The entire Fiendish Underworld Metropolis was currently being turned out by Diabolical Dragon King to find out the whereabouts of 10,000 Eyed Taotie and Wu Yu.

However, the two had not even fled far. Rather, after coming to an agreement, they returned stealthily to the vicinity of Fiendish Underworld Metropolis. They found Diabolical Dragon King adn his two remaining 7-heavens demon kings, Spectral Fire Phoenix and Nightmare Ink Qilin, preparing to complete the Ancient Demon Dragon Perpetual Devourer immortal design.

Wu Yu naturally could not allow them to succeed. Taotie Demon King also would not allow Diabolical Dragon King to have his way.

Therefore, the two joined forces and again charged into Underworld Dragon's Den, smashing apart the Ancient Demon Dragon Perpetual Devourer immortal design construction. Their appearance had Diabolical Dragon King tearing out his hair in frustration.

He would personally kill Taotie Demon King, and ordered Spectral Fire Phoenix King and Qilin Demon King to attack Wu Yu together.

Taotie Demon King had not fully recovered from the Ancient Demon Dragon Perpetual Devourer immortal design trap previously, and could not possibly face Diabolical Dragon King head on. Therefore, he immediately turned to flee.

As for Wu Yu, he could not possibly take on two 7-heavens demon kings alone. As Spectral Fire Phoenix King and Qilin Demon King came crowding up, he too could only turn tail. He fled Underworld Dragon's Den, and very quickly met up with Taotie Demon King.

Diabolical Dragon King and the two 7-heavens demon kings did not pursue past the confines of Underworld Dragon's Den. After all, they were afraid of other helpers who might attack Underworld Dragon's Den while they were out.

Wu Yu and Taotie Demon King alone naturally could not carry out this sabotage alone.

At this time, Diabolical Dragon King also understood their intentions. They would not give up on running interference. Therefore, he called back all of the Fiendish Underworld Metropolis' demon immortals, trying to keep tabs on their location.

However, Wu Yu and Taotie Demon King did not appear in the guards' sight at all.

After some time, they magically appeared within Underworld Dragon's Den again, and began smashing up the Ancient Demon Dragon Perpetual Devourer immortal design.

Diabolical Dragon King was going crazy, but he could do nothing against Taotie Demon King.

Once bitten, twice shy. Taotie Demon King would not fall into the same trap again, and Diabolical Dragon King was not that much more powerful to keep Taotie Demon King down.

And with Taotie Demon King around, Diabolical Dragon King could not turn his attention away to deal with Wu Yu either.

As for Wu Yu, he always had to face the combined strength of Spectral Fire Phoenix King and Qilin Demon King - and he was not able to find any opening as he had with Darkstrife Beast.

Each time Wu Yu was hunted down, Spectral Fire Phoenix and Nightmare Ink Qilin would team up well, one attacking and one defending, giving Wu Yu no opening for a counter.

As a result, the Wu Yu-Taotie Demon King team could only halt the progress of the Ancient Demon Dragon Perpetual Devourer immortal design, but not spoil the plan entirely.

And during this time, Wu Yu had not yet worked out a plan to rescue Jiu Ying either. For the moment, it seemed like Diabolical Dragon King was not keeping him by his side. Without more information on his location, Wu Yu could not act.

For now, he could only buy time with Taotie Demon King, and wait for a chance.

After numerous forays, progress on the Ancient Demon Dragon Perpetual Devourer immortal design had all but stopped, and many of the foundational designs had been destroyed by the two saboteurs. Diabolical Dragon King was basically back at square one, the two years of combined work wasted.

Diabolical Dragon King was crushed by this, but at the same time helpless against Wu Yu and Taotie Demon King.

If this continued, there was no way that Diabolical Dragon King could complete the Ancient Demon Dragon Perpetual Devourer immortal design. Each day it remained uncomplete was another day that he could not devour the remnant of the Apocalyptic Chaos Demon's soul.

It was just like a delicious morsel being dangled by one's mouth, which one could not have. It was maddening.

Therefore after three months of guerrilla tactics, Diabolical Dragon King had enough.

One day, Wu Yu and Taotie Demon King had come to the edge of Underworld Dragon's Den, and were again facing Diabolical Dragon King and the two 7-heavens demon kings. Diabolical Dragon King's nine dragon heads were as black as thunder, as he stared daggers at Taotie Demon King. He shouted: "Taotie, you old thief, what on earth do you want!"

Taotie Demon King gave a cold laugh. "Finally made up your mind, it seems. What I want is very simple. You hand over the eternal demon emperor corpse, and we can continue peaceful coexistence. I won't cause any more trouble. What do you say?"

"Eternal demon emperor corpse? Who said anything about an eternal demon emperor corpse?"

Diabolical Dragon King's face was stormy. "If you cause any more trouble, I will appeal to the demonic emperors. See if you can get away scot-free then!"

"Demonic emperors" made Taotie Demon King pale slightly. He was afraid!

These beings were not yet eternal demon emperors, but the strongest throughout the Demon Immortal Realm - 9-heavens demon kings!

There were only a handful of 9-heavens demon kings in Demon Immortal Realm. They reigned over the entire Demon Immortal Realm, and even those like Diabolical Dragon King and Taotie Demon King had to obey their commands.

Of course, demonic emperors normally would not attack other demon immortals, but would merely maintain the balance between the major demon kings.

For example, if there was a huge conflict between 8-heavens demon kings, the demonic emperors would intervene.

They basically stepped in when 8-heavens demon kings were invading the territory of others, such as in the current situation at Fiendish Underworld Metropolis. They would definitely choose to stop Taotie Demon King.

The 8-heavens demon kings each held sway over their respective territories, and were not allowed to do as they truly pleased.

The demonic emperors in Demon Immortal Realm were more or less on the same side. They ruled over Demon Immortal Realm jointly, and there was no force which could challenge their rule.

Demonic emperors were the absolute authority in the Demon Immortal Realm for now.

Therefore, Taotie Demon King felt a twinge of fear at hearing "demonic emperor".

However, he was actually not at all afraid. He had already thought ahead to this. Obviously, Diabolical Dragon King could not threaten him with them.

The reason was because of Diabolical Dragon King's secret. It could definitely not be leaked out. The head of the Apocalyptic Chaos Demon was a secret that Taotie Demon King was sure Diabolical Dragon King would not reveal.

Therefore, Taotie Demon King sneered back. "Scaring me with demonic emperors? You old scaly worm, you're getting senile in your age! Aren't you afraid I'll tell the secret of the Apocalyptic Chaos Demon? It's make-up-your-mind time. If you don't hand over the Apocalyptic Chaos Demon's head, you won't be able to hold it yourself either. Make your choice!"

He had hit the nail on the head, guessing correctly that Diabolical Dragon King would not leak the news.

Hearing Apocalyptic Chaos Demon, Diabolical Dragon King was completely flabbergasted. Could it be that Taotie Demon King already knew?

However, he recovered quickly. If Taotie Demon King knew the truth, then he should know that the Apocalyptic Chaos Demon's head was not in his possession. It seemed like Taotie Demon King had gotten some false news, albeit a tale that had elements of the truth in it.

No matter how close to the truth it was, it was still not true.

Diabolical Dragon King looked at the Heaven Devouring Titanic Beast by Taotie Demon King's side, and a brainwave came to him.

He gave a chilling laugh, and said: "I don't know where you're getting your information from, but since you already know about the Apocalyptic Chaos Demon, then why not share it with you? I can give you 40 percent of the head. We can work together."

Diabolical Dragon King had no other choice. It was impossible for him to take it all by himself now. Taotie Demon King was breathing down his neck, and would not let up.

Therefore, he had made an offer of 40 percent.

This was definitely an appealing proposal to Taotie Demon King. However, he was humiliated that it was only 40 percent, and he would not accept it.

"Just 40 percent? Old dragon, you think too highly of yourself. I won't accept anything less than 50."

Taotie Demon King countered firmly.

Wu Yu was starting to sweat now. He had not expected things to go this way. If the two reached an agreement, then his partnership with Taotie Demon King would be over.

He could not allow it if he was to continue running interference. If they made a deal, Diabolical Dragon King would definitely tell Taotie Demon King the truth. At that time......

Taotie Demon King and Diabolical Dragon King continued to haggle. Finally, Diabolical Dragon King could not shake off his heavy-handed negotiations, and eventually acquiesced to 50-50.

"But the Apocalyptic Chaos Demon skull is currently not in my hands."

After making their deal, Diabolical Dragon King finally revealed the truth, including the existence of Jiu Ying, of the Chaos Demon, and the remnant. Taotie Demon King was soon up to speed.

With this, Taotie Demon King knew that Diabolical Dragon King had to complete the Ancient Demon Dragon Perpetual Devourer immortal design in order to devour the remnant of the Apocalyptic Chaos Demon's soul. From which, he would know where the skull of the Apocalyptic Chaos Demon was.

This was different from Wu Yu's information, and he had even sworn that it had come from Darkstrife Beast's memories.

Through this exchange, Taotie Demon King soon realized that Wu Yu had tricked him.

This made him very angry indeed!