Although this piece of sand and gravel is deep, it is not hard, so it is not too difficult to dig.

Jiang Chen, Zi Xi and Xiaoqian dug for about seven or eight hours and finally dug through the thirty-foot-thick sand and gravel. I saw a blue stone slab here. When you tap it with a sharp weapon, you will make a hollow sound of "bump, bang". There is obviously another space under the stone slab.

When they saw the stone slab, they looked surprised, because the stone slab looked too ordinary, it was blue, just like an ordinary bluestone slab.

Zi Xi then recited the spell, and a moment later, a bone spear two feet long and flashed with white light formed in the sky.

She wanted to use her own bone spear technique to penetrate the stone slab.

"Go!" Zi Xi exclaimed lightly, and saw the white bone spear flying towards the stone slab at an extremely fast speed.

It instantly hit the bluestone slab and made a loud "bang".

"Ah!" She couldn't help but exclaim, and saw that the bone spear broke into bone slag after hitting the bluestone slab, but the bluestone slab was unscathed.

Jiang Chen was also slightly surprised because Zi Xi was a cultivator in the middle stage of the Golden Pill, and in terms of magical powers, she was no less than that of the late stage of the Golden Pill. Her bone spear technique could even penetrate ordinary black iron about a foot thick. If it were ordinary bluestone, it would have become a big hole. It seems that this bluestone slab was indeed a bit strange.

Zi Xi shook her head with a little regret, turned around and said to Jiang Chen, "Junior Brother Jiang, you'd better come on! The attack power of your Heavenly Demon Sword Technique is several times that of ordinary sword Technique. Try it, can you use the Heavenly Demon Sword Technique to break through this stone slab!"

Jiang Chen nodded when he heard this, then stepped forward and then held the soul-breaking sword tightly with both hands, and saw a faint golden light emitted from the tip of the knife. He raised the spiritual power in his body to the extreme, then condensed on the blade, and then shouted loudly. He suddenly waved towards the exposed bluestone slab.

In an instant, a powerful golden wave flew towards the stone slab like a sharp arrow, accompanied by a huge whistle.

"Boom!" After a loud bang, the knife's aura hit the bluestone slab firmly, and a stream of smoke and dust rose from the stone slab.

However, after the smoke and dust dissipated, Jiang Chen was stunned when he saw it, and the bluestone slab was still intact.

Zi Xi was also a little annoyed at this time. She immediately pulled out her Nether Fire Sword, and then a sharp light flashed in her beautiful eyes, and then she used all her strength to slash at the bluestone slab.

A muffled sound of "Bang!" Zi Xi's tiger's mouth shattered, and the Nether Fire Sword flew into the air, and then it took a long time to fall down and penetrated to the ground. Zi Xi's delicate body was forced to retreat several steps by the rebound force.

"Senior Sister Zi! Are you okay?" Jiang Chen rushed to Zi Xi to check if she was injured.

"I'm fine! But the rebound force is a bit strong!" Zi Xi stood up with a carp and patted the stain on her buttocks, and said with a wry smile: "This bluestone slab should be integrated with some high-level materials from the ancient times. It is too strong. It is estimated that only masters in the late stage of the Nascent Soul and even the God-Transforming Stage can use brute force to break it... Alas, it seems that the secret room designed by these ancient monks is indeed extraordinary."

"What should we do now?" Jiang Chen was also a little anxious. For him, it would be best to obtain the inherited skills in this secret room, but it would be fine if he couldn't. He wanted to hatch the eggs of the Nether Phoenix first.

"Well... I can only continue digging. I think this secret room cannot be like an iron box, without even a crack or a door. We dig along the bluestone slab, and I believe we can find the entrance!" Zi Xi said after thinking for a while.

Then she said, "If we can't enter the secret room within a month, then give up. What kind of magic you want to practice, or what kind of elixirs you want to refine, please listen to the emperor. I also have a few magic weapons that I want to use this opportunity to refine them!"

Jiang Chen nodded. If this is the case, it would be impossible.

After the two reached a consensus, the excavation work went much smoother. It took only half a month to finally dig out the door of the secret room.

The wall where the door of this secret room is located is very different from other places. From the appearance, it can be seen that although it is like those bluestone slabs, it is indestructible. There is a hole on it that just can reach into a hand. Above the opening of this hole is a black crystal that is the size of a bowl and is similar to a spirit stone, flashing with a black light.

"Junior Brother Jiang, it seems that this is the entrance! I just don't know how to get in!" Zixi looked at the door, especially after checking the small hole in the door, Fang frowned and said, "There is a red crystal bead in this hole, and I feel like I'm being peeped."

"Oh? Is that right?" After hearing this, Jiang Chen looked at it curiously and saw a red crystal bead inside it. However, his first reaction was that this thing seemed to emit some invisible light and scan the movements outside.

Jiang Chen suddenly remembered the retinal scanner at the entrance to some important facilities in his previous life.

After pondering for a moment, he patted his storage bag, took out the purple gold cauldron, and placed it in front of the hole of the crystal bead.

Sure enough, not long after, a thin red light shot out from the crystal beads and then shone on the purple gold cauldron.

However, after the red light shone for a while, it did not open the door. Instead, a buzzing old man's voice came from the door: "The person holding this tripod is only a disciple of my inner sect of Qingdan Sect. He has no right to enter the sect inheritance to learn martial arts. Please go back!"

After hearing this voice, Jiang Chen was startled at first, but then he was happy. Although he failed to open the door, he knew that his method was not wrong. He could not enter this secret room because the purple gold cauldron he held was only a symbol of the identity of the inner disciple and lacked authority.

So he turned around and said to Zi Xi beside him: "Sister Zi, please try the core objects of Qingdan Sect you carry. I think as a descendant of Qingdan Sect disciples in ancient times, the identity items passed down by your ancestors should be able to enter the secret room!"

Zi Xi had already noticed Jiang Chen's actions, and after hearing what he said, he nodded.

Then, she took out a jade pendant with three green runes carved from her arms of the "Qingdan Gate" with flying dragons and phoenixes, and placed it in front of the crystal beads.

She had just put the jade pendant down, and a thin red light shot on the crystal beads, and then the door began to make a "squeak, squeak" sound.

"Hold the jade pendant of the core disciple of Qingdan Sect, and the secret room has not been opened for more than a thousand years. It meets the conditions for entering the inheritance secret room and accepting inheritance skills, and is allowed to enter!" The old voice sounded again.

"Finally it worked!" Zi Xi and Jiang Chen were both a little ecstatic.

With a "pang", the door of the secret room that had been buried by sand and stone for thousands of years was finally opened. However, what surprised Zixi and Jiang Chen was that there was still a transparent wall blocking at the door, which prevented them from entering it.

"According to the rules of my Qingdan Sect, the inheritance secret room can only be entered by one inheritance disciple and accepted inheritance. At the same time, the disciple will also become the next candidate for the head of Qingdan Sect and focus on training. Therefore, only one of you two can enter!" The old man said in a faint voice.

"Since that's the case, then Senior Sister Zi, please go in! Anyway, I'm not very interested in the Qingdan Sect's martial arts!" Jiang Chen said lightly.

After hearing this, Zixi frowned and said, "Is there no way for two people to accept inheritance at the same time? One more person can better revitalize and develop sects!"

"Haha! It's not impossible for two people to accept the inheritance together, but the two must be one man and one woman, and they can only accept the same inheritance technique, and they cannot learn one. Are you two willing?" The old man's hearty laughter came from the door.

"Yes! We do!" Zi Xi was overjoyed when she heard this. She always felt that Jiang Chen had helped her so much, but she made him look at it at the door, which was really a bit disgusting. Although she didn't know whether this old man was a puppet or a wisp of soul left in ancient times, she must have been the head of Qingdan Sect or the elders and other senior officials of the Qingdan Sect, so what she said would naturally be.

After hearing this, Jiang Chen was very happy. Although he did not have much hope for obtaining the inherited martial arts of Qingdan Sect, he would not refuse if he had the opportunity to learn one more martial arts. Especially this kind of inherited martial arts used by ancient sects to cultivate the heirs of the leader, no matter how bad it is, it will not be much worse.

"You little girl is willing, but what about that young man?" the old man asked again.

Zixi and Jiang Chen couldn't help laughing when they heard their names. However, in the era of Qingdan Sect, it would be reasonable for the old man to call them what kind of girls or boys they were.

"I do it too!" Jiang Chen had no choice but to express his attitude.

"Okay! Since you all hold the core objects of my Qingdan disciples and are in love with each other, I will make an exception and allow you to enter the secret room together and accept the inherited martial arts!" the old man said in a serious voice.

After saying that, with a "puff" sound, the transparent curtain cover that was originally at the door of the secret room disappeared, revealing an empty room.

"Let's go in!" Zi Xi took Jiang Chen's hand at this time, and the two rushed into the legendary secret room together.

Shortly after the two of them entered, the door to the secret room was closed again.
Chapter completed!