"The five elements are born together, the five elements are mutually restrained, the flame palace, the ancient tree palace, the sand sea, the forest, the fire attribute aura, the wood attribute aura......" Lu Chen groaned.

Chu Ruonan held his breath and stared, for fear of disturbing Lu Chen's thoughts.

Suddenly, a glint appeared in Lu Chen's pupils.

If the entire sinister secret place was regarded as a huge five-element formation, everything seemed to be easy to explain. He first entered this treacherous and secret place, into the sea of sand. There is only a strong fire attribute aura between the heaven and earth of the sand sea, and there is no other attribute aura, and the sand sea actually means the fire of the five elements.

After leaving the sea of sand, he came to this dense forest. The heaven and earth of the forest only have a strong wood attribute aura, and there is no other attribute aura, and the forest means the wood of the five elements.

The sand sea and the forest are adjacent.

The fire attribute aura and the wood attribute aura are next to each other.

And among the five elements, there is no fire and wood, fire and wood, and wood and fire. In this way, the sand sea is adjacent to the forest, and the fire attribute aura and the wood attribute aura are adjacent, which can only mean that the wood makes the fire. Wood fire is one of the principles of the five elements, and in order to crack the green disc in front of the ancient tree palace, it is necessary to use the principle of the five elements.

Lu Chen informed Gu Linglong of his inference.

"There is only one chance, are you sure you want to use the five elements to generate each other?" Gu Linglong reminded.

Lu Chen nodded slightly.

He deduced that this array was based on the principle of the five elements, and he did not speculate randomly, but found conclusive evidence to confirm his inference. As for the five elements, he couldn't even find conclusive evidence. At this moment, there is only one chance, to choose one of the five elements and the five elements, he chose the five elements to try.

"You deduce that the five elements are born together, and as I said, let her move the four circles and the central disc from the outside in. Gu Linglong said.

Lu Chen nodded, and then ordered Chu Ruonan.

"Do you really have a way to unlock the magic of this green disc?" After hearing this, Chu Ruonan said excitedly.

She didn't know that Lu Chen was not thinking alone, but working with Gu Linglong to analyze the secret of the green disc.

"I'm not sure yet, but I'll soon find out if I can. Lu Chen advised, "Next, do what I instruct, there can be no deviation, otherwise the previous efforts will be wasted." ”

Chu Ruonan nodded heavily, waiting intently for Lu Chen's instructions.

"From the outside to the inside, the outermost circle is Dongyin Mao Zhenmu, the second outer circle is Beihaizi Kanshui, and the inner circle is Xishen Youyou ...... gold," Gu Linglong said slowly, her voice only echoing in Lu Chen's mind.

Lu Chen then conveyed Gu Linglong's words to Chu Ruonan, and at the same time instructed Chu Ruonan to find the runes one by one, and urged the green radiant disc step by step from the outside to the inside.

Chu Ruonanyu pointed out, extremely nervous, afraid that he was a step slower, or a step faster. At this moment, she only felt that it would take more effort and strength to activate the 57,000 dark green runes with her qi and spiritual power than before.

Click......

At the moment when the central disc was stirred, the green disc suddenly erupted with a sound.

"It worked. Lu Chen shouted.

Chu Ruonan secretly breathed a sigh of relief.

At this moment, the green disc seemed to melt, and the volley turned into a mass of green liquid in the air. At the same time, the green liquid mass void flowed, and it took the initiative to wrap towards Chu Ruonan.

Before Chu Ruonan could react, he was completely wrapped in a green liquid mass. Then the green glow faded and finally disappeared.

Lu Chen witnessed this scene and stretched out his hand to touch Chu Ruonan. Although Chu Ruonan was close in front of him, Chu Ruonan was like a figure reflected in the water after being wrapped in green droplets, and his outstretched arm passed directly through Chu Ruonan's body, and there was no real touch.

Glancing at the place where Chu Ruonan had disappeared, Lu Chen said in his heart that his previous guess was correct, sure enough, only those who had innate wood spirit roots and cultivated wood attribute exercises could be recognized by the Ancient Tree Palace.

Suddenly thinking of something, Lu Chen's face changed slightly, and he hurriedly looked down, fortunately, the many gorgeous petals that lingered around him did not disappear immediately due to Chu Ruonan's disappearance.

After a moment's silence, he chose to retreat into the forest for the time being, keeping a safe distance from the ancient tree palace.

Although the many gorgeous petals that haunted him had not completely disappeared at the moment, he was not sure when they would disappear. Once the gorgeous petals disappeared, he was not an innate wood spirit root and an acquired cultivation of wood attribute exercises, at that time, if he continued to stay in front of the Ancient Tree Palace, he would have to withstand the powerful dark green branch spear attack from the Ancient Tree Palace.

The figure flickered, and Lu Chen came to the forest, where he restrained his breath and lurked in the dense canopy of an ancient tree.

At this time, a blue-scaled snake swam along the dark green branches, raised its triangular head, and stared at Lu Chen, the scarlet snake letter was endless, as if announcing to Lu Chen that this was its territory.

Lu Chen didn't look at the blue-scaled snake that was wandering over, the breath on his body escaped slightly, and the green-scaled snake suddenly trembled, and then ran away like a smoke.

"This ancient tree palace is the same as the flame palace under the sand sea, there is a fire attribute treasure in the flame palace, and there must be a wood attribute treasure in this ancient tree palace, but now it is cheaper for others. We tried to get nothing. Lu Chen instructed Chu Ruonan to open the green disc, but in the end, Lu Chen did not enter the ancient tree palace, and Gu Linglong was very dissatisfied.

"It's not for nothing. Lu Chen shook his head slightly, after knowing the principle of the five elements, he already had a bold guess in his heart.

"What do you mean?" Gu Linglong was puzzled.

Lu Chen said slowly: "This formation is based on the principle of the five elements, since this is the case, it is impossible for the five elements to be born only fire and wood. Otherwise, it is the principle of wood making fire, how can the five elements be born together. And the flame palace below the sand sea is the fire of the five elements, and the ancient tree palace in the forest is the wood of the five elements, and there must be three other magical palaces in this dangerous and secret place. Among the three palaces, one palace is the water of the five elements, one palace is the earth of the five elements, and one palace is the gold of the five elements. I am an innate golden spirit root, and I have cultivated the Divine Sword Sword Technique the day after tomorrow, and I am a flame palace, an ancient tree palace, a water palace, and an earth palace, these four palaces are not of much use to me, but the palace of the five elements of gold is extremely useful to me. Now that I have opened this Ancient Tree Palace, I have enough experience to know how to open the Five Elements Palace. Next, as long as you find the Golden Palace, you can easily open the hole without worrying about the danger of failure. ”

After listening to Lu Chen's words, the dissatisfaction in Gu Linglong's heart gradually disappeared.

After a little groaning, Lu Chen decided to wait here for Chu Ruonan to walk out of the Ancient Tree Palace.

First, just now, Chu Ruonan was wrapped in green droplets, and he couldn't hand over the Hundred Flowers Spirit Vine to Chu Ruonan. If he left like this, this dangerous and secret place was very vast, and he didn't know when he would be able to meet Chu Ruonan again.

Second, although he guessed some secrets of the Five Elements Palace, he didn't know if his guess was true. Taking a step back, if his Five Elements Palace's guess was true, he didn't know where the Golden Palace was located at the moment. And the Five Elements Palace formed a Five Elements Bagua Array, and there must be a connection between the five palaces. At this moment, Chu Ruonan has entered the Ancient Tree Palace, maybe Chu Ruonan will find something in the Ancient Tree Palace. When Chu Ruonan walked out of the Ancient Tree Palace, he might be able to discover the secrets of the Golden Palace from Chu Ruonan's mouth.

Lu Chen glanced at the Ancient Tree Palace not far away, since Chu Ruonan entered the Ancient Tree Palace, there had been no movement in the Ancient Tree Palace.

After a moment's pause, he withdrew his gaze.

Immediately, he held his breath and condensed, cut off many distracting thoughts, and then took out a demon beast core from the storage bracelet to use his skills to condense his qi.

He didn't have many spirit stones for his storage bracelets, but there were a lot of beast cores.

The vast majority of the Demon Beast Cores were the trophies he had harvested after slaying the people of the One Hundred and Eight Caves of the Bone Devouring Forest. Some of the beast cores were obtained by forming a temporary team with Caifeng and others when they first entered the Tianyi Miasma, hunting the demon beasts in the Tianyi Miasma. Some of the beast cores were given to him after Xiao Leyou and Yao Xinyue killed the demon beasts when they came to the entrance of the secret place before. There are also some beast cores that he harvested after Chu Ruonan killed the demon beast on the way to this ancient tree palace with Chu Ruonan not long ago.

Now these cores come in handy.

As he continued to cultivate day and night, the beast cores shattered.

Lu Chen dug out small wooden pits on the dark green branch where he was sitting, and in the small wooden pits stored the demon beast cores that had been shattered by his exhaustion of strength due to his cultivation.

On this day, he was cultivating without distractions, and another sound of the beast core shattering came out, and then he could no longer draw any strength from the beast core in his palm.

With a flick of his hand, the Shattered Beast Core fell to the seventh small wooden pit not far away, filling in the seventh small wooden pit.

Although he didn't carry a time-keeping treasure on his body, by accumulating the demon beast cores consumed by his own cultivation, Lu Chen judged that he had been cultivating here for at least five days.

He turned his head to glance at the Ancient Tree Palace not far away, and the Ancient Tree Palace still didn't move.

Just as Lu Chen was about to take out another Demon Beast Core from the storage bracelet to cultivate, there was a sudden movement in the Ancient Tree Palace not far away.

"Whew!"

A green glow shot out from the portal of the ancient tree's palace, straight towards his hiding place.

Lu Chen was about to dodge the attack of the green mang, and suddenly a familiar fluctuation of spiritual power came from the green mang.

Frowning slightly, Lu Chen stretched out his hand to intercept the flash of green. At this time, the green mang took the initiative to reduce its speed and slowly fell to Lu Chen's fingertips.

The green mangs changed for a while, and turned into a green and beautiful face, which was Chu Ruonan's appearance.

"How can you see through my hiding place?" Lu Chen asked with a frown, his gaze narrowing into his fingertips.

Seeing Lu Chen's surprise, the corners of Chu Ruonan's mouth appeared slightly, she seemed to be happy to see Lu Chen like this, but she didn't hide it, and explained to Lu Chen truthfully: "I entered the Ancient Tree Palace, with the help of the magic of this Ancient Tree Palace, I can know every move nearby, as long as you are still near the Ancient Tree Palace, no matter where you are hiding, I can find you." ”

Lu Chen came over suddenly, it turned out that it was not Chu Ruonan's own ability, but related to the Ancient Tree Palace.

"What's going on inside?" Lu Chen asked.