To be the best leader, you must also be the strongest leader!

The demon kings exchanged glances with each other for a while, each with an embarrassed expression. If the demon tribe's inventory was still there, they would be able to afford some of the expenses of using the training space.

However, after this defeat, the Qingyun Sect had to empty the treasure house. If they wanted to use the training space next time, they would need to raise more money.

To cultivate from the early stage of the fourth level to the peak of the fourth level, a full 260 billion spirit stones are needed. Even these demon kings are at a loss when they see this number.

"Master Sun, we really can't afford so many spirit stones!" The Mermaid King looked at Sun Yi with a bitter expression.

Sun Yi smiled and said, "If there are not enough spirit stones, you senior demon kings can use other treasures as a substitute."

"We will purchase all kinds of spiritual minerals, spiritual medicines, demon inner elixirs, demon blood essence, and various demon materials at high prices. We promise to cooperate only with the demon king seniors present here for the time being, and will not cooperate with other demon tribes for the time being."

"For various resources, our sect will invite professional appraisers to evaluate them and guarantee to give you the most reasonable price."

"In addition to exchanging resources with our sect, you seniors can also sell us information. As long as it's useful information, the price will not be unfair to you."

"For example, if any of you seniors can find accurate information about the human race outside of the Tianyuan Continent, you can directly use the cultivation space to reach the peak of the fourth level for free."

The eyes of the twenty-eight demon kings present lit up.

"Master Sun, are you serious?"

"It's absolutely true. If any of you seniors can find out the news first and tell our sect immediately, you can directly use the cultivation space." Sun Yi answered without hesitation.

For a moment, the eyes of the demon kings opposite flashed with brilliance, and their hearts were burning with excitement.

"Also, isn't our sect planning to establish a spirit stone production line in the territories of the seniors? 20% of the output is quite a lot."

"If you seniors build enough spirit stone production lines in your territories, we might be able to raise enough money to use the cultivation space soon."

"Our sect can even send special personnel to the territories of the seniors to help them develop their territories and plant various spiritual herbs. Then, the seniors can sell all the spiritual herbs they planted to our sect, which will bring in a large amount of income."

"At the same time, our sect also has many elixirs and magical medicines that are very helpful to the tribes of the Demon King Seniors. We can even sell them in large quantities to the Demon King Seniors."

"With the strong support of our sect, your race will definitely be able to develop rapidly. It is not impossible for them to surpass the Dragon Turtle Clan and even the Red Dragon Clan in the future."

"Master Sun, does your sect really have any elixirs that are useful to our clan? Are you willing to sell them to our clan in large quantities?" The Mermaid King looked at Sun Yi with anticipation.

Sun Yi smiled and said nothing more. With a wave of his right hand, a jade bottle appeared in front of him. Then, elixirs flew out of the jade bottle and flew in front of these demon kings.

The eyes of these demon kings were attracted by the elixir in front of them.

"Huh, it actually possesses such pure demonic energy!" The Mermaid King took the third-level elixir in front of him and observed it carefully, and the other demon kings did the same.

Soon they discovered that this elixir contained pure demonic energy.

The human race's elixir actually contained pure demonic energy, which made them a little confused.

"Seniors, you can try the effects of these elixirs." Sun Yi smiled and raised his hand to gesture.

The Mermaid King quickly put the elixir into his mouth without any hesitation. After all, if Qingyun Sect wanted to deal with them, they would not need to poison them.

The other demon kings also swallowed the elixir in their hands in one gulp, then closed their eyes and slowly felt the changes taking place in their bodies.

After a long while, the Mermaid King suddenly opened his eyes, two rays of light flashed in his eyes, and he couldn't help showing a shocked expression on his face.

"Okay, this elixir is indeed very useful for my demon race!"

"I never thought your family would possess such an elixir that would be of great use to my demon clan!"

"Master Sun, can your sect really provide us with these elixirs in large quantities?"

"This elixir seems to be tailor-made for our demon clan. If our clan has a large number of these elixirs, our strength will definitely increase quickly!"

After tasting the effects of this elixir, all the demon kings present were eager for it, especially the four clan leaders, who knew very well how useful this elixir was to their clan.

Seeing the shocked expressions of these demon kings, Sun Yi sighed inwardly that this elixir jointly developed by the Spirit Beast Hall and the Alchemy Hall would probably make a fortune in the future.

This sect specializes in developing elixirs for spirit beasts. The raw materials used are the flesh and blood of demons, as well as the pure demonic energy extracted from the Demon Refining Tower and the Demon Refining Pot.

In the recent war, Qingyun Sect obtained countless monsters. There are too many raw materials for this kind of elixir, and the inventory of elixir is piled up. The Spirit Beast Hall cannot consume it all. Even if it is used for foreign trade, it cannot be consumed. It is a good idea to open up sales to the monster tribe.

"Senior Demon Kings, don't you want to quickly earn spirit stones to use in your cultivation space? I can offer you an idea."

"Master Sun, what solutions do you have?" These demon kings all looked at Sun Yi.

"Seniors, you can purchase these elixirs from our sect and then sell them to other demon tribes at a markup. As for how much to markup, you can decide for yourself. I believe there is a huge market for these elixirs among the demon tribe. You demon kings can earn a lot of spirit stones just from these elixirs."

When these demon kings heard Sun Yi's suggestion, their eyes suddenly lit up. This was indeed a good way to earn spirit stones. There were countless demons in the Endless Sea. Such an effective elixir would definitely cause a scramble, and they would definitely be able to earn a lot of spirit stones.

"It's indeed a good idea. Can your family really provide our clan with this elixir in large quantities in the future?" The Mermaid King looked at Sun Yi with a fiery expression.

The other demon kings present also stared at Sun Yi with fiery eyes.

"Of course, our sect will do its best to provide this elixir to you seniors. In the future, you seniors will understand that cooperating with our sect is a very pleasant thing."

"I have listed a resource price comparison list here. You seniors can take it back for reference. We will accept all the resources listed here, no matter how much."

As Sun Yi spoke, he took out some jade slips and placed them in front of these demon kings.

This jade slip records the prices of the essence and blood of fourth-level demons, demon pills, various demon beast materials, and various spiritual minerals and spiritual medicines collected by Qingyun Sect.

Seeing the price recorded in the jade slip, the eyes of these demon kings became fiery, with a dangerous light faintly glimmering in their pupils. Looking at their expressions, Sun Yi knew that the Endless Sea was about to set off a bloody storm, which was exactly the result Sun Yi wanted to see.