A hundred zhang was not considered deep for Su Yu.
In the time it takes for half an incense to burn, Su Yu had successfully dug to the top of the secret underground chamber.
A multicolored light screen appeared beneath Su Yu's feet like a silkworm cocoon.
Through the light barrier, he could clearly see that the sealed secret underground chamber was not very spacious, only ten square meters in size.
There was only a stone bed and a stone table inside.
There was no one on the stone bed, but on the stone table was a greenish-yellow jade seal.
The jade seal was engraved with a realistic dragon-shaped image, mighty and domineering.
Most of the other items on the table had lost their splendor. Only the jade seal was surrounded by a layer of five-colored lightning that was hard to detect with the naked eye. Hence, it was as bright as ever, with no signs of age.
Su Yu's heart was thumping wildly. This was definitely a special treasure!
Separated by a barrier, Su Yu was unable to determine the item's grade and value. But based on his intuition, the jade seal could be the most important item in the entire palace!
This made his heart pound.
Holding his breath, Su Yu realized that there were nine books on the bracelet. Although they were covered in dust, they had not decayed.
Su Yu was also slightly moved.
He hurriedly examined the light barrier, realizing that it had a strong defense, blocking out all the pressure from the outside world.
If that wasn't the case, just the 300-meter-thick ground alone would be enough to crush the secret chamber over countless years.
Su Yu thought for a moment, then tried to take out the Golden Scale Dagger to see if he could carve a hole in the barrier.
But when the sharp tip of the Golden Scale Dagger struck the surface, it was as if it had struck steel. Sparks flew everywhere, unable to break the barrier.
Then, Su Yu tried the Nine Yin Yang Formation.
But it still did not budge the light barrier.
This made Su Yu laugh bitterly, as if he had celebrated too early.
But this did not mean that Su Yu was helpless.
With a thought, Su Yu sat down cross-legged, his hands forming seals. A transparent shadow appeared above his head. It was Su Yu's soul, which suddenly left his body.
His soul had left his body!
If this light barrier could block the physical world, how powerful would it be on the soul world?
After thinking for a moment, Su Yu's Soul Body's feet sank downwards. It was as if there was no one around, and he easily entered the light screen, entering the secret room without any obstruction!
This made Su Yu happy. It was actually so easy!
Without saying another word, Su Yu immediately went to the front of the stone table. As he stared at the jade seal, he tried to grab it with his palm. However, Su Yu's soul body almost passed through the jade seal, and he was unable to touch it.
Su Yu blushed with shame. He still had a long way to go if he wanted to achieve what Yun Yazi had done, using a soul body to unleash physical attacks.
If that was the case, he could only lament his inadequacy. He was in the treasury, but he had to return empty-handed?
With unwillingness, Su Yu examined the nine books.
They were casually placed on the table. Although they were all sealed, the Soul Eye was able to see through their contents without any obstruction.
"Oh? They are all comprehensions of the Lightning Dao! " Su Yu was slightly surprised. He had thought that it might be a cultivation technique left behind by the Thunder Emperor, but in reality, it was a few rounds of comprehension. It was very likely that it was the comprehension of the Thunder Emperor himself!
After thinking for a while, Su Yu started to read the book attentively.
At first, he did not care. However, as he read deeper, Su Yu became more and more shocked, and more and more ecstatic!
Of these nine books, the first one was an explanation of the lightning dao, the second was an introduction to the lightning dao, the third had the cultivation experience of the lightning monarch, the fourth, fifth, sixth, and seventh books, a total of three books, were all about the lightning dao god art that the lightning monarch cultivated!!
This was almost equivalent to a legacy!
How could Su Yu not be excited?
The eighth book was an introduction to the materials of the Lightning Dao. There were elixirs, materials for crafting artifacts, and many other supplementary materials. There was a wide variety of materials, almost covering the knowledge of the materials of the Jiuzhou continent.
Su Yu finished reading patiently, and finally read the last book.
This book was an introduction to the item that Su Yu was most interested in, the jade seal!
"This jade seal is a beginner's creation. It is still three stages away from the real Five Elemental Strong Thunder Seal. At the moment, it is only a semi-manufactured spiritual artifact. If the treasure is completely refined, it might surpass a spiritual artifact! It will become a fairy artifact recorded in the ancient books to shock Jiuzhou. "
Fairy artifact? Su Yu was shocked. What level was a fairy artifact?
What shocked Su Yu even more was that this jade seal was only a beginner's creation!
If he wanted to succeed, he still had to go through three more stages.
From what Su Yu knew, the first stage of crafting treasures referred to the fusion of various materials.
Could this treasure, which was comparable to a semi-manufactured spiritual artifact, only be the fusion of materials?
If just the fusion of the materials had such frightening power, wouldn't it be exceptionally frightening if the crafting was successful?
Su Yu gasped. Even the Eternal Stone King Armor, a high grade spiritual artifact, was not as shocking as this!
He realized that the value of this item was far beyond his imagination!
Su Yu's breathing was rapid. He had to get his hands on this item!
But he could not break the protective barrier. How could he bring this item away?
Thump —
At this moment, a rumble could be heard from the surroundings of the secret chamber. At the side of the light screen, the shadow of a door could be faintly seen.
That was the door to the secret chamber!
At this moment, someone was breaking open the door from the outside. A crack had already opened.
Looking through the crack, Su Yu could not help but be shocked!
Gang Dalei!
In an instant, Su Yu understood that finding the Thunder Herb was only one of the reasons. Finding the legacy of the Thunder Emperor was the sloppy old man's ultimate goal.
Su Yu was secretly anxious. If Gang Dalei were to enter, the prototype fairy artifact would be taken away by Gang Dalei!
But at this moment, Su Yu's mind suddenly heated up.
A majestic voice reverberated in the depths of his mind like thunder.
"Congratulations on reading all nine of my books and inheriting my legacy!"
Su Yu was stunned. There was still a shred of the Thunder Emperor's remnant consciousness in this place?
"This prototype fairy artifact will be given to you as part of the legacy. I hope that the future generations can fulfill my dying wish and continue crafting it."
After saying this, a puffing sound came from his mind. An unfamiliar incantation had appeared.
That incantation was a seal used to control the Five Elemental Strong Thunder Seal.
Thump, thump —
The door to the secret chamber once again let out a banging sound. Without further ado, Su Yu hurriedly recited the incantation.
At that moment, Su Yu felt a faint connection between himself and the Five Elemental Strong Thunder Seal. With a thought, the surface of the jade seal crackled and floated in the air.
Su Yu was overjoyed. Under his secret control, the jade seal quickly flew toward Su Yu's physical body.
What made Su Yu even more surprised was that the light screen could not stop the jade seal. It passed through the light screen and successfully appeared in front of Su Yu's physical body.
This made Su Yu extremely excited. His soul body also left and returned to his physical body.
As soon as Su Yu opened his eyes, the Cosmos Mirror in his bosom flickered with a dim light, and he was about to store the treasure in it.
But surprisingly, the item did not budge, as if it could not be stored within the Cosmos Mirror.
Thinking for a moment, Su Yu had a thought. The mark of the Nine Jade Spiritual Pearl on his arm flashed. The prototype fairy artifact was then stored within the Nine Jade Spiritual Pearl with a flash of lightning.
Only then did Su Yu relax.
Thump —
With a loud noise, the door to the secret chamber finally opened!
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