With the help of the gorgeous glow emitted by the Golden Rainbow Sword, Yin Tiancheng walked forward along the tunnel without any movement along the way.

But when he reached the end of the passage, Yin Tiancheng was a little amused and crying. He found that two stone doors blocked his way.

Unexpectedly, there were obstacles inside, which made Yin Tiancheng hesitate. Is it a mysterious cave with many secrets behind the door? Or is it like the previous experience when I pushed the door in, and I fell into a dangerous illusion in an instant?

At this moment, Yin Tiancheng was a little excited and couldn't control himself, but he finally made up his mind that even if it was the nest of the mirage demon, he would go in and see the movement.

So he carried the sword in his backhand and pushed the stone door with one hand, but found that it could not be pushed like an iron cast. Even if he used the effort to eat, it still had no effect.

Yin Tiancheng suddenly remembered the experience in the deep cave of the blood pool of Murong Mansion. Now he encountered almost the same situation as at that time, which made him a little angry and determined to destroy the stone gate blocking the way.

Yin Tiancheng quickly destroyed the Golden Rainbow Sword in his hand, and a dazzling sword light suddenly appeared and pointed at the stone gate in front of him.

"Boom!" The sword light instantly slashed onto the stone gate, making a rumbling sound, but after everything fell silent, the stone gate was safe and sound, and there was not even a crack on the door.

Yin Tiancheng was stunned, and then waved several sword lights in a row without believing in evil, but the result was still silent like a mud cow entering the sea.

The Golden Rainbow Sword, which is a magic weapon, cannot destroy two ordinary stone doors, which is a bit surprising.

Yin Tiancheng was about to swing his sword and strike again, but suddenly changed his mind because he saw several lines of green runes appearing on the door.

Although these runes are fleeting, they are enough to make Yin Tiancheng realize the mystery of the stone gate.

The reason why these two stone doors are unbreakable is that the Mirage Demon has set up a protective cover similar to a barrier, which protects the stone door from any damage.

Before this, Yin Tiancheng saw records of related magic in a cultivation secret book in the scripture hall. Once this barrier of special nature is successfully set up, it will be connected with the mountains and rivers where it is located, and will share weal and woe.

Unless you can destroy the entire Ganzao Mountain, this special barrier will exist forever and will not disappear.

This solid stone gate made Yin Tiancheng feel a deep sense of frustration, but he was unwilling to leave dejectedly, so he had to look up and down, hoping to find a way to solve it.

He knew in his heart that the demon also entered the spiritual sleep through here, which shows that there must be a way to open the door that he did not know yet.

Hard work pays off. After a stick of incense has passed, Yin Tiancheng can see a hint of clue.

He found that the rock wall on the right side of the stone gate was filled with a little bit of dark green light. It was so weak that it was completely hidden in the rays of the golden rainbow sword in his hand. If it weren't for careful observation, it would be difficult for anyone to discover it.

Yin Tiancheng walked along the green light and found that the glimmer was revealed from a cracked gap on the rock wall. He was about to squint his eyes and see clearly when the glimmer light suddenly went out.

Yin Tiancheng was suddenly a little disappointed, but he immediately guessed the reason, so he swung the Golden Rainbow Sword lightly and aimed at the stone gate to swing a tentative sword light.

Sure enough, when the blue rune was vaguely displayed on the door, this faint green light shone out again.

This time, Yin Tiancheng looked at it in a real way. He found that there was an object hidden behind the rock wall that was temporarily unrecognizable, and the green light was emitted through it.

He knew that the hidden thing must have some unknown connection with the stone gate, so he quickly gathered his vitality in his palm and used it in the form of a gold spell. He wanted to forcibly erase the outside wall covering the green light.

As the gravel and stone chips fell downwards, a groove gradually appeared, and Yin Tiancheng saw a handmade disc-shaped object inside.

Just as Yin Tiancheng waved his right hand to continue cleaning, he felt his fingers touching a slightly raised object. He was stunned, and then he heard a "swish" sound, and the disc-shaped object in the groove suddenly popped out.

Yin Tiancheng was shocked and quickly moved his footsteps and retreated to prevent any hidden weapons from shooting out and hurting himself.

But it turned out that he was too cautious. The groove was just a cylindrical stone tube slightly larger than the adult's palm, and it emitted a dark green light all over it.

Yin Tiancheng almost laughed out loud, realizing that this stone tube was the mechanism to open the stone gate, otherwise how could the demons go freely to enter and exit this place!

He hurriedly looked at the stone tube carefully and found that except for the round surface with eight ancient stone characters engraved, there was nothing special about other places.

If there is no error in judgment, these carved ancient characters are likely to be the key factor in opening the stone door.

Fortunately, Yin Tian knew those words in Chengdu. After he recited them silently in his mind, he found that he looked very familiar, as if he had seen them somewhere before.

After thinking about it carefully, Yin Tiancheng couldn't help but scream in surprise. The eight words on the stone tube were actually related to the ancient book given to him by the demon!

Although the ancient book was stolen by Huang Dalei, Yin Tiancheng had already realized that these words were exactly the eight words that Nangong Yan said, because the pages of the ancient book were damaged!

At that time, everyone, including Yin Tiancheng, regarded it as an ancient book that recorded the practice of the mind. The eight missing words were found in other practice books, so no one would think that there were unknown secrets hidden among them.

It was not until this time that Yin Tiancheng understood the good intentions of the demon. The ancient book he gave to him had nothing to do with cultivation, but it hid information about the mirage demon grandson.

As a demon, he could not have the ability to resist Prince Sun, so the demon placed his hope on others.

After Taoist Master Kumu was poisoned, he had been secretly looking for a suitable candidate and finally chose Yin Tiancheng because he believed that this young man would definitely get rid of the cruel Prince Sun and avenge their brothers.

Yin Tiancheng couldn't help but burst into tears, realizing that he could not let down the expectations of the demon, otherwise that hateful mirage demon would kill more practitioners!

When he was studying the eight ancient characters on the stone barrel, Yin Tiancheng accidentally touched one of them with his hand. Then he was surprised to find that these characters were not fixed on the stone barrel as he thought, but could move freely.

Yin Tiancheng was ecstatic. He instantly understood that if these stone characters could be arranged in the correct position on the surface of the stone barrel, the closed stone door would be opened by him.

So he wanted to find out the order of these eight characters. Yin Tiancheng had long known that they were six different characters, because there were two characters repeated, namely Wei and Zai.

Based on this phenomenon, Yin Tiancheng effortlessly arranged the order of the front and back. These words combined together turned out to be a complete sentence: The majestic Kunlun is so magnificent and beautiful!

This surprised Yin Tiancheng. Prince Sun was a cruel old monster. Why did the door opening mechanism he set up was related to the holy land of the gods, Kunlun sacred mountain? Moreover, the meaning revealed in the sentence was obviously to praise this sacred mountain. The abnormal phenomenon did not conform to his identity and cruel personality.

Although he was shocked, Yin Tiancheng was not too entangled with it. Since the order of the characters of stone has been arranged, he could open the stone door by starting with the characters of Wei and ending with the characters of Zai.

This is a bit similar to the principle of the Nine-Class grid, but there are painted squares for people to choose from, but there is no prompt on the surface of the stone barrel.

However, this is not a problem for Yin Tiancheng. The Nine Palaces originated from the Hetu Luoshu, and then Fuxi played the Bagua accordingly. Then this mechanism of opening the door must have hidden the principle of Bagua.

The surface of the stone tube is exactly one word less than the nine-grid grid, which undoubtedly implies that the eight ancient characters represent the direction of the Bagua.

Yin Tiancheng quickly moved the first character Wei to the Zhen position, which is the position in the east, and then moved the other seven characters to the corresponding position in sequence.

After doing all this, Yin Tiancheng stood aside, waited for the stone door to open automatically and went in to see what was going on.

But reality disappointed him. Yin Tiancheng waited for a long time but didn't see any movement, which means he was in the wrong order.

Yin Tiancheng was a little disappointed, but he immediately opened his mind and cursed in his heart: "Oh, I actually made such a low-level mistake!"

Nowadays, people always use the east to honor their directions. However, according to the principle of the Bagua, the directions should be from the north to the south, right west to the east, left to the east, and south to the south. Yin Tiancheng's arrangement order just now started from the east, which is not a good idea!

After thinking it through, Yin Tiancheng took a deep breath and re-arranged the direction of the character "Shi". This time, he moved the character "Wei" to the south. After his hand left the character "Shi", a wonderful phenomenon occurred. The character "Wei" actually became the character "Li" representing the south!

Now Yin Tiancheng's confidence increased and he quickly moved the second character Wei to the southwest. As expected, it turned into the character Kun!

Yin Tiancheng suppressed his excitement and continued to arrange it. After all the characters of stone were moved, they also correspondingly became the eight Bagua fonts representing directions: Li, Kun, Dui, Qian, Kan, Gen, Zhen, and Xun.

But there was still no movement in the stone gate, but Yin Tiancheng no longer had any doubts. After all, there were only eight characters of stone, and the direction of the central palace was still vacant after the arrangement.

Yin Tiancheng moved his arm, then pressed his index finger to the center of the stone tube.

As expected, as he wanted, as soon as his index finger pressed to this position, the stone barrel slowly rotated, and then stopped moving after nine circles.

Then with a "slam" sound, Yin Tiancheng saw the stone door retreating to both sides, and the light shone inside, as if indicating that there was a mysterious world behind the door.

Yin Tiancheng couldn't help but become nervous. He did not rush to go in, but held the Golden Rainbow Sword in his hand and was waiting for him, fearing that it would be the nest of the mirage demon, and that this vicious old demon would rush out at any time to launch a sudden attack on him.

But this situation did not happen after all. Yin Tiancheng felt relieved and protected the sword in front of his chest and walked in.
Chapter completed!