The black sound waves spread out from the black basin like gentle ripples. Wherever the sound wave passes, all the spirit beasts instantly turned into thick white bones, and even a little blood on the bones did not exist.

Mu Chen and the others were all staring at the scene in front of them in a daze, and then their hearts felt a little scared. This scene was really too strange.

Whoosh.

The spirit beasts turned into white bones, but there were vigorous lights gushing out from their bodies, and finally turned into thousands of light rainbows, whistling across the sky, and rushing towards the mysterious black eggs above the crater.

Buzz.

Faced with these light rainbows containing powerful spiritual power, the mysterious black egg also burst out with black light, and then swallowed all the light rainbows like a bottomless pit.

Rainbows of light rose continuously from the bodies of those spirit beasts, but under the splendor, they gave all their vitality.

And what makes people feel most creepy is that these spirit beasts watched this terrifying scene appear, but they were not at all panic. Instead, there was a little fanaticism in their scarlet pupils. That feeling was like this moth-flying to the flames, which made them feel extremely glorious.

This strange contrast made Mu Chen's heart cold. Then he glanced at the mysterious black eggs in the sky that were constantly absorbing light rainbows. These methods far exceeded the wisdom that Mu Chen had in the past and were even more cunning and ruthless than humans.

"That black egg should be transformed by the Jiuyou Bird..." Mu Feng looked solemn and looked at the black egg in the sky that absorbed many light rainbows in fear.

"This spiritual beast from Black Nether Abyss seems to be providing a lot of spiritual power to the Jiuyou Bird..." Mu Chen said softly.

Mu Feng nodded and said, "And this kind of scene has probably not been the first time that this kind of scene has appeared. Over the years, there may be countless spiritual beasts in this Black Nether Abyss here turning into bones, providing all the spiritual power to the Nine Nether Birds."

"This spiritual beast in Black Nether Abyss..." Mu Feng looked a little strange and said, "It was like the one raised by the Jiuyou Birds. He let them grow. After they were a little fat, they slaughtered them and extracted their spiritual power."

Duan Wei and others on the side shuddered when they heard this. They would not be too surprised if humans did this, but the layout of all this was just a spirit beast, although this spirit beast was quite powerful.

"And... maybe, the kind of copper piece we obtained was intentional. It used these to attract some greedy humans, and then took away the spiritual power in our bodies." Mu Feng smiled bitterly and said, "This time, maybe it's just that we are not valued by it, otherwise, I feel that our fate will not be better than those spirit beasts."

Zhou Ye's face was also a little pale. If all this was designed by the Jiuyou Bird, it would be a little scary...

Mu Chen also sighed. He knew that what his father said was most true. I think over the years, due to greed, the human beings who finally came here but could never get out again should not be in a few. Just like the skeleton he met in the Black Underworld Abyss. The skeleton was lucky enough to escape during his lifetime, but eventually died of severe injuries.

"What should I do now?" Duan Wei and his team wiped away the cold sweat from their foreheads. This was the first time they had encountered such a terrifying spirit beast. This terribleness was not only about strength, but also about cunning and ruthlessness that was even greater than that of humans.

"retreat!"

There was no hesitation in Mu Feng's voice: "Don't think about Jiuyou Bird. No one in the Northern Spirit Realm can conquer this existence. While its attention is now on those spirit beasts, we will retreat immediately!"

"yes!"

Duan Wei and the others were relieved when they heard this. There was no hope in this strange situation, so it was wise to leave as soon as possible.

Mu Feng obviously made up his mind to stop coveting the Jiuyou Bird. After giving the order, he waved his hand and a wave of people quietly rushed up the mountain rocks and carefully headed out of the black basin.

"Brother, the people from Muyu are going to retreat!" The movements on their side were also noticed by Liu Yu, and Liu Ming said hurriedly.

"Don't worry about them!" Liu Qingtian said coldly: "This is wrong. We will be more at ease after they leave, so as not to be alert to them."

"Then we..." Liu Ming hesitated for a moment. In fact, he was also feeling irritated by the scene in front of him. The mysterious black egg was too strange. The intuition told them that it was a wise choice to leave from a distance.

"Wait a little longer!"

There was obviously a look of struggle in Liu Qingtian's eyes, but in the end he gritted his teeth and said, the temptation of Jiuyou Bird is too great. If he could get it, even if it was just a slight chance, once he got it, he would become the lord of the Northern Spirit Realm!

Liu Ming and Liu Zong looked at each other and nodded. They had been preparing for this plan for so long, and if they just left like this, they would be a little unwilling to accept it.

While the Muyu people retreated quietly and the Liuyu people were still unwilling to give up, the thousands of spiritual beasts in the black basin also turned into thick white bones under the spread of black sound waves.

call.

In the sky, countless rainbow lights roared, and finally they were all sucked into the suspended mysterious black egg. When the last rainbow disappeared, the world seemed to have become extremely quiet at this time.

Click.

In the silence, a slight crack sounded suddenly. The sound was not loud, but it made the Liuyu people and the retreating Muyu people and the retreating Muyu people feel as if they were struck by lightning. Then their eyes looked at the mysterious black egg in horror, and they saw that there were actually slight cracks on the surface of the black egg.

Cracked appeared, black flames surged out one after another, and finally wrapped the mysterious black egg in it. The strange black flames rose, and the spiritual power between the world seemed to be a little boiling sign.

"That's..." Mu Feng's cold sweat slowly slid down his face, and his voice became hoarse: "It seems that Jiuyou Bird is coming out."

Trepidation!

And just as his words fell, a clear sound that resounded through the world suddenly spread out from the black egg, and the black flames swept across the sky like a storm.

On the black bald egg, cracks became increasingly dense, and finally burst out in a crisp sound.

The black flames became more and more violent, and then Mu Chen and the others were shocked to see that a black wing that seemed to be able to cover the mountain stretched out from the surging black flames.

The black flames were burning in the sky. Mu Chen and his friends could vaguely see through the black flames. In the surging flames, a huge shadow was stretching her huge body gracefully. That scene was like an immortal bird born in Nirvana.

A terrifying spiritual power also spread out at this time, making the spiritual energy between heaven and earth boil.

"Is that the Jiuyou Bird?"

Mu Chen looked at the huge creature stretching gracefully in the surging black flames. Although he could not see clearly, the blurry outline was already amazing.

“This fluctuation…”

Mu Feng also stared at the vague huge body, and then swallowed. This level of spiritual power pressure would probably not be able to match even some powerful people who have entered the three-day realm!

They actually wanted to subdue such existence, which was really a big deal.

"Go away!"

Mu Feng took a deep breath, completely restrained his saliva in his heart, shouted softly, and prepared to evacuate without hesitation.

Rumble!

However, just as Mu Feng urged the race to retreat, there was a sudden thunder sound in the sky. When they looked up, they were stunned. They saw that black thunder clouds suddenly gathered above the black flames. In the black clouds, there were vague thunderstorms like black dragons, surging quietly.

A destructive power emanated from the black thunder clouds.

"Is this...Black God Thunder Cloud?"

Mu Feng looked at the black thunder cloud, his pupils instantly tightened, suppressing the horrified voice, and couldn't help but hear it from his mouth.

"Black God Thunder Cloud?" Mu Chen was stunned.

Mu Feng took a deep breath, suppressed the shock in his heart, and murmured: "This Jiuyou Bird... is not giving up yet, it still wants to try to evolve!"

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Chapter completed!