Su Yi didn't know if the toxicity of the ghost dead grass could poison the kobold demon beast.

But with his understanding of the toxicity of the ghost dead grass, even if the poison can't kill this kobold demon beast, it is enough for this kobold demon beast to drink a pot.

With this ghost dead grass to contain the kobold demon beast, Su Yi was confident that he could successfully obtain the fourth layer of ancient alchemy.

Su Yi slowly flew upwards. It didn't stop flying until it was close to the kobold beast that it was about to find itself.

He found a big stone and began to sit cross-legged, cultivating silently.

Before I knew it, another few months had passed.

On this day, it seems that it is the day of eating again.

The kobold beast flew down excitedly.

Su Yi didn't dare to delay, and not long after the ko-headed demon beast flew down, he flew straight to the stone cave engraved with the fourth layer of ancient alchemy.

Forcibly enduring the residual body odor of the kobold demon beast in the stone cave, Su Yi sat cross-legged and began to feel this fourth layer of ancient alchemy with his heart.

The fourth-layer old alchemy technique was even more troublesome and more powerful.

A moment later, like the stone carvings in the other three stone caves, a faint point of light flew into Su Yi's mind.

In his mind, the fourth layer of ancient alchemy was instantly imprinted.

At the moment when the imprint of the ancient alchemy technique was completed, Su Yi opened his eyes and showed joy: "I have finally obtained the fourth layer of ancient alchemy." ”

"Then the old man is going to congratulate you!"

An old voice came from behind him, making Su Yi almost jump in fright.

I saw an old man with a faint glow all over his body, and he appeared at the entrance of the cave at some point, blocking Su Yi's way.

The old man's body, as if translucent, looked rather strange.

Su Yi didn't dare to be careless and slapped the storage bag and took out a large number of talismans.

"What's the use of these kids?"

The old man laughed, and then waved his sleeves, like carrying a little chicken, and picked Su Yi up.

Su Yi was shocked to find that in the face of this old man, he had no room for resistance.

The old man took Su Yi and flew down.

Because Su Yi was suppressed by the old man and couldn't move, he couldn't eat the wind grass, so he could only let the biting yin wind blow on his body.

He was led by the old man to the huge iron gate.

There, the kobold beast lay on the stone slab, motionless, and seemed to be dead.

The old man looked at the iron door as if it were nothing, and easily passed through.

However, halfway through his dressing, he suddenly stopped, as if remembering something, he glanced at Su Yi.

Su Yi was cold, and he was about to faint from the cold.

A thin layer of ice had formed around him, and he was not far from being frozen into a popsicle.

"You can't get through it horizontally, but it's just right vertically."

The old man placed Su Yi's body parallel to the iron railing of the iron gate, and just brought Su Yi over.

The old man carried Su Yi for a while, threw him to the door of a prison, and then a booklet and a brush appeared out of thin air in his hand.

"Kill the guardian demon beast and sentence him to three hundred years in prison."

"Stealing the law and banning the law, sentenced to 500 years in prison."

I just listen to the brush writing in the booklet door, and there is a slight grinding sound.

After the old man sentenced Su Yi, he took out the key from his waist, opened the door of the prison, and threw Su Yi in.

Then, with a click, the old man locked the door of the cell.

Su Yi couldn't move passively.

Fortunately, when his body hit the ground, it shattered the ice that froze on his body.

He reluctantly sat up, closed his eyes, and began to perform the exercises, hoping to withstand the bitter cold.

But Su Yi was stunned to find that the spiritual power in his body seemed to have disappeared out of thin air, and no matter how he exercised, he just couldn't feel a trace of spiritual power.

Not only that, but the ghostly aura in his body was also gone.

This made Su Yi afraid, if this continued, I was afraid that he would freeze to death here.

"Hehe, don't waste your time, you still want to use spiritual power in this heavenly hell?"

A faint voice came from the darkness of the prison, Su Yi didn't know if it was a person or a ghost, but he couldn't move at this time, even if the person who spoke was hostile to him, he was helpless.

"I heard from the cell boss just now, you secretly learned the forbidden technique? It stands to reason that if you practice the forbidden technique to the fourth layer, you won't be frozen to death by the Yin Wind, how do you look at it, I'm afraid you will be frozen to death by the Yin Wind? ”

This faint voice woke up Su Yi.

Although Su Yi couldn't invoke spiritual power or the power of the Netherworld, the instinct of the body still existed.

He began to close his eyes and silently cultivate the ancient alchemy technique of the first layer.

Because of the foundation of refining the body, and Su Yi's body itself has the strength of the Great Perfection Realm in the late stage of the Human Race.

This first layer of ancient alchemy only took a month to practice.

After practicing the ancient alchemy technique of the first layer, the chill on Su Yi's body was reduced by three points.

Su Yi made persistent efforts and prepared to cultivate the second layer of ancient alchemy.

It took a full ten years to complete the second layer of ancient alchemy.

After practicing the second layer of ancient alchemy, Su Yi was able to move slightly.

The owner of that faint voice seemed to be very patient, and did not interfere with Su Yi during Su Yi's practice.

On the contrary, he made remarks from time to time to mention Su Yi's cultivation.

Su Yi ignored this person's suggestion, and after his body was able to move, he began to cultivate the third layer of ancient alchemy.

This practice is 30 years.

After practicing the third layer of ancient alchemy, most of the chill in Su Yi's body had disappeared.

Since it is estimated that the fourth layer of ancient alchemy will take at least a hundred years of cultivation to be cultivated, Su Yi is ready to meet the master of this voice.

The inside of the prison was pitch black, and the prison was made of no known material, and the people locked in it not only could not use spiritual power, netherworld power, but even their divine consciousness was affected.

Su Yi slowly spoke: "Who is Your Excellency, and what kind of place is this?" ”

The man smiled and said, "Little doll, didn't we tell you at the beginning?" This is Hell. ”

Su Yike had never heard of a heavenly prison, so he asked: "What is a heavenly prison, and the previous cell leader, why was Su sentenced to three hundred years in prison for just killing a kobold demon beast." ”

"Also, that ancient body refining method, many elders in the Vajra Sect have cultivated, why don't you arrest them and lock them up?"

The man smiled again and said: "The so-called kobold demon beast you killed is a guardian demon beast, it is not easy to cultivate one, and it is fair to sentence you to three hundred years." ”

"And the Vajra Gate you are talking about, the old man doesn't know very well, but there is no harm in cultivating the first three layers of the forbidden law. And the forbidden law behind the cultivation, you have been imprisoned for five hundred years, so you deserve it, have you ever seen the first three layers of the forbidden law guarded by guardian beasts? ”

Su Yi was stunned when he heard this, then shook his head and said, "It's true." ”

"Su has another question, who are you? Could it be that you were also imprisoned here because of the ancient alchemy you cultivated? ”

The man sighed, "The old man is also imprisoned here because he deserves it." ”

After speaking, he sighed again, as if he could not regret the crimes he committed.

When Su Yi tried to communicate with the man next, the man didn't say a word and began to become silent.

Su Yi had no choice but to continue to cultivate the fourth layer of ancient alchemy.

。。。

The cultivation of this fourth layer of ancient alchemy was much more difficult than the previous layers, and Su Yi went astray several times and almost went mad.

Fortunately, when the cultivation reached a critical moment, that person always spoke up, and Su Yi was able to complete the cultivation of the fourth layer of ancient alchemy.

This ancient alchemy technique is quite wonderful.

There is no need for the assistance of pills, nor does it need the cooperation of magic weapons, after cultivating, his whole body is full of strength.

Su Yi slammed his fist at the cell door.

Boom, a muffled sound sounded.

Su Yi's fist actually sparked with the cell door made of unknown materials.

After Su Yi's body had cultivated to the fourth layer of the ancient alchemy technique, the strength of his body had reached an incredible level.

At the moment when Su Yi's fist sparked with the prison door, Su Yi saw clearly the appearance of the person who had been talking about his cultivation.

This person is a human race, which is not surprising to Su Yi.

To his surprise, this person's body was pierced by iron chains, and his entire old body was full of holes, and he looked miserable.

The muscles and chains had grown together in the wound that had been pierced by the chains, and it looked like the chains had been running through the man's body for a long time.

Unconsciously, Su Yi had been cultivating in this prison for more than a hundred years.

But it seems that this poor old man, who has been in chains, has been in the cage for a longer time.