After more than ten years on the mountain, you will become invincible when you come down.

"Lu Feng, how can you avoid killing me?" the old man in black robe asked in horror.

"Do you want to die?" Lu Feng asked in a deep voice.

"I don't want to die. No one wants to die. If I can live, I will definitely live..." the old man in black robe said quickly.

Lu Feng thought for a while and then said, "Don't say I didn't give you a chance. If you really want to live, it's not impossible..."

The old man in black robe was overjoyed and asked quickly, "What conditions do you have, tell me, if you can do it, you will definitely agree..."

"It's very simple, hand over a piece of your soul, accept me as your master, serve me, and if you behave well, I will spare your life..." Lu Feng said.

The old man in black robe was silent and began to get entangled. He was not willing to let a Daluo Jinxian recognize a mid-level Celestial Immortal as his master. He did not want to...

But he didn't want to. Maybe he was facing death. If he accepted him as his master, he might not die, but he was more afraid of Lu Feng's endless humiliation...

Lu Feng saw that the old man in black robe was reluctant to make a decision, and the flying sword appeared in his hand again, "Looking at you, it means you don't want to. Since there is no use keeping you like this, then you can Go accompany your Senior Brother Fang..."

Lu Feng said and was about to take action.

The old man in black robe was stunned and quickly stopped him, "Wait a minute, wait a minute, I promise you, I will recognize you as my master..."

A smile appeared on Lu Feng's lips. This old man in black robe was frightened. With the amount of immortal power in his body, if the old man in black robe resisted, I'm afraid Lu Feng wouldn't be able to do anything to him...

But when the old man in black robe saw that Senior Brother Fang was dead, he obviously had no intention of resisting...

Lu Feng put away the flying sword and said in a deep voice, "Okay, I will give you this one chance to hand over your soul..."

The black-robed old man gritted his teeth and reluctantly separated a bit of his soul and gave it to Lu Feng.

Lu Feng took over the soul and used the magic technique to integrate it into himself.

With this trace of his soul, if Lu Feng didn't like him, he could kill him at any time...

Lu Feng controls his life and death. Likewise, the old man in black robes no longer dares to act recklessly in front of Lu Feng, otherwise his life may be in danger at any time...

From then on, the old man in black robe became Lu Feng's slave. Although he was unwilling to do so, he had no choice but to do so in order to survive.

"Just follow me from now on, I won't treat you badly." Lu Feng said looking at the old man in black robe.

The old man in black robe nodded respectfully, "Yes, Master."

"You don't have to worry. Just serve me well in this secret realm of Xiantian. When I get out, I will let you go free..." Lu Feng said.

"Master, are you really going to let me go free?" the old man in black robe asked happily.

"It depends on your performance..." Lu Feng said calmly.

"Okay, okay... whatever the master orders, I will go up to the mountain of swords and go down into the sea of ​​fire, no matter what. If you need anything, just ask the master, I will be happy to help..." the old man in black robe said excitedly.

If there is a chance to gain freedom, the old man in black robe will naturally behave well.

What Lu Feng wanted was for him to perform well, otherwise, what would be the use of having him as a slave if he was obedient and submissive?

"Okay, go to the cave entrance and guard it for me. Don't let anyone come and disturb me..." Lu Feng said calmly.

"Yes, Master!" The old man in black robe said respectfully.

Soon, he became accustomed to the role of Lu Feng's slave.

Looking at the old man in black robe leaving the cave, Lu Feng walked into the formation...

As soon as he walked in, Lu Feng felt the force of gravity.

Lu Feng continued to walk forward. The closer he got to the entrance of the cave, the lighter the gravity felt. The further inside, the gravity gradually increased...

Only then did Lu Feng understand why they didn't discover this problem immediately. It was equivalent to boiling a frog in warm water. At first, there was only a slight increase in gravity, but there was no feeling...

The further you go in, the more gravity increases. It’s just added after you get used to it. It’s not so prominent all of a sudden...

By the time he reacted, he was obviously almost at the core area...

Lu Feng sat down in the cross-legged position in the area with the strongest gravity, feeling like a thousand kilograms of weight was pressing down on him...

The bones were crackling under the pressure...

Lu Feng simply didn't do anything and kept releasing all the immortal power in his body, leaving himself in a vacuum state...

After the immortal power was released, Lu Feng felt that the pressure he was under became even greater...

So Lu Feng began to use his exercises, adjust his inner breath, and try to adapt to the huge gravity.

Sweat continued to seep out from all over Lu Feng's body, soaking his clothes, but Lu Feng's eyes became more determined.

As time went by, Lu Feng gradually adapted to this pressure, and his body became stronger.

At this time, Lu Feng found that the immortal energy around him seemed to be much richer than the outside world, and he was secretly happy.

In fact, it was just that Lu Feng's body was extremely thirsty at this time, longing for the bath of immortal energy...

Lu Feng took a deep breath, guided the immortal energy into his body, and circulated around the sky along his meridians.

Every time it runs for a week, Lu Feng's cultivation improves.

After an unknown amount of time, Lu Feng opened his eyes and felt the immortal power in his body. The key was that Lu Feng's cultivation had also been slightly improved, reaching the late stage of immortality. A satisfied smile appeared on Lu Feng's face.

Not only that, Lu Feng felt that his physical body had also been greatly improved under this huge pressure...

There is another thing. Lu Feng found that after his cultivation level improved, the Hongmeng Purple Qi in his body seemed to be stronger...

Lu Feng stood up and stretched his muscles, preparing to continue studying this mysterious formation.

This formation can allow him to improve his cultivation. If used properly, it can also be used to assist his cultivation in the future...

Lu Feng believes that the biggest opportunity here is not to improve a small realm, but the layout of this formation...

Lu Feng carefully observed the formation, trying to find out the mystery.

Lu Feng discovered that the lines of the formation were complex and changeable, and seemed to contain endless mysteries.

Lu Feng was concentrating on studying the formation. Suddenly, Lu Feng noticed something strange.

A faint breath came out from the formation, if there was something but not at all.

Lu Feng concentrated his energy and pursued the aura, and finally discovered a hidden node.

Lu Feng carefully touched the node. In an instant, light flashed and an ancient picture scroll appeared in front of his eyes.

The scroll is painted with strange patterns and runes, exuding mysterious power.

Lu Feng stared at the scroll, feeling a strong desire to explore in his heart.