Under the control of Ji Yun's spiritual power, the elixir quickly headed towards the red flame in Ji Yun's palm.

One by one, the pills formed again and fell into the wooden barrel under his left feet.

"90 ......"

Ji Yun's forehead was already covered with sweat.

"96 ......"

Ji Yun's face turned slightly pale, and the spiritual power in his body was actually a little weak.

Constantly refining the elixir, Ji Yun had been going on for more than seven hours, and the spiritual power in his body was about to be exhausted.

However, Ji Yun did not stop to rest, because he had not yet reached the limit, and he could still persevere.

Moreover, he can't rest, he needs to work hard to be able to break through to the fourth-grade alchemist.

"100 ......"

By the time of the hundredth, Ji Yun's spirit also began to appear tired, and there was a feeling that the world was spinning, like a person who stayed up late for a month without sleeping, and there was a possibility of fainting or even sudden death at any time.

Even Ji Yun, under such a high-intensity operation, his mental power was a little unbearable.

At this moment, he is almost at his limit.

However, he can hold on a little longer, and he won't fall easily!

Moreover, at this moment, the four-grade pill in Ji Yun's right hand has also improved, and a round and full Dao Ji Dan is gradually taking shape!

He had to persevere, or he would fall short!

"101!"

One hundred and one pills were formed, but this time, they fell into the jade bottle at Ji Yun's right foot.

Because the one hundred and first pill is the four-pinned pill Dao Ji Dan!

He finally succeeded!

At this moment, Ji Yun finally succeeded in refining a four-grade pill.

From this moment on, Ji Yun became a fourth-grade alchemist!

Under the excitement, Ji Yun only felt dizzy for a while, and hurriedly bit the tip of his tongue, sobered up, and continued to refine the pill.

After the first four-grade pill appeared, Ji Yun became familiar with it.

Soon, the second and third fourth-grade pills were also successfully refined.

Finally, after the three pins of pills were replenished, the one hundred and hundred pills were finally refined.

After refining the last pill, Ji Yun's face was as pale as paper, and his eyes were even more bloodshot.

Without thinking about it, after Ji Yun put all the pills into the burial heaven coffin space, he quickly sat down and practiced the exercises.

At this time, Ji Yun didn't dare to stingy the pure spiritual power stored in the space of the Burial Heavenly Coffin, extracted it, absorbed it into his body, and quickly cultivated.

Outside the house, Ji Mo and Uncle Zhao collected it all night, and the more they collected, the more frightened they became.

Because they found that as time went by, the medicinal fragrance in Ji Yun's room became stronger and stronger, and there was an illusion that it was going to be suffocating.

Fortunately, after more than seven hours passed, there was finally no movement inside.

"Young Master refining has been completed?" said Zhao Bo uncertainly.

"I guess it's done. Ji Mo was also uncertain.

As he spoke, the two of them looked through the crack in the door at the same time and looked towards Ji Yun's room.

Soon, Ji Mo and Zhao Bo found that Ji Yunpan was sitting and cultivating, and stopped alchemy.

"This kid, why is he so desperate......" Ji Mo shook his head, but he was full of energy and paid attention to his surroundings.

Because he found that Ji Yun was a little weak at this moment, if someone attacked like last night, I am afraid that there would be bad consequences.

"Lao Zhao, you go back and rest first, leave it to me here. Ji Mo said.

"How can this be done, the young master is now the time when the old slave is needed, how can the old slave leave?"

In this regard, Ji Mo could only smile bitterly twice, and no longer dissuaded Zhao Bo.

Ji Yun quickly absorbed the pure spiritual power stored in the space of the burial coffin in the room, and the majestic spiritual power quickly converged towards the sea of qi, and while the spiritual power in Ji Yun's body was replenished, the spiritual power also recovered quickly.

Soon, the spiritual power and spiritual power in Ji Yun's body reached their peak.

However, at this time, Ji Yun did not stop, but settled down and continued to operate the Burial Heavenly Technique.

He planned to take advantage of this opportunity to break through his cultivation.

Ji Yun's heart moved, and while absorbing the pure spiritual power in the Burial Heaven Coffin, he also put the Burial Heaven Recipe into operation.

As soon as the Burial Heaven Recipe was put into operation, the aura within a radius of dozens of zhang from Ji Yun instantly formed a fault.

However, Ji Yun didn't care about this, at this moment, the pure spiritual power he stored in the space of the burial coffin, the spiritual power in the air outside, was dispensable, if it wasn't for the principle of not wasting it, Ji Yun wouldn't even bother to absorb it.

Ji Yun didn't care about the aura fault, but Ji Mo and Zhao Bo outside the house were stunned.

"What's going on???" Uncle Zhao's eyes widened, as if he had seen a ghost.

"This is impossible!Why did the aura suddenly disappear?!" Ji Mo was also frightened.

At this moment, he sensed that the aura in the air suddenly disappeared, leaving nothing behind, as if it had been emptied, which was extremely terrifying.

"It's not good, Yun'er is still cultivating, and the aura is suddenly drained, and it's dangerous!"

As soon as he thought about it, Ji Mo almost broke into the door to see Ji Yun's situation.

But fortunately, he still had his senses, and he was not impulsive, but used his divine sense to sense the past in the house.

This perception, Ji Mo was stunned.

"This ...... How is this possible......"

Ji Mo wiped his eyes, thinking that he had seen it wrong.

"Young Master, the spiritual power around your body is too terrifying!" At this time, Zhao Bo also discovered the abnormality and said dumbfounded.

"Shh......h

"Yun'er seems to be breaking through his cultivation, and the aura fault may be related to him. Ji Mo said solemnly: "Lao Zhao must not say this to outsiders. ”

Uncle Zhao's expression was grim, he nodded vigorously, and said solemnly: "The old slave knows." ”

Ji Mo was relieved, since Uncle Zhao said his position, Ji Mo naturally believed that he would keep his mouth shut.

It's not that Ji Mo is making a big fuss, but this kind of thing is too unbelievable, and Ji Mo subconsciously feels that he can't let others know about it.

Sometimes, it's right to show off your son, but if your son is so good, so good that it's unbelievable, and then you can show it off, and disaster may happen.

The reason is very simple, the husband is not guilty.

Ji Mo is not stupid, he naturally understands this truth.

Inside the room, Ji Yun had already sensed the presence of Ji Mo and Zhao Bo outside the room.

However, at this moment, he didn't have time to take care of the two of them, because his cultivation was about to break through.

At this moment, Ji Yun's sea of qi had changed greatly.

The original gas-like aura in the sea of qi became viscous at this moment, and there was a tendency to turn into liquid.

The spiritual power continued to be injected, and soon Ji Yun's sea of qi was filled.

Immediately after, without any obstacles, Ji Yun's aura changed, and he naturally broke the cultivation barrier.

Soon, a coercion unique to the Foundation Building Realm was instantly released.

Outside the house, Ji Mo and Zhao Bo felt this breath, and their expressions were stunned, and a look of joy flashed in their eyes.

"The young master has broken through!" Zhao Bo said in a lost voice.

"The foundation has been built! Yun'er has built the foundation!" Ji Mo felt that he was dreaming, Ji Yun had really succeeded in breaking through to the foundation building realm.

However, soon, they became confused, because after Ji Yun broke through, instead of stopping, he instantly placed pills on the table.

"Yun'er, what are you going to do?"

They didn't know that Ji Yun was planning to condense the martial arts foundation in one fell swoop.