There are hundreds of passages under the mine, to say the least, forming a huge underground labyrinth!

Some of these tunnels were excavated by man, and some were formed after the ruins appeared. The narrow one is only half a person tall, and the wide one can fit at least one truck.

The Demon Heart fled through the passage, and it was clearly terrified of Wei Nan.

Well?

Wei Nan's brows furrowed slightly, and he heard a slight vibration. The frequency of this vibration is not high, about once a minute, but as Wei Nan goes deeper, this vibration becomes stronger and stronger, and every vibration makes Wei Nan feel that the entire mine is shaking.

This is...

Suddenly, a strong light came out from the front of the passage, and Wei Nan's body quickly rushed out of the passage, and he stopped in the air.

At the end of the passage, there was a huge space, at least hundreds of miles in radius!

The space looked lifeless, with a black sea beneath it, calm and unwavering.

This space is surrounded by stone walls, and there are tens of thousands of passages connecting this space on the stone walls!

Waves of vibrations came from the bottom of the sea, and there seemed to be a powerful creature sleeping on the dark bottom of the sea!

What is this place?

If the countless large and small mines are like blood vessels, and the dark sea water is like blood, then this space is a huge heart!

And that terrible vibration is the beating of the heart!

Wei Nan's heart trembled, he seemed to have entered a huge heart, whose heart is this?

At this time, the demon heart had already entered the bottom of the sea, and the vibration was getting stronger and stronger.

Suddenly, a trace of extremely strong qi awakened from under the sea, and it seemed that the ancient gods and demons had stepped through time and space, and suddenly descended on this side of the space, and the entire space shook.

"Who dares to disturb this king!"

An ancient voice sounded, the sea water stirred and surged, and countless demonic qi gushed out from under the sea, and swept towards Wei Nan.

"Hmph, if you're still alive, it's really tricky, and a dead demon dares to be arrogant!"

Wei Nan flicked his sleeves, and countless three-colored flames erupted from his body, instantly burning the demonic qi into the air.

"Who are you?" the ancient voice was a little excited: "No, you can't be him, he died at the hands of the Lord ten thousand years ago. ”

For a time, the Black Sea was turbulent, the huge waves were hundreds of meters high, and a giant hand stretched out from the bottom of the sea, carrying boundless demonic energy.

"Even if you're him, I'm going to wipe you out. The Demon King roared.

Wei Nan didn't know who the person in the Demon King's mouth was, this Samadhi True Fire Technique, he obtained it in the inheritance of the Ancient Emperor, and it was said to be the supreme magic technique of the Ancient True Fire God Monarch.

"Hmph. Wei Nan snorted coldly, and more samadhi true flames poured out, and half of the space was filled with flames.

Although the demonic qi is powerful, the samadhi true fire happens to be restrained.

"Roar~"

The Demon King roared, and his tall body stood up.

"Useless!"

Wei Nan is indifferent, the demons are ferocious, I don't know how many human races have been slaughtered, in ancient times, the two races of humans and demons fought, I don't know how many human races have fallen into the hands of the demons.

Samadhi was cremated into a flame giant, and the temperature in the space rose rapidly, and the waters of the Black Sea were evaporated.

The Flame Giant and the Demon King fought together in an instant, and a terrifying energy spread out.

"Samadhi True Fire is strong, but you are too weak!" the Demon King roared, and an even more terrifying demonic aura trembled.

The flame giant was instantly impacted, and the flames on his body dimmed.

"Hmph, it's enough to kill you!" Wei Nanhan said, as soon as the magic trick in his hand changed, a palpitating aura appeared, and a five-colored divine sword appeared in the hand of the flame giant!

"This is impossible, even that person can't condense the true fire of the Five Madhi, how can you be a Terran kid!"

The demon king was frightened, and his voice trembled the heavens and the earth.

How could Wei Nan explain to it that the sword of the Five True Fire in the giant's hand slashed out, and the space where it passed almost collapsed.

"No!" the Demon King cried out in horror, its massive body instantly slashed and then burned.

"Huh~" The demon king roared in pain, and his huge body collapsed, and his burning body smashed into the Black Sea, and the entire Black Sea was scorched.

The Black Sea boiled in flames, and the body of the Demon King dissipated in the flames.

"With the will of my king, burn all worlds. "The demon king cursed, and several chains of curses shattered from the space.

"Hmph. ”

The sword in Wei Nan's hand lit up, the divine sword slashed out, and the cursed chain was cut off in an instant.

"Whew~" Wei Nan exhaled a breath of turbidity, his face was a little pale, obviously he had consumed too much just now.

Although the Demon King has long perished, it is just relying on the will of the Demon Dao to support the Dao now, but even if it is this will, it is not something that ordinary Jindan period monks can turn a blind to, if it is not for Wei Nan's inheritance to the Ancient Emperor, it is difficult to say who will win or lose.

The demon king is gone, and the Black Sea is still scorched by the true fire of Samadhi. But the scorching sea turned into tens of thousands of demon soldiers, and as soon as these demon soldiers appeared, they quickly burrowed into countless mine tunnels.

These demon soldiers at least have the strength of innate martial artists, and even some of them have reached the strength of grandmaster martial artists!

Wei Nan's divine sword was slashed out, and countless demon soldiers and demons were killed, but some demon soldiers still got into the mine.

It's not good, although the demon soldiers are nothing to Wei Nan, but they are definitely devastating to the warriors of Tianchi, and even those who are strong in the grandmaster are in danger.

Wei Nan rushed into the mine, and at this time, a faint fluctuation suddenly came from behind him.

Wei Nan turned around, and found that a cursed chain broke out of the air, and then instantly rushed into a nearby mine.

There was even a chain of curses! It didn't rush towards Wei Nan, but turned around and entered the mine.

Wei Nan was shocked, the chain of curses was issued by the demon king before he was destroyed, and the impact was huge, if it was worn on an unrelated person, the consequences would be unimaginable!

However, when Wei Nan rushed into the mine, the shadow of the cursed chain was gone, and he couldn't even detect the breath of the cursed power.

Wei Nan's speed was so fast, in the blink of an eye, he swept a distance of thousands of meters, killing hundreds of demon soldiers along the way. And here, he actually met Adjutant Wang and his party.

This group of people seems to be in good condition now, almost all the injuries on their bodies have recovered, and even Zhuge Chen's aura is agitated, and there are signs of breaking through, and it seems that they have gained a lot of benefits in the ruins.

"Wei Nan, you're not dead?" Wei Qianhui was surprised, she originally thought that Wei Nan was buried in the mouth of the demon snake: "I really didn't expect you to say it." There was disdain in her voice.

"You're disappointed that I didn't die?" Wei Nan said.

"Hmph, coward, I don't know what kind of luck you have. Wei Qianhui glanced at her.

"Watch your tongue next time you talk to me!" Wei Nan was angry, Wei Qianhui might be looking for death.