This layer of transparent light curtain is naturally a defensive barrier condensed by the power of the formation, preventing someone from breaking through from underground. As a mountain protection array of the ground level, it is naturally impossible to have loopholes everywhere, and people can take away the eighty-one Xuanyin Demon Evil Flags with a random escape technique.

Ling Feng urged the Void Heavenly Eye, and his silver eyes passed through the formation enchantment, and saw an underground stone chamber, which was not large, but there was a nine-foot-high Dharma platform inside, engraved with dense Xuanyin runes, and a black flag was inserted on the Dharma platform, the flagpole was made of hundred-year-old Netherworld Iron, and the flag was woven of black silk thread, with a terrifying image of not a demon or a demon head, but the pair of turquoise eyes seemed to be flashing with greedy light, like a real devil.

The Yin veins and spiritual energy under the earth kept surging towards that black banner. As expected, this is the so-called Xuanyin Demon Banner. And there is a passage on the left and right of this stone room, which is like the meridians of the human body, leading to the other eight stone chambers with the Xuanyin Demon Evil Flag. The Xuanyin Demon Banner of every nine stone chambers formed a Xuanyin Nine Palace Array, and the nine Xuanyin Formations formed the foundation of this mountain protection array. But this is just the foundation, there should be a big nine palace formation on the mountain, corresponding to Qiankun, yin and yang are one.

Good bull breaking formation, each formation flag is a fifth-order magic weapon, how many amethyst coins do you get for 162 array flags? If he is the only one, it is really a little helpless. But if there are five Martial Venerable powerhouses on it to cooperate with the strong attack, the power of the formation will be contained. He and Cai Yue attacked at the same time below, making it difficult to take care of the end and the end, and the chance of breaking through was very high.

Immediately, Ling Feng's divine mind transmitted the message to Chilei Zhenjun, that is, he was already in place and could act. To be honest, it takes a lot of soul cultivation to transmit the sound of divine thoughts in the earth, but with the powerful divine soul at the peak of his martial honor, he doesn't care.

On the ground, Chilei Zhenjun learned the information, and immediately took out his own magic weapon with Cai Guo Taizu and the other four people, and attacked the defensive barrier of the mountain protection array with all his might. The hundred-zhang-long Gengjin sword qi, the hundred-zhang-long pure yang sword qi, the hundred-zhang-long thunder fire dragon, and the hundred-zhang-long Qinglong law phase, each attack is extremely terrifying, and such an attack is naturally a cannon to fight mosquitoes against the strong Wuzun, and it has no effect, but it is naturally just right to deal with this kind of formation that cannot be moved.

The three-foot-thick defensive barrier was crumbling, causing bursts of terrifying ripples, if it weren't for the Yin Netherworld Demon Venerable to put out the fire in time, it really couldn't be resisted, and even the mountain would have been flattened.

At this time, Ling Feng had also taken the opportunity to attack underground, and the Chaos True Dragon Sword slashed with all his might, and the three-foot-thick defensive barrier was cut by two-thirds, but the difference was a millimeter, and it was missed by a thousand miles. Once Ling Feng retreated, the power of the formation would quickly repair the defensive enchantment, and in the end, it would only be in vain. But at this moment, the true dragon primordial god of the sword spirit emerged from the sword, rushed forward, pierced through the defensive barrier, and came out with a bite of a Xuanyin Demon Evil Flag.

One formation node was missing, and the formation enchantment suddenly shrank inward, but it was not broken. Unless one of the nine Little Xuanyin Nine Palace Formations is completely destroyed, it will cause the formation to collapse. This is also why Chilei Zhenjun said that at least nine or more array flags should be destroyed. Obviously, the traitor he planted in the Netherworld Sect had already made the situation very clear.

Immediately, Ling Feng erased the devil inside the array flag, threw it into the Nether Ring, and then continued to steal the next array flag.

When there were four less formation flags in this little Xuanyin Nine Palace Array, a primordial god finally came. This Dao Yuan Shen is black, and it seems to be similar to the ordinary Xuanyin Yuan Shen, but it is actually the Heavenly Poison Yuan Shen that the Heavenly Poison Demon Lord has collected and condensed the poison of many kinds of heaven and earth poisons, and the quality is similar to that of the second-grade Netherworld Yuan Shen. And the power is even more terrifying, not only can it poison the sixth-order dragon, but even the primordial spirit of the martial venerable powerhouse can corrode it. Even Ling Feng was a little depressed. Because this thing is really a bit difficult to drink, although it can be refined with Chaos True Fire, it always feels a little disgusting.

However, since he came, Ling Feng had to kill him, otherwise it would be difficult to break the formation with him presiding over the formation.

He was now standing on an abandoned magic platform, condensing the Chaos Sword Intent with all his strength, and slashed out a Chaos Sword Intent. If it was on the ground, the Chaos Sword Intent would definitely turn into a long river of chaos that swept the heavens and the earth. However, the underground space is narrow, and his sword intent can only take the path of condensing to the extreme.

The Yuan Shen of the Heavenly Poison Demon Lord immediately mobilized the power of the nearby formation and his own mana to defend together, just like an earthen wall that might be directly hit by a car, but if this wall was thickened by ten times, the outcome would naturally be different. Therefore, Ling Feng's chaotic sword intent was blocked without any accident.

However, at this moment, Ling Feng's figure suddenly flashed, rushing towards another stone chamber connected by a passage, instantly swinging his sword to break through the defensive barrier and take away the Xuanyin Demon Banner inside. With the Void Heavenly Eye of the Perfection level, he naturally saw the weak point of the defensive enchantment at a glance and broke it in one fell swoop.

With the loss of the five Xuanyin Demon Demon Flags, the power of this little Xuanyin Nine Palace Array has been greatly reduced, and even if it is controlled by the Heavenly Poison Demon Lord, it is no longer able to return to the sky. Ling Feng quickly took the remaining four array flags one by one. At the last moment, the incarnation of the Heavenly Poison's Yuan Shen wanted to escape, but was slashed by Ling Feng's chaotic sword light, and his body was severely damaged, and the will of the Yuan Shen was worn out by seventy percent, turning into a mass of highly poisonous Yuan Shen Qi.

The Yuan Shen Essence of an ordinary martial arts powerhouse is much stronger than the Sixth-Order Spirit Pill, and it is a great tonic, but a mass of Yuan Shen Essence is super poisonous, even if it is a sixth-order Jiaolong with extremely strong anti-poison ability, if it swallows this Yuan Shen Essence, it will only die of obedient poison.

Is this thing useful? Yes, and it is very valuable, so Ling Feng took him into the Chaos Bead of the Sea of Consciousness and refined it with Chaos True Fire. Anyway, all kinds of vitality will eventually return to chaos, and there is nothing that cannot be digested.

At this time, as a small Xuanyin Nine Palace Array completely disappeared, the Great Nine Palace Array naturally collapsed immediately, and the gathered Xuanyin Yuan Qi quickly dispersed.

Above the ground, the defensive barrier that enveloped the entire Netherworld Mountain was rapidly dispersing.

The face of the Yin Demon Venerable was extremely gloomy, and he didn't expect that the mountain protection formation would be broken so easily.

Chilei Zhenjun and Cai Guo Taizu all looked surprised, they didn't expect to break the mountain protection array so quickly. Then came the real showdown. However, if the seven martial arts powerhouses besiege four, the odds of victory are naturally extremely high. Coupled with some of their hole cards, the destruction of the four evil sects is already eighty or ninety percent assured.

The dream that has been longed for many years is about to come true, and Cai Guo Taizu and Chilei Zhenjun are both excited.

Immediately, Ling Feng and Cai Yue escaped from the ground together.

At this time, when the personnel arrived, Cai Guo Taizu said coldly: "Destroy the Yin Netherworld Sect!"

Then, the seven martial powerhouses flashed at the same time and rushed towards the Yin Immortal Mountain.