When the white-haired old shopkeeper heard this, a look of horror immediately appeared on his face.
After all, he is a businessman. In his early years, he traveled all over the country. Now he has lived a long life and is knowledgeable.
Although he had never seen it before, he knew that there was a world of difference between the Wu Earth Crystal Core and the Wu Earth Crystal Source.
Ordinary Wu Earth crystals are already very rare. The Wu Earth spiritual energy they contain is a very good treasure for earth-attribute cultivators, and can repair old injuries.
The Wu Earth Crystal Core is even more precious, and it has a certain chance of increasing the level of the earth attribute spiritual root.
The so-called Wu Earth crystal core refers to the most core batch of ores in the Wu Earth mine.
It is the treasure that almost all earth-attribute cultivators dream of.
However, the Wu Earth Crystal Source is even more precious than the former. As long as the Wu Earth Crystal Source is used properly, it can cultivate a new Wu Earth mineral deposit.
Of course it takes longer.
The Wu Earth source energy contained in it can transform ordinary spiritual soil into Wu Earth crystals or even Wu Earth crystal cores.
You can imagine how precious its value is.
The old shopkeeper's mind raced, and he quickly said with a smile, "Master Cheng, these two little gadgets are for you."
"If Master Cheng is willing to sell this Wu Earth Crystal Source, our Treasure Pavilion will accept it, and we will never let you suffer any loss."
Zi Lianyi directly took out three thousand spirit stones, placed them on the table, and said, "Thank you for your hard work, old shopkeeper."
"We still have a use for this crystal source, so please keep it a secret for us."
After saying that, she pulled Cheng Yun away.
On the way back to Ziyun College.
Zi Lianyi briefly told Cheng Yun about the situation of the Wu Earth Crystal Source, which surprised Cheng Yun, but he was secretly happy in his heart that his guess was true.
"It seems that things from the immortal world are extremely rare in the world of immortal cultivation."
'This will also become my biggest bargaining chip in the underworld.'
Zi Lianyi continued her gentle reminder: "The value of the Wu Earth Crystal Source is enough to shock even the best sects."
"From now on, you must never show yourself to others easily."
"Now, we can only trust the reputation of the Treasure Pavilion and won't tell anyone, but we still have to be careful and vigilant."
Cheng Yun nodded: "Sorry, I don't know much about prices."
This is consistent with his character as he just came down the mountain.
Afterwards, Zi Lianyi began to briefly talk about the prices of various items.
Soon the two returned to the academy.
"Okay, I'm going to retreat for a while."
Zi Lianyi took out a storage bracelet and handed it to him, saying, "There are 30,000 spirit stones in it. I saved them myself. Take it and use it."
Cheng Yun was a little surprised and reached out to take the storage bracelet: "Is this the soft rice of a rich woman? It smells so good!"
Zi Lianyi couldn't help but roll her eyes.
Then he returned to the courtyard next to Zi Lianyi, which was the courtyard he was assigned to.
After arriving at the training room and placing enough spirit stones, he used his newly acquired identity token to unlock all restrictions.
Cheng Yun gave the order as soon as he thought of it, and the blue halo appeared in front of him again. He stepped in and successfully returned to the fairyland.
Qianfeng Mineral Vein, Ninth Mining Area.
Steward's house.
Cheng Yun could clearly feel the existence of the blue crystal ball in his mind.
Through the cyan crystal ball, one can also clearly sense the 'star' emitting a cyan halo.
"It seems that I can indeed travel between the two worlds at will."
Thinking of this, Cheng Yun's eyes brightened a lot.
"From what we know so far, items from the Immortal Realm are extremely rare and valuable in the Lower Realm."
"But here in the lower realm, the different cultivation methods may also allow me to gain a foothold in the dangerous immortal world, and even become a bargaining chip and capital for my rise."
"Of course, the Immortal Realm is still the main focus, with the Lower Realm as a supplement."
"After all, the resources in the fairy world are rich and can help me achieve greater success."
"And in the lower realm, the ultimate goal of cultivation is to ascend to the immortal realm."
…
Afterwards, Cheng Yun further analyzed the two different cultivation systems and combat power.
From the current perspective, Cheng Yun, when he is at the tenth level of the Body Refining Realm, is enough to defeat Zi Lianyi, who is at the peak of the Yuan Hua Realm.
At this time, he had already reached the peak of the fourth level of the Golden Body Realm, and could easily defeat an early stage Divine Hidden Realm opponent.
If he could get close, even if the opponent had a higher level of cultivation, Cheng Yun would be confident that he could defeat him.
After pondering for a while, Cheng Yun made a judgment: "If I use the power of the Immortal Vein, I should be able to defeat the Starlight Realm without the other party knowing."
…
After Cheng Yun pondered for a long time, he left the steward's room and asked the patrolling guard, "How many days have I been in seclusion?"
"Sir, you have been in seclusion for six days."
"Is there anyone looking for me?"
"No."
"You guys keep busy."
Cheng Yun nodded and walked deeper into the mine.
"It seems that the flow rate of time in the upper and lower realms should be one to one."
Half an hour later, Cheng Yun went hundreds of feet underground and arrived at Mine No. 99 where he had previously discovered the blue crystal ball that could travel between the two worlds.
What surprised Cheng Yun was that the dark and thin centurion was actually waiting here.
When the centurion saw Cheng Yun, he quickly stepped forward to greet him: "Manager, you are here."
"Have you been guarding here all this time?"
The centurion bowed and nodded, saying, "After work, we'll stay here to guard. It's a good place to rest anyway."
"I'm just afraid someone will mess up the important matter."
Cheng Yun nodded: "Well done."
"You continue to guard, I'll go in and take a look first."
It was obvious that the other party intended to use him as a backer.
However, Cheng Yun had no intention of staying here for a long time, so he just took it one step at a time.
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