To enter the secret realm of Tianmen Palace from Kunlun Yuxu Palace, one must pass through the suspended "sky bridge" to reach the mountain where Tianmen Palace is located.

However, the secret realm of Tianmen Palace at this time, or more accurately, the secret realm of Tianmen Palace in ancient times, had only a bare mountain and no suspended sky bridge.

Xu Yinglian circled on his sword for a long time but still couldn't find the entrance.

In addition, she remembered that the entrance to the secret realm was located in the Yuxu Palace of Kunlun Pillar, but the Kunlun Pillar in this world had collapsed and the Yuxu Palace had never been built, so naturally there was no entrance.

So she returned in low spirits, just in time to see Qiu Changtian standing in front of the land temple, carefully looking at the entrance through which the two of them came in.

The two men came out from a tree hole of a pine or cypress, but from the perspective of the Tianmen Palace secret realm, the knots of the pine or cypress were only the size of a fist, and it seemed completely impossible to enter or exit them.

After using the Kunlun Mirror to scan carefully, it was discovered that it had the magical power of "Following the Law of Heaven and Earth" - when entering from Fenbao Rock and passing through the long corridor, people would be placed in the restriction of "Following the Law of Heaven and Earth", and their bodies would shrink continuously, until they came out of the tree hole in the center of the node, and then suddenly returned to their original state.

But the most ingenious part is that even though their bodies were shrunk and enlarged by the Fa Tian Xiang Di, the two did not notice anything unusual until they were scanned by the Kunlun Mirror and discovered the mystery.

"This is really..." Xu Yinglian couldn't help but marvel at Qiu Changtian's explanation of the mystery. "I never thought I would see this long-lost ancient magical power here."

"It is said that when this magical power is cultivated to a high level, not only can the body be enlarged or shrunk, but it can also freely transform into birds, beasts, mosquitoes, rats and ants, and can go anywhere in the sky or on the ground."

She stretched out her hand towards the pine knot, and sure enough, the closer she got to the knot, the more her palm shrank strangely as if it was illuminated by a funhouse mirror.

"Junior sister." Qiu Changtian suddenly said, "If the seawater from the outside world floods the location of the Fenbao Rock, can it flow into this secret realm through the passage?"

Xu Yinglian hesitated for a moment and replied:

"It was hard to say at first... but now it should be possible."

"Why?" Qiu Changtian asked curiously, and then immediately reacted.

In order to enter the secret realm, the two men broke down the rock wall outside.

If the original Fenbao Rock had been completely submerged in sea water, it might have been able to withstand the pressure for a period of time. But now that it has been broken, it is definitely no longer able to do so.

However, when it comes to the laws of heaven and earth...

"A Jing." Qiu Changtian suddenly asked, "Is this Fa Tian Xiang Di a formation?"

"No." Kunlun Mirror replied, "It should be part of the secret realm's restriction. It's just that the exit is fixed on the knot of this pine tree."

"The pines and cypresses, the mountains, and the ancient statue of Taiqing Tianzun are all part of the secret realm and were not brought in from outside."

"In that case." Qiu Changtian had an idea, "Can we make some minor adjustments to the mechanism of Fa Tian Xiang Di?"

"Fine adjustment?" Kunlun Jing asked in surprise, "You mean..."

"When entering from the passage outside, the body will shrink first, and then expand after passing through the tumor." Qiu Changtian said quickly, "Can this expansion step be removed?"

"You mean, it only shrinks, not enlarges?" Kunlun Mirror frowned and said, "It uses the law of heaven and earth as a channel to connect the secret realm with the outside world. I guess it is for safety considerations."

"The Law of Heaven and Earth is a very obscure and difficult spell to learn. If you rashly step into the passage of the Law of Heaven and Earth without mastering this spell, it is almost equivalent to handing your life over to the controller inside the magic circle."

"Once it is determined to be an external enemy, the controller in the secret realm can remove the step of 're-enlarging', causing the enemy to be miniaturized to the size of the knotty tree hole and unable to recover on its own."

"There are many dangers of being miniaturized, and the most affected is the Taoism. For example, your Junior Sister Xu's Great Light Flame, when she spews fire, burns mountains and boils seas, and blocks out the sky and the sun. But if she is shrunk to the size of a thumb, how much fire can she spew? This fighting method is equivalent to being directly useless."

"That's why when foreign enemies step into the passage, they realize that there is a magical effect here, so they definitely don't dare to go deep into it easily."

"In general, the deterrent effect is greater than the defensive effect. If there is no enemy, I think it is meaningless to remove the amplification link alone."

"A Jing." Qiu Changtian sighed and said, "Don't forget what the requirements of this secret realm are."

"Aren't we trying to survive?" Kunlun Jing said subconsciously, and then slowly reacted, "You mean..."

"Thousands of feet of seawater poured in, and was shrunk into a ten-foot cubic volume by the Law of Heaven and Earth." Qiu Changtian said with a smile, "In this way, this Tianmen Palace Secret Realm should be able to accommodate a lot of seawater, right?"

"I see." Kunlun Jing suddenly realized, "I can't guarantee this, but I can try."

So Qiu Changtian squatted beside the knot of pine and cypress and studied it carefully with Kunlun Mirror.

Xu Yinglian didn't know what Qiu Changtian was planning, but seeing him staying beside the pine and cypress trees, she guessed that he wanted to stay in this secret place to avoid the world-destroying disaster outside. So she simply found an open space in front of the land temple and sat in meditation calmly.

After studying the pine and cypress knots, Qiu Changtian flew up on his sword again and circled the entire secret realm several times.

"This secret realm seems to be boundless, but like the Jinchan Temple secret realm, it actually has its own boundaries." Qiu Changtian pondered and said, "If there were no restrictions of the Law of Heaven and Earth, hiding here would actually be a reasonable choice. After all, even if the secret realm is filled with sea water, it will not be randomly bombarded by stars like outside, and there will be no undercurrents sweeping across it."

"But the secret realm itself also has a boundary strength." Kunlun Mirror reminded him, "If the entrance is hit by a star bombardment, the secret realm itself will be severely deformed, and even shattered and destroyed... just like what happened to the Jinchan Temple - you can think of the relationship between the secret realm and the cultivation world as the relationship between a clothes pocket and the clothes themselves."

“If someone splashes dirty water on your clothes, it may not seep into your pockets; but if your clothes are set on fire, there is no way the pockets will be spared.”

"According to what you said, if the Fenbao Rock is hit by a star head-on, this secret realm will also be destroyed?" Qiu Changtian frowned and said, "Besides, we are in the secret realm and cannot always monitor whether there are stars falling outside. When the crisis comes, won't we be completely unaware?"

"That's right." Kunlun Mirror replied, "It's just that the probability is lower."

"Unless it is hit head-on, given the strength of this Fenbao Rock, it should not be destroyed by the aftermath of the fall. I just checked and found that this Fenbao Rock is not a naturally formed rock, but some kind of huge magic weapon that has been refined."