Soon, the group of five crossed the front hall and entered the middle hall.

There seemed to be no corpse puppet in the middle hall and the place was divided into two regions. On the left, the void space seemed to be distorted from the scorching heat of the Death Valley Flame. On the right was a frosty world filled with Eternal Night Frost. One could constantly hear the howling of the cold wave tornado, freezing the void space and causing it to collapse.

"The middle hall is guarded by two elite immortal kernels?"

Wu Yu and Wu Jun exchanged a glance and could see the suspicions in the eyes of the other.

This was because they could sense the two sources of energy in the middle hall, regardless if it was the Death Valley Flame or the Eternal Night Frost, were slightly weaker than those they had seen outside previously. In fact, they could even withstand them at their current strength as they attempt to cross the middle hall.

If this was the challenge for the middle hall, this would be easier to deal with than the corpse puppet of Violet-Eyed Emperor.

"It's likely not that simple. Let's head out first but keep an eye on the surroundings at all time,"said Wu Yu as he prepared to get through the Death Valley Flame.

For Wu Yu, the threat of the Eternal Night Frost was greater. Therefore, he had chosen to move ahead through the Death Valley Flame.

As for the three demonic emperors, Wu Yu discussed with them and decided they should be be crossing through the Eternal Night Frost. They would also have to ensure they weren't too far apart. If any accident occured, they could still help out one another.

Although they were in loggerheads and their cooperation was just temporary, they had to help out the other at the critical junctures.

After all, considering the circumstances, the other party wouldn't survive if anyone die. All five of them recognize the fact well.

The three demonic emperors worked together and entered the region of Eternal Night Frost, each casting their own techniques and tricks to resist the violent cold waves that were even capable of freezing void space.

As for Wu Yu and Wu Jun, they entered the region of Death Valley Flame while resisting the Death Valley Flame that could even torch the void space. The flames carried chaos energy that was born together with the world and could reduce anything to ashes.

Wu Yu was barely able to resist by covering himself with incandescent heavenly rule which weakened the destructiveness of the Death Valley Flame to some extent. Wu Jun also employed his own tricks to resist.

The powers of immortal kernels in this place was indeed weaker than those they had seen outside. If this was the only threat in the middle hall, it would be too simple.

Therefore, Wu Yu and Wu Jun kept their guard up at all times.

At the other end, the three demonic emperors were also creeping forward cautiously. The Eternal Night Frost wasn't a huge threat to them. Even the Olden Demonic Emperor, whose true form was damaged, didn't have an issue resisting the Eternal Night Frost.

Both groups advanced steadily. The middle hall was even larger than the front hall where they encountered Violet-Eyed Emperor previously. Therefore, it would take them a long time to cross the entire place.

When they were halfway through the middle hall, the situation changed.

The powers of immortal kernels, Death Valley Flame and Eternal Night Frost, in the two regions of the middle hall ravaged abruptly and shrank furiously towards the center of each region, as though some force was devouring the immortal kernels!

"What's happening?"

Wu Yu's heart started racing. He stopped immediately while observing the centers of the two regions.

Wu Jun and the three demonic emperors acted the same and didn't dare to make any reckless moves. As the Death Valley Flame and Eternal Night Frost contracted furiously, they caused extreme violent flames tornado and frost tornado that swept all five of them in.

With the incandescent heavenly rule covering him, Wu Yu barely survived in the flames tornado. After, he saw the center of the left region gradually becoming a scorching sun as the Death Valley Flame compressed!

"This is...... an eternal demon emperor!"

Wu Yu and Wu Jun were both stumped to see a pair of golden eyes appearing on the scorching sun. The eyes were intimidating and were filled with the probably the most impetuous flames of this world.

To their surprise, the Death Valley Flame compressed to become an eternal demon emperor. However, similar to the Violet-Eyed Emperor they encountered previously, this eternal demon emperor wasn't alive but a corpse puppet that was created with a corpse.

This eternal demon emperor was an extremely ancient eternal demon emperor that was born with the genesis of the world and could exist as Death Valley Flame!

On the other end, the Eternal Night Frost also compressed further into a black sphere that resembled the moon. Despite being a distance away, it resonated with the golden sun.

"They are Yang Origin Emperor and Yin Original Emperor! Both of them were eternal demon emperors of the Demon Immortal Realm! To think that they have been made into corpse puppets......"

From the memories of some demon kings Wu Yu had devoured previously, he found some records of the two eternal demon emperors.

Yang Origin Emperor's true form was Great Yang Origin beast while the Yin Origin Emperor's true form was Great Yin Origin beast. Both of them were born with the genesis of the world. Even the countless demon kings that Wu Yu had devoured had no clear clue of how far back both of them could be traced to.

Violet-Eyed Emperor was just a brat compared to them. Naturally, in terms of strength, the Great Yin Origin beast and Great Yang Origin beast together were several times stronger than Violet-Eyed Emperor.

As recorded, if the Yin-yang Origin beasts collaborate, they could even go against three eternal demon emperors of the same cultivation realm. Through their teamwork and cooperation, they could unleash even greater strength.

When Wu Yu recognized the identities of the two corpse puppets, the other three demonic emperors clearly had too.

Perpetual World Tree screamed immediately, "Hold that Great Yang Origin beast there and don't let it come over. Otherwise, we will be dead for sure!"

Once they were made into corpse puppets, the Yin-yang Origin beasts shouldn't possess any intelligence. As such, they shouldn't be able to unleash the combination attacks they were known for.

Wu Yu with Wu Jun and the three demonic emperors would try to hold one each so the two corpse puppets couldn't get together. By doing so, their comprehensive strength would be greatly discounted.

Wu Yu naturally understood the reasoning. However, the issue was that either one of the Yin-yang Origin beasts was stronger than the corpse puppet of the Violet-Eyed Emperor. For Wu Jun and him to hold down the Great Yang Origin beast, the difficulty was too great!

However, there was no better option.

Once the Great Yang Origin beast regained its form, a wave of blistering flames swept towards Wu Yu and Wu Jun abruptly, almost roasting them.

The Great Yang Origin beast was just like the scorching hot sun. The blistering waves of flames emitted by it were its specialized heavenly rule power known as Chaos Flames heavenly rule. It was also this heavenly rule power that enabled it to exist as Death Valley Flame.

Wu Yu and Wu Jun used their own techniques and tricks to escape immediately. For two of them to face an eternal demon emperor by themselves, this was way more perilous than they were in the front hall.

In fact, they could only escape desperately, unable to unleash any meaningful attacks on the scorching sun in the center of the region. Even so, they were constantly torched by the blistering waves of fire with their hair burned to a crisp.

"This wouldn't do. It's too powerful and we aren't a match at all!"

Wu Jun tried attacking but the moment his Dragon Breath heavenly rule came into contact with the Chaos Flames heavenly rule, it was gobbled up. Even the Dragon Breath heavenly rule was set ablaze and reduced to nothing by the blistering heat.

When more and more waves of flames swept over, the Worldly Illuminator heavenly rule by Wu Jun was on the brink of collapsed.

He wasn't as agile as Wu Yu and could only resist directly with his strength. However, he was just a 9-heavens immortal king. There's no way it would be easy for him to resist an attack from an eternal demon emperor.

After resisting several waves of heat, Wu Jun couldn't hold on longer. The body of the Primordial Immortal Dragon was almost charred and blackened.

If this went on, it would just be a matter of time before Wu Jun died in battle.

Fortunately, Wu Yu wasn't too far away. Before the next heat wave swept across, Wu Jun returned to the Floating Dreams Pagoda to recuperate. The middle hall was sufficiently huge and Wu Yu began his escape by using the Somersault Cloud.

Obviously, he didn't dare to run too far or the Great Yang Origin beast might head towards the three demonic emperors. He could only use Fulgurating Shadows but not do a flip.

Wu Yu was observing the battle on the other end. He realized it was a one-sided affair as well. The pitched-black moon was stationery while releasing cold waves towards the three demonic emperors. As the cold waves swept, even the void space along the way was frozen.

The three demonic emperors could only barely hold up. It's almost impossible for them to kill the Great Yin Origin beast judging from current circumstances.

Wu Yu was just waiting to escape to the nearby space when the Great Yang Origin beast attacked himself. However, the Great Yang Origin beast wasn't that easy to fool. After Wu Yu escaped consecutively, its battle instincts propelled him to use a trapping technique on Wu Yu.

"Imprisoning Death Flame heavenly rule!"

Endless Death Valley Flame emerged around Wu Yu, forming lines of flames that shrank towards Wu Yu.

The Imprisoning Death Flame heavenly rule was an imprisoning technique of the Great Yang Origin beast. Once Wu Yu was trapped, he would be tormented by endless Death Valley Flame for eternity. Even if Wu Yu had the Invincible Vajra Body, he would probably be reduced to ashes eventually!

"It locked the surrounding space?!"

Wu Yu could sense the space around him was locked the moment the Imprisoning Death Flame heavenly rule was unleashed. Every inch of the void space seemed to be blazing and controlled by the Death Valley Flame. If he had only used Fulgurating Shadows, he wouldn't be able to escape the predicament.

In a hurry, Wu Yu couldn't care about what's happening at the other end. He did a flip, vanished from sight and escaped the Imprisoning Death Flame heavenly rule!

After a flip, Wu Yu reappeared at a relatively far place. This caused the Great Yang Origin beast to change his target.

The three demonic emperors were closer to the Great Yang Origin beast now!