Su Chen turned his head and calmly looked at everyone.

Earlier, he would never dare to fight the idea of the secret passage, and enter the demon cave through the secret passage. Once it is discovered by the monks of the Demon Demon Alliance, it will be troublesome. When encountering Jindan evil cultivation, it is even more unlucky, I am afraid that I will not even be able to escape.

But now, dozens of Jindan monks from the Immortal Sect personally led thousands of foundation building monks and thousands of qi refining armies into battle to attack with all their might, and the Demon Demon Alliance was in danger.

I'm afraid that the high-level monks of the Demon Slayer Alliance will all have to resist desperately on the front line, and they may not even be able to resist it, so how can they have the strength to protect the secret passage.

Su Chen pondered, this was a great opportunity to sneak into the demon cave from the secret passage.

"Kill from behind the secret passages of the Demon Alliance. Their guards are the weakest, but they are the easiest to get the battle merits! Brother Su has a good idea!"

Old Master Lu's eyes lit up and he said in surprise.

"It's okay, let's try it in the secret tunnel!

Ji Yuanzheng nodded.

The monks looked at the fierce battle at the entrance of the Heavenly Wind Canyon and the Demon Cave. The brutality of the frontal battlefield is tingling.

There are some risks associated with entering from the secret passage, but it is not necessarily higher than the frontal battlefield. Naturally, no one objected to Su Chen's idea.

Soon, a group of fifteen monks quietly broke away from the army and quickly sneaked through the dark valley of the abyss of the Heavenly Wind Canyon.

Su Chen once carried the demon banner across the entire thousands of miles of Tianfeng Canyon, and he had already touched the complex situation at the bottom of the valley.

He naturally knew the approximate location of this secret passage, but he didn't dare to open it earlier.

Su Chen avoided the lair of the demon beasts along the way in the canyon, and about half an hour later, he and everyone came to a cliff with rocky cliffs.

This cliff is unusual, and there is nothing unusual about it. If you didn't know in advance, it would be impossible to discover a small secret passage here in the thousands of miles of Tianfeng Canyon.

Su Chen held the "Map of Tianfeng Gorge" and carefully compared it, and the entrance to the secret passage was on this inconspicuous cliff.

The monks searched the cliff carefully and found a mechanism button disguised as a rock, pushing the rock.

On the cliff, a heavy stone gate several zhang wide and tens of thousands of catties opened silently.

Everyone couldn't help but be surprised, and they rushed in.

The entrance was unguarded, and it was clear that the people of the Demon Demon Alliance also felt that no one could discover this secret passage.

The group of them touched this dark secret passage where they couldn't see their fingers, walked for more than ten miles, and finally reached the depths of the demon cave.

Compared with the tens of thousands of monks fighting outside the Demon Cave, the depths of the Demon Cave seemed very quiet, even deadly.

Almost all of the Demon Alliance's men were sent to defend the front line, and there were no people in the deepest part of the Demon Cave.

...

Inside the Devil's Cave.

In a dark, mildew-emitting cavern, thousands of ragged men and women were imprisoned, all numb and haggard, their hands and feet shackled by chains made of fine iron.

All of them were Qi refining cultivators who were captured by traffickers from all over the Divine Immortal Cultivation Realm and sold to the Demon Demon Alliance as mining slaves. In this dark cave, he worked day and night, digging holes in the ground and building fortifications.

When the miners grew old, or died, they were thrown into the underground fire cave and burned to ashes, as if no such person had ever been born in the world.

At the door of the huge cell, there were only three or four Qi Refining Stage cultivators of the Demon Demon Alliance, guarding this huge dungeon.

These evil cultivators were gathered around a table, drinking a few pots of inferior spirit wine, playing a pair of dice boringly, betting on who would patrol and keep vigil at night, and they were extremely annoyed when they lost, and scolded a few words.

This dungeon isn't really much to guard.

Even though a mine slave has escaped from the dungeon, no mine slave has ever escaped this cave alive. Halfway through, they were killed by a trap by mistake, or they were discovered by other demon monks.

Suddenly, a Demon Demon Alliance Foundation Cultivator came to this dungeon with a dark face.

"Deacon Zhao, why are you here?"

Those few were blocking the evil cultivators in the dice refining period, and they were drunk, and they were suddenly startled, and hurriedly packed up and stood up, for fear of being reprimanded.

The foundation building evil cultivator didn't have the heart to pay attention to them at all, and shouted coldly, "The people of the Immortal Sect are coming in." A few of you, immediately drive all the mine slaves away, go to the blood sacrifice array, and carry out the blood sacrifice!"

Those few evil cultivators couldn't help but lose blood in fright.

The Demon Demon Alliance occupies the Tianfeng Gorge Heavenly Danger, and there are green-robed old monsters and more than ten Jindan-level evil cultivators, and there is even the support of Beiyi Barbarian Cultivators, so powerful, why can't it hold it so quickly?

This Blood Sacrifice Great Array is one of the five most powerful guard formations of the Demon Demon Alliance. The extremely ferocious and demonic formation needs to be watered with a lot of blood and soul before it can be activated.

The Demon Demon Alliance keeps thousands of mine slaves on weekdays to dig holes. Once the Demon Slayer Alliance encounters a crisis, the miners are the best sacrifices to activate the Blood Sacrifice Array.

Since the construction of the Blood Sacrifice Great Array, this formation has not been activated. This is the first time, when I heard that the blood sacrifice array was going to be activated, I didn't expect the situation to be so dangerous.

But the qi refining guards of several of their dungeons didn't dare to ask more.

"However, there are thousands of mine slaves here, and if they are all sacrificed in blood, I am afraid that they will resist fiercely, and a few of us will not be able to suppress it!"

"It's okay, I'll take it personally. Execute it now!"

The foundation building evil cultivator shouted in a deep voice.

The guards of the dungeon's Qi Refining Evil Cultivators immediately rushed into the dungeon with fire whips, frantically whipped these miners, and drove thousands of staggering numb miners to the altar of a giant blood sacrifice formation in the demon cave.

The blood sacrifice array is in a blood-colored cave of hundreds of zhang, and there is a dry pool in the cave. In the middle of the pool, there stood a blood-colored spar that was half a foot high.

This blood-colored spar is of extremely high grade. It exudes a strong blood-colored aura, which makes people dare not look directly.

Around it, there were some dry cyan tubes, like the blood of the earth, extending in all directions in the demon cave.

"Kill ——!"

The foundation cultivator looked at the pool, stood with his hands in his hands, and said coldly.

The four evil cultivators immediately raised their knives and pushed the miners to the edge of the pool one by one, slashing them down. "Poof", gurgling qi and blood, splattered out, flowing into the dry pool.

Of course, the blood of a few miners did not do much, not even to nourish the pool.

But the blood of thousands of miners was enough to fill this pool.

The miners, who had been numb and disgraceless, suddenly woke up, and finally knew that they were all going to be killed here, and they all screamed in horror, desperately struggling to escape.

However, all of them were wearing heavy shackles, and they had been digging holes in the demon cave for many years, and their bodies were already extremely weak, and it was not easy to escape.

Those four evil cultivators were strong and martial, holding spiritual swords like tigers into the flock, killing their hands were tired and numb, but they only killed three or four hundred mine slaves, and finally made the bottom of the pool full of qi and blood.

The cultivator thought that they were too slow to kill, and sacrificed a flying sword and flew through the crowd of mine slaves. Suddenly, a large number of heads fell to the ground, and blood splattered everywhere.

These red qi and blood made the shriveled blood veins on the pool bulge, and they seemed to begin to beat one by one.

The half-zhang tall blood-colored crystal also seemed to come to life, and began to absorb qi and blood intensely, blooming with a dazzling blood light. These bloody rays shone on the corpses of mine slaves everywhere.

The soul in the mine slave's body seemed to be struggling to come out under the guidance of blood light.

"The Blood Sacrifice Array is about to come alive, get out of here!"

The foundation building evil cultivator couldn't help but show a little frightened, and quickly turned around and left.

The blood sacrifice array poured into the lives of thousands of mine slaves is so powerful.

Once the Blood Sacrifice Array is activated, the Blood Evil Qi and the newly dead Mine Slave Souls will form a powerful group of Blood Evil Spirits, which will indiscriminately attack and devour all living beings, and envelop the newly dead Evil Spirits, constantly expanding.

The four Qi Refining Period Evil Cultivators were even more panicked, ignoring the fact that they were going to kill those mining slaves who were still alive, and followed behind the foundation building evil cultivators, and staggered and fled.

The green-robed old monster knew how long it wouldn't last, and had already decided to give up on this demon cave.

But before that, it is necessary to use many formations, including this Blood Sacrifice Great Array, to deal a painful blow to the Immortal Sect monks who have attacked the Demon Cave, and may even destroy most of the Immortal Sect monks.