Soon, after Nie Fei figured out what the Demon King's palace was like, he made a detailed plan, and then rushed out with the Demon King's swish.

Stretch your waist, stay in this mountain stream for so long, worry all the time, come out at this time to take a deep breath of air, and instantly feel happy and comfortable.

Finding a direction, Nie Fei jumped up and headed towards the depths of the Black Iron Forest.

I thought that when I met this demon king, I would enter the depths, and it was not far from the place where the Immortal Yan Ancestor Demon was sealed, but at this moment, I realized that I was still far away, and it was just a depth on the edge.

Nie Fei, flying and gliding at a low altitude, was careful not to let his demons find out, after a few days of cooling, the strength of these demons' search really gradually decreased, but it still existed.

Even if you sometimes encounter a pair of demons, they will fight quickly, kill them instantly, and not let any news pass on.

Under the clues provided by the Demon King, Nie Fei soon saw that between the two deep mountains in the distance, a dark black, hard boulder had built a castle.

The castle is more than ten miles in size, and there is the highest and largest one in the center of the city, which is the palace that the demon king said, and Nie Fei's purpose is to enter it.

From a distance, the Demon King's Palace is really magnificent, this thick and huge stone looks unusually strong, and the defense is super strong.

Looking at this huge castle, the guard is quite a forest, almost ten meters above a guard, it is a little impossible for him to break into it forcefully, after all, except for the four demons, the demons of the four turns of the demon realm, there are more than a dozen people in the entire demon palace, so relatively speaking, the most important thing now is to get an identity, so that it can be mixed in.

He was waiting for the opportunity, the Demon King was the builder of this castle, and he was also the core operator of the entire system, so he naturally knew everything.

On this road, Nie Fei used the bronze big business tripod to hide the aura on his body, not letting him find out, and hiding on a big tree.

Sure enough, it didn't take long for a demon team of more than a dozen people, led by a leader, to walk here.

They are patrol squads that maintain the security of the entire castle outside.

In fact, in the entire Black Iron Forest, it is not only Nie Fei who can enter, many masters, and many greedy humans will enter here. So they had to take precautions and formed patrol squads.

Dressed in distinctive armor that emits a dark glow, and carrying a heavy black sword in his hand, a small line walks towards here.

Nie Fei instantly lifted his spirit, when the team came to him, the light flashed, and the bronze big Shang Ding threw out a bronze light and directly illuminated more than a dozen people, and the dozen or so people suddenly felt trembling all over their bodies, at this time, Nie Fei moved, his fingers turned again and again, directly obliterating all the people, and finally took back a waist card from the captain of the team.

After getting this waist card, Nie Fei changed into the clothes of the team leader and began to think about walking towards the castle.

On the way, he deliberately pretended to be injured, and shouted loudly while running: "Enemy attack, enemy attack......

Nie Fei used his internal strength to let his voice spread, and suddenly on the city wall, there were other patrol teams all looking here.

Nie Fei roared as he ran towards the castle, and soon a powerful aura passed out from the castle, and soon several figures flew over and landed in front of him.

After a simple disguise, transformation, so that what is not is himself, even the breath also urged Da Shang Ding to make changes, so it is generally not carefully observed, it is difficult to be discovered, and because of the help of the demon king, the breath of his deep mountains once exuded all kinds of demonic energy.

The few demon cultivators who came were all in the realm of the Four Turns of Silence Demon, but their strength was really average, and it should have not been long since they stepped into the Four Turns Silence Demon.

"Where is the enemy attack?"

A demon who looked like a bearded old man reached out and grabbed Nie Fei and asked sharply.

"Where, my team escaped from me, a young man. Nie Fei pointed to the place in the distance where he had just slaughtered the team.

"Hmph, it can't be that kid that day!" one of the demons had a chill on his face, and first showed a look of shock.

"It doesn't matter if he is or not, let's go, we will catch them and hand them over to the four commanders, and our status will be elevated, and we will never be angry again. The old man looked at Nie Fei, threw it to the ground, and flew away with a few other people.

Nie Fei was thrown to the ground in all kinds of ways, and deliberately moaned in pain, looking particularly embarrassed and without any combat effectiveness.

"You two, go and take this captain to rest in the city, and the others will follow me ......"

A demon leading a dozen squads pointed at the two demons and commanded.

Nie Fei blended into the city like this, and as soon as he entered the city, Nie Fei found an excuse to kill the two demons directly in a no-man's land, and then rushed towards the treasure house.

Under the leadership of the Demon King, Nie Fei entered it as fast as he could.

Later, he changed his various identities and secretly blended into the place where the core demon king lived.

Mixed in, Nie Fei directly killed the people inside, and came to a high tower, this is the treasure house, the tower towers, straight into the sky. There is no end in sight.

Nie Fei slashed the guards and entered it, and saw that the first floor was empty, and there was nothing inside.

According to the Demon King, the most valuable thing in this treasure trove is not at the top, but at the bottom. In the deep underground.

Coming to a boulder that was nothing like other boulders, Nie Fei found the mechanism, and a secret door suddenly opened, revealing a secret passage.

This underground layer is where the most precious thing of the Demon King himself is placed, and only he knows that there is such a basement in the entire Black Iron Forest.

Nie Fei kept entering, and the secret passage was sealed again.

The essence of life that the Demon King said was stored in it.

Entering it, after nine bends and eighteen bends, I soon came to the underground I don't know how many floors, but now I am in a hall, this hall is quite vast, the size of a football field.

In the center of this hall there is a pool of blood, which is divided into two levels, the outer and the inner.

Outside, there was hot blood in the pool in a circle, and there was indeed a milky white liquid inside, bubbling with a boiling cold.

Entering here, Nie Fei released the Demon King and said in a cold voice, "What's going on?"

Because in the entire hall, except for this pool, there are few other things, and no life essence has been found.

"My lord, that's the essence of life. The Demon King pointed to the milky white liquid that was bubbling with a chill.

"That's the essence of life?"

Nie Fei frowned, how could he be so cold?

"My lord, you must be wondering why the life essence is so cold, it's like this......" The Demon King began to explain to Nie Fei.

Through the explanation of the Demon King, Nie Fei finally knew that this life essence was not the kind that was extracted from people, but appeared from the earth itself, which was very different from what was refined from people.

In fact, this milky white liquid is not called "life essence", but should be called "the milk of the earth", there is such a sentence, the earth is the mother of human beings, and this milk of the earth is the ** that raises children.

Therefore, the milk of the earth, relatively speaking, is more powerful than the energy contained in the essence of life.

And the essence of suppressing the life essence of the Immortal Yan Ancestor Demon is actually the Milk of the Earth, this Milk of the Earth is too powerful, and the human demon is just the opposite, which can just suppress the Immortal Yan Ancestral Demon.

Knowing everything, Nie Fei's heart thumped, such a pool, I am afraid that it is more than enough for him to break through to the Four Turns of Silence Demon, and he can also take away the people who gave it to him, and the people of the Yan Demon Palace, so as to grow stronger and improve the overall strength of his Yan Demon Palace.

"What's that hot blood out there?"

Nie Fei looked at this hot liquid like hot blood, and couldn't help frowning and asked.

Because he didn't smell the pungent smell of blood, he wasn't sure it was blood.

"Blood, a kind of demonic beast's essence blood, is used to increase one's spiritual experience, and only through this layer can one enter the pool of the earth's milk for cultivation. The Demon King explained.

"What kind of demonic beast's essence blood, how many demonic beasts do you have to kill in such a pool to accumulate so much!" Nie Fei couldn't help but be shocked in his heart.

The demonic beast that the demon king said in the air is the demon beast in the mouth of humans, but the name is different.

"Over the years, if not 100 million, there are 99 million. ”

The Demon King said lightly.

Essence blood is not the same as blood, essence blood is the essence of a person's bloodline, and the general demon beast of the second turn soul demon can refine ten drops of essence blood, which is quite high.

With such a pool, more than 100 million may have been killed.

Now Nie Fei knew why he didn't encounter demon beasts along the way, it is said that such a large forest, there should always be demon beasts!

At this point, he knew exactly what was going on.

Now Nie Fei also knows why he didn't ask about the smell of blood, essence blood is different from ordinary blood, it is the essence of the bloodline of demon beasts, it does not have the smell of human fish, it is said that such a pool of essence blood is also equivalent to a treasure. Being able to practice here will definitely greatly improve your mental state.

"Hehe, that's good. Nie Fei's eyes showed surprise, and even greed, and he also made a decision in his heart, he must take all this pool away and put it in the Flame Demon Palace for the disciples in the palace to cultivate. In this way, the entire Flame Demon Palace will soon be able to cultivate a group of masters, and no one will dare to bully the Flame Demon Palace from then on.