However, the Underground King also knew that Lin Yun's strength was not considered strong in his eyes, so he did not take Lin Yun seriously.
The purple-winged mad demon obviously didn't want to get entangled in Lin Yun's matter, and continued: "The current five holy places are the obstacles for you to attack the divine domain and regain your homeland."
"The Five Holy Lands cannot tolerate our existence, so they are also our enemies."
"As the saying goes, the enemy of my enemy is my friend."
At this point, the Underground King finally understood the purpose of the purple-winged madman's coming. He snorted coldly and said, "Do you want to use these blood crystals to join forces with me to fight against the five holy places?"
The purple-winged crazy demon said: "Yes, I have prepared a map. The Underground King can dig a passage from the underground world to the main city of Xijie."
"The relationship between Heaven and Xijie is very close. If we go directly to Xijie's territory and launch an attack, the army of Heaven will not have time to support us."
"When the time comes, members of our tomb will also be dispatched to join forces with you to destroy Xijie together!"
After the Purple Wing Crazy Devil finished speaking, the Underground King found some loopholes in it, but there was still excitement on his face that could not be concealed.
During this period of time, he was thinking about how to take revenge and kill Fairy Zixia with his own hands.
"You just said that the Samsara Emperor in the heavens has a close relationship with the Xi Yao Empress, so how can you ensure that the Samsara Emperor will not come?"
This is what the Underground King is most worried about. He is not even a match for Fairy Zixia. If the two Martial Emperors join forces, he may not even have a chance to escape.
"Please rest assured that the Heaven Realm is affected by the underworld, the Holy Alliance, and the Fallen Heaven Legion, and they dare not act rashly."
"If the Emperor of Samsara takes action, we will not sit idly by at the necessary moment."
The Purple Wing Crazy Demon said very firmly, with a serious look on his face, which gave the Underground King some trust in his heart.
"Is there anyone in your tomb who can fight against the Samsara Heavenly Emperor, the strongest Martial Emperor?" The Underground King looked at the Purple Wing Crazy Demon with a suspicious look on his face, somewhat unbelievable.
"Don't worry." The purple-winged madman took out a map from the storage ring, which marked the location of Xijie in detail.
The Underground King was still a little hesitant. At this time, Yuejun hurriedly flew into the palace, glanced at the purple-winged crazy devil, and was about to speak. The Underground King coughed lightly. Yuejun also understood and came to the Underground King.
By his side, he was reporting in his ear.
"Your Majesty, the effect is very significant. Not only have the soldiers' strength improved a lot, but they are not afraid of pain and have become more violent. The most important thing is that these blood crystals can prevent the soldiers from conflicting with the fairy energy on the ground!
"
The Underground King's eyes widened in surprise. This last point is the most important.
For so many years, why have the underground people in the underground world never dared to attack the surface world?
It is because over the years, the underground people have completely adapted to the energy of the earth's core, which is equivalent to the oxygen in the underground world. The underground people need to rely on the energy of the earth's core to survive.
The fairy energy on the ground is oxygen to humans, but to people underground, it can be said to be deadly poisonous gas. Just like water is oxygen to aquatic creatures, but to land creatures, it is oxygen.
Something that could drown them.
However, the underground people who have been fused with the "Demon Blood Crystal" can perfectly absorb both earth core energy and fairy energy. This means that these underground people will not feel uncomfortable even if they go to the surface.
The Underground King already has a plan in mind and wants to join forces with "Tomb".
If the tomb can continuously provide them with "demon blood crystals", then the soldiers of the underground world will become more and more powerful.
"If you want to form an alliance with us, I also need to make a three-part agreement with you first." The Underground King pretended to be profound and looked at the purple-winged madman.
"Please tell me." Ziyi Crazy Devil sneered in his heart, why didn't he know that the Underground King is now eager to join forces with them.
"First, we must continue to provide us with demon blood crystals in the future, and the number each time must not be less than five million."
"Second, after the Xi Realm is annihilated, the Xi Yao Empress must be dealt with by me personally!"
"Third, after taking back the God's Domain, the Eastern Continent belongs to the Underworld, and the Western Continent belongs to the Tomb."
The Purple Wing Crazy Devil was laughing loudly in his heart, laughing at the Underground King's naivety and his overestimation of his abilities.
A mere underground world dares to negotiate conditions with the tomb, and even brazenly talks about it. It is extremely stupid to think that it can fight against the Five Holy Lands.
Purple Wing Crazy Demon remained calm on the surface and responded: "Of course, we agreed to all three conditions."
After saying that, the purple-winged crazy demon took out a transmission talisman and handed it to Yue Jun, saying: "This is the "transmission talisman". After seven days, you can attack Xijie with confidence. After the Xi Yao Empress appears,
Contact me using telephony."
"I will lead the members of the tomb to attack you from the rear, both inside and outside, and together we will annihilate Xi Jie!"
The negotiation ended here, and the purple-winged crazy demon's clone directly sneaked into the underground until it disappeared into the underground world.
"Your Majesty, can this person's words be trusted?" Yue Jun asked cautiously. He always felt that there was fraud in it.
The Underground King sneered and said coldly: "Even you can see that I can't believe it. Do you think I will believe it?"
"Then let's take this box of demon blood crystals away and not attack Xijie?" Yuejun asked curiously.
The Underground King shook his head, his eyes shining brightly, and said: "No, let me know, and immediately dig a passage to the Xijie."
"But remember, after I join forces with the people in Tomb, once I kill Empress Xi Yao, you will immediately lead an army to kill all the members of Tomb!"
"This group of people is not simple. They can take these things from the Demon Realm. There are definitely other treasures."
"It's too immature to want to share the divine domain equally with me. We will eventually take back all the world that belongs to us underground people!"
The Underground King's idea was very beautiful, but he didn't know that the purple-winged crazy devil was about to faint from laughter.
The Purple Wing Crazy Devil never expected that an old monster that had lived for so long would not have any palace at all.
In just a few words, the purple-winged mad demon penetrated all of the Underground King's thoughts.
Now in Tomb's sub-base, Ziyi Crazy also took out the transmission talisman and contacted another member of Tomb, asking him to come to the sub-base immediately and assign him a task.
The Purple Winged Crazy Demon looked at the statue of the Demon King with an extremely pious expression.
"The time is getting closer and closer. Ziyi has lived for this purpose in his life. This is the meaning of my survival..."