Netherworld demon king-level powerhouses generally have saint-level strength, which is far beyond what Xu Yang can fight. For example, on the path of immortals and demons, Xu Yang once had a confrontation with a demon king named Sinan through a layer of netherworld cracks.

It's just that the four demon kings in front of me, I don't know why, their strength is only equivalent to the high-level world venerable of the Six Tribulations, and they are far from the ferocity of the Sinan Demon King.

"Hmph...... The kid has two hits, come again!" The Broken Horn Demon King's conjuring banner continued to shake, and thousands of white shadows roamed around Xu Yang, turning into a fierce ghost with a fierce roar, and rushed towards Xu Yang!

These powerful ghosts have no entity, and ordinary occult attacks are difficult for them to use.

It's just that Xu Yang happens to have the means to restrain the yin ghosts!

Xu Yang shook his hand and threw out a jade talisman, and then the thunder flashed all over his body, switching the Xuanli attribute to the thunder pole, and one after another the seals hit the jade talisman! A crackling sound surged, and the light on the jade talisman flickered, transforming into a grand prison, and there were three majestic characters of "Five Thunder Prisons" on it!

"What kind of treasure is this, it actually contains such a pure Thunder Pole Heavenly Might!" The Broken Horn Demon King's face changed, and the Five Thunder Prisons that Xu Yang took out were simply his nemesis.

"Oh my God, this is the holy relic of the Thunder God Clan, the Five Thunder Prisons!" After seeing the three big characters of the Five Thunder Prisons, the face of the Broken Tooth Demon King in the western sky changed suddenly, and the two fangs trembled a little, "Could it be that the Thunder God Clan is still stranded in the Tianxuan World? This is impossible!"

The Broken Horn Demon King's face changed greatly, and when he heard the name of the Thor Clan, his heart trembled, and it was obvious that this mysterious race had some kind of hostile and even restrained relationship with the Netherworld.

"Don't panic! Even if Xu Yang obtained the Five Thunder Hells by chance, he would not be able to have the corresponding Urging Seal Technique! Without a holy weapon that matched the Seal Technique, he would not be able to exert his true power at all. It's just the power of transfiguration. It is impossible to deal with us. In the northern sky, the Black Beaver Demon King shouted coldly.

The Black Fly Demon King in the southern sky nodded: "Yes! I don't believe that Xu Yang can get the seal of the Five Thunder Prisons! The Thunder God Clan has been oblivion for a long time, and the seal of the Five Thunder Prisons must have been lost in the Tianxuan World a long time ago." ”

"Huh...... I've disappointed you, Nine Heavens Thunder Seal!"

The seal in Xu Yang's hand changed, and the Nine Heavens Thunder Seal obtained from the Dongye Ghost Clan was instantly imprinted on the Five Thunder Prisons! Look at the Five Thunder Prisons of this seat, the Thunder Prison!"

The five thunder prisons in the void shone brightly, and the first layer of the thunder prison suddenly opened, and the spirit of the thunder that flashed with silver light rushed out in all directions!

Xu Yang's current skill is comparable to that of the Six Tribulation World Venerables, and he is finally able to activate the power of the Holy Weapon Five Thunder Hell. If the cultivation is not enough, or if there is no Nine Heavens Thunder Seal, you can only use the power of transfiguration, and it is impossible to threaten the masters of the Netherworld like the Four Great Demon Kings.

Boom! Boom!

The sound of thunder. The roar sounded, and the thousands of powerful ghost attacks that the spirit banner swung out were swept away by the silver thunder spirit! The Broken Horn Demon King let out a long scream, these powerful ghosts were all transformed by his original resentment, and under this blow, he suffered a lot of losses.

"Damn, Shippo Soul Eater, go!"

Seeing that the Broken Horn Demon King, who has always been good friends, suffered. The Toothbreaker Demon King in the western sky was furious, and seven glowing orbs shot out. Turned into seven extremely hideous skull images and rushed towards Xu Yang.

The Seven Treasures Soul Devourer is a very vicious treasure weapon, and after devouring each other with thousands of ghosts, the seven-headed Yin Ghost finally collected is powerful, and the desire to attack is extremely strong!

"The second heaviest of the Five Thunder Prisons. Prison of Arrows and Thunder!"

The seal in Xu Yang's hand changed, and the five thunder prisons suspended above his head, the second layer of the arrow and thunder prison suddenly opened! The yellow arrow and thunder spirit, which had been trapped for countless years, roared and charged out, a series of crackling lightning rays containing pure heavenly power. Shatter all those seven terrible spirits!

Those seven-headed spirits were lucky to reunite with their ghost bodies after the power of arrows and thunders, but their bodies were vain, and their vitality was already greatly damaged! The Broken Tooth Demon King urged again and again, but those seven-headed spirits did not dare to impact Xu Yang again, but instead roared and bit each other.

It turned out that Xu Yang's blow to the Arrow and Thunder Prison had already wiped out the magic technique engraved on the origin of the seven-headed spirit in this seven-treasure soul devouring treasure weapon, and the seven-headed spirit no longer obeyed the orders of the Tooth Breaker Demon King.

In the blink of an eye, the two demon kings suffered two big losses in the hands of Xu Yang! The other two demon kings did not dare to make a move, but shouted in unison: "Quick, form a formation!"

The four demon kings have been friends for many years, and they have long been tacit understanding. They all realized that Xu Yang was carrying such a holy object as the Five Thunder Prisons, and he was born to restrain the four of them, and he would definitely not be able to defeat Xu Yang by fighting alone. For today's plan, only by uniting the strength of the four people and trapping Xu Yang in the formation can there be a chance of victory.

"Huh...... The Demon King of the Netherworld, he actually wants to form a formation against my little Three Tribulation World Venerables, what a great honor!" Xu Yang laughed, the fifth thunder prison opened the third time, and the roaring black thunder spirit rushed in all directions like inky raindrops, and within each small "water droplet", there was an explosive terrifying thunder power.

"Huangquan Killing Array!" The four demon kings occupied the four corners respectively, and each threw out a white bone-shaped artifact, and the rich yin qi gushed out, completely enveloping Xu Yang and the others in it! The black spirit of dripping thunder bombarded the surrounding wall of yin qi, but it was like a stone sinking into the sea, and there was no trace.

"This Huangquan Killing Array has some doorways. "Across the thick wall of yin qi, Xu Yang couldn't see the reality of the formation for a while, so he could only put away the Five Thunder Prisons.

Ye Nanguan and Kong Bai had time to talk to Xu Yang. They first thanked Xu Yang for his help, and then also participated in the exchange of formations.

"I didn't expect it...... The Demon King of the Netherworld actually stepped into the Yang World, this is a major event that has not been encountered in 10,000 years!" Kong Bai Zhenren sighed, "Every Demon King of the Netherworld is a very terrifying being, and with a wave of his hand, he can make thousands of living beings become powerful ghosts...... These four demon kings of the Netherworld, if they are allowed to entrench in the Middle Continent, it will not be long before the entire Central Continent will become a ghost domain. ”

"But it's a little strange, all the titled demon kings in the Netherworld have the strength of the Ghost Saint level, which is comparable to the saint ancestors in our Cultivation Realm! Why do these four demon kings only have about six tribulations of cultivation?" Xu Yang wondered.

Ye Nanguan Zhenren smiled bitterly: "Don't worry about these for now, just four Six Tribulation Ghost Venerable powerhouses are tricky enough." Especially this Huangquan Killing Array, the changes in the formation patterns contained in it are all fields that we have rarely come into contact with, how to break the formation?"

"Hehehaha......"

The laughter of the four demon kings resounded at the same time in the boundless wall of yin qi, fluctuating, making it impossible to distinguish the direction.

"Xu Yang, you don't want to crack this Yellow Spring Killing Array! This formation, but our great Demon Emperor comprehended it from the rules of the Heavenly Dao, simulated the Nine Tribulations and Ten Tribulations, and deduced it! Now, let's experience the horror of this Yellow Spring Killing Array......

The surrounding scenery changed drastically, the sky suddenly darkened, and ethereal ghosts loomed around. Moreover, even the surrounding Xuan Qi was unconsciously transformed into Sen Ran Yin Qi. Fortunately, all the people present were world-honored people who had cultivated well, and they could avoid the invasion of yin qi by tightly closing their membranes. It's just that in this case, it will be impossible to obtain Xuan Qi from the outside world to replenish consumption, and Xuan Power can be said to be less than one point.

"All around is yin...... What a Yellow Spring Killing Array actually simulated an illusion similar to the Netherworld!" Ye Nanguan is truly humane.

"According to the scriptures, any soul with great perseverance who does not want to lose the memory of this life will refuse to drink Meng Po soup and go through the nine tribulations and ten tribulations by himself! And the nine tribulations and ten tribulations refer to the nineteen tribulations that have been experienced through the eighteen layers of hell in a row! Throughout the ages, people who have been able to fully understand the nine tribulations and ten tribulations have hardly existed. Kong Bai Zhenren was familiar with the classics, and immediately spoke.

"People who have passed through the nine calamities and ten tribulations, I know a ......" Xu Yang remembered Tian Wuhua, one of his lovers in his previous life. The last time they met, Tianwuhua chose to be in the Xuantian Mausoleum on the Immortal Demon Road to fight against the cracks in the Netherworld and protect the Xuantian God's Mausoleum from being desecrated.

"The Netherworld has begun to invade, but Tianwuhua is nowhere to be found......" Xu Yang felt a trace of worry in his heart, wondering what Tianwuhua's situation is now?

If Tianwuhua has been promoted to the World Venerable again, then he should not be able to stay on the path of immortals and demons, and may have returned to Middle-earth. But if Tianwuhua had not been promoted to the World Venerable, then with her paranoid character, she would definitely stay in the Xuantian Mausoleum and suppress the cracks in the Netherworld all the time. In this case, it is possible that he has been captured by the powerhouses of the netherworld.

"These demon kings, I must catch them! If nothing else, even if it is for the whereabouts of Tianwuhua, I have to fight for it. Xu Yang thought to himself.

The first level of the eighteen layers of hell, the hell of tongue pulling, in this hell, you have to bear the pain of tongue pulling.

In the surrounding yin qi, cyan demon figures holding iron tongs emerged one after another, floating towards everyone.

"Hmph, if we are really dead, ten thousand sword tricks!" Ye Nanguan Zhenren snorted coldly, and a dazzling sword light poured out from his fingertips, shooting on the body of that group of cyan demons, and the power of the Six Tribulations High-level World Venerable was fully revealed.

However, those cyan demons were like disembodied phantoms, and the brilliant sword light of the Ten Thousand Sword Technique projected through their bodies without causing the slightest damage.

"Looks like this attack doesn't work for them...... Okay, try the old man's twilight drum and morning bell!"

Kong Bai Zhenren also made a move, and a set of bells and drums were condensed between his palms, and they slammed down! Suddenly, sound waves like substance spread out in a ripple shape, rushing towards these cyan evil ghosts!

This move, "Dusk Drum and Morning Bell", contains the power of Kong Bai's real people's six tribulations, and has a strong restraint against things like yin ghosts. (To be continued......)