutter.

"This is the ethereal bamboo music. It's the sound of the mountain wind blowing on the ethereal bamboo, and the sound produced when the bamboo bodies collide with each other. It has been said to have the effect of clearing the mind and clarifying ambitions." Rehuo Xianzun closed his eyes to feel it for a while before leisurely explaining.

"No wonder Ancestor Mi Luo chose this place for secluded cultivation. It is truly a wonderful place for quiet cultivation." Han Li couldn't help but praise after hearing this.

"This is just the entrance of the valley. There is another kind of spirit bird called the Wind Chime Magpie in the valley. Its chirping is melodious and blends with the ethereal bamboo music. That is the true wonderful sound of the world." Rehuo Xianzun said with some pride.

Walking into the valley, Han Li soon saw clusters of lush green bamboo, scattered on the slopes on both sides. The bamboo bodies were slender and straight, looking quite light and agile, and colliding with each other under the gentle breeze of the mountain wind, making "ding-dong" sounds with empty notes.

The deeper they went, the denser the bamboo forest became, almost occupying all the places in the valley, leaving only a six-foot-wide stone slab path for Han Li and Rehuo Xianzun to walk on, winding into the depths of the bamboo forest.

Listening to the ethereal bamboo sounds constantly echoing around, Han Li's mood gradually calmed, and he truly had a bit of a pleasant feeling.

Rehuo Xianzun on the side seemed to be the same, and the frown that had been tightly furrowed for days finally relaxed a bit.

After advancing for more than half an hour, a fog rose in the bamboo forest at some point, obscuring the surroundings in a hazy manner, making the sound of the ethereal bamboo music sparse and faint.

Han Li looked at the increasingly thick gray-white fog in the depths of the bamboo forest, his brow suddenly furrowed, and a trace of uneasiness arose in his heart.

A flash of purple light appeared in his eyes, and he swept around, only to find that the farthest distance he could see was only a hundred zhang. Beyond that, it was as if he could see with the naked eye, a hazy blur that he could not see clearly.

What surprised him even more was that the ethereal bamboo deep in the fog, whether it was the bamboo body or the bamboo leaves, had turned into a strange gray-white color. When they shook and collided, they hardly made any sound.

"Fellow Daoist Rehuo, this fog seems a bit wrong. It has a strong suppression on the power of divine sense, and it seems to be faintly mixed with some baleful aura. Could it be that we accidentally triggered some restriction in the valley just now?" Han Li asked with a slightly furrowed brow, collecting his mind.

"The Ancestor once ordered that no restrictions should be set up in Hidden Truth Valley, nor should disciples be restricted from entering the valley. So I have been here many times. Occasionally, there is fog condensing in the morning, but it is all thin spiritual fog. I have never seen such a strange fog like the one in front of me... Could it be that it was born after the sect's changes?" Rehuo Xianzun also felt a little uncomfortable and said.

"No matter what, it is definitely not a good thing for the power of divine sense to be suppressed to such an extent. We must be on high alert." Han Li said with a tightly furrowed brow.

As soon as he finished speaking, a sound of piercing air suddenly rang out.

Hundreds of clusters of faint green light suddenly lit up in the thick fog in the depths of the bamboo forest, shooting from all directions like ghost fires.

"Be careful..."

After Han Li gave a low shout, he turned his right hand over, and a flash of golden lightning appeared in the palm of his hand. The Azure Bamboo Bee Cloud Swords had already appeared in his hand, with golden electric arcs flashing and crackling.

With a wave, golden lightning immediately condensed into a bundle, sweeping around like a long whip.

Rehuo Xianzun on the side took out the golden ancient mirror with one hand, and before he could activate it, he had already grasped a large crimson banana fan with the other, fanning it towards dozens of clusters of green ghost fire in front of him.

"Zzzzz..."

The long whip formed by the Evil-warding Divine Lightning drew a golden arc in front of Han Li, instantly sweeping across the clusters of ghost fire, making bursts of rumbling.

The hundred or so clusters of ghost fire shattered like ripe watermelons, but did not dissipate. Instead, they dispersed into countless fist-sized green fireballs, slowing down slightly, but still flying towards them.

"Whoosh" "Whoosh"

Clusters of fire patterns lit up on the crimson banana fan, and clusters of crimson fireballs, similar in size to the green fire, shot out, colliding violently with the green flames in mid-air, scattering in all directions.

The sparks from the scarlet and green flames were mixed together, and some seemed to cancel each other out, their lights extinguishing and all disappearing.

"Fellow Daoist Li, these things seem to be restrained by scarlet flames!" Rehuo Xianzun shouted loudly.

Han Li had naturally noticed this long ago. With a thought, a little silver light lit up on his shoulder, and then a palm-sized silver flame little man emerged.

The little man first stretched his arms and yawned, then tilted his head slightly, rubbed his fists and palms at the surrounding green flames, looking like he was about to do a great job.