Out of the dust came an elderly figure, with a fluttering white beard and a white robe, revealing a majestic atmosphere.

This person is the old man who taught Bai Yunfei the phantom technique outside the woods of Chang'an City-Ouyang Jian.

"Division...... Master. Bai Yunfei exclaimed, how could Ouyang Jian appear here.

"Yunfei, your master can beat this demon beast. The Shadow asked.

"I don't know, after all, I haven't seen Master make a move. Bai Yunfei said.

The demon beast looked at Ouyang Jian with hostility, and at the same time condensed more than a dozen explosive bombs, warning Ouyang Jian not to interfere.

"Evil animal, you have harmed the lives of countless people in my Chang'an, how can the old man tolerate you!" Ouyang Jian spread his hand, and the silver sword was attracted by the internal force, pulled out of the rock, and returned to Ouyang Jian's hand.

Boom Boom!

The venom bomb smashed into Ouyang Jian like a meteor shower. Ouyang Jian suddenly burst out of silver light all over his body, dodging these explosive bombs.

"Yuan Baby, this is Yuan Ying Realm!" the Shadow exclaimed.

The immortal level is a big realm, once you step in, it is completely different from ordinary people, and the whole body glows, which is an ability of the Yuan Infant Realm.

"Phantom!"

Four phantoms appeared from different directions, and then pierced the monster's body at an extremely fast speed.

"Roar, roar, roar!" The demon beast desperately attacked, but Ouyang Jian's speed was so fast that he couldn't see it, so he could only fight indiscriminately.

In a few moments, the monster beast was wounded in dozens of places on its skin.

Bite!

As Ouyang Jian slashed out, the demon beast was beaten upside down and flew dozens of meters and smashed to the ground.

Ouyang Jian frantically instilled internal force into the sword, urging the mystery of gold and stabbing at the demon beast.

The head of the demon beast was stabbed by Ouyang Jian, and the demon beast was killed.

After a period of rest, Bai Yunfei and Shadow had almost recovered, and they stepped forward.

"Thank you, Master!" Bai Yunfei clenched his fists.

"No thanks, for the sake of the people of Chang'an, after my investigation during this period of time, it is not difficult to treat this strange disease, and it can be cured with the energy in this demon beast crystal, according to the current number of people, it should be enough." Ouyang Jian said.

"Don't worry, Master, the apprentice will definitely complete the task!" Bai Yunfei clenched his fists and promised.

After Shadow helped Bai Yunfei take out the magic crystal, he told Bai Yunfei that he might not come out in the near future, because he had killed demon beasts and demon path cultivators many times, and some of them had attracted the attention of the Demon Sect, so this time he was going to Shadow Mountain to personally find the whereabouts of Shennong's knife.

Bai Yunfei used his internal force to draw out the magic crystal energy, and then attached it to the herbs and fed it to the people.

The healing effect of this herb is very good, and with the energy of the magic crystal, it is a matter of minutes to heal a person.

"Thank you Shaoxia, thank you Shaoxia!" everyone kowtowed to Bai Yunfei to thank him.

"Everyone, hurry up, please help me get these pills out. Bai Yunfei said.

"Okay, listen to the young man!" everyone responded.

Bai Yunfei returned to Chang'an City with the magic crystal, and after giving the token to the soldiers defending the city, he walked all the way to the mediocre medical hall.

"Ouch~hey!" the people in the hospital screamed in pain.

"Come, brother, eat this!" Bai Yunfei handed the magic crystal enchanted herb to an uncle.

"One for each of you, this herb will cure you of your disease. Bai Yunfei said as he sent the herb down.

"Shaoxia, can this really cure our disease?" said a patient with a yellow face and thin muscles.

"You'll know when you eat it. Bai Yunfei replied.

"Dr. Ping, and yours. Bai Yunfei handed a medicinal herb to mediocrity.

"Okay, okay, my illness is cured. One patient rejoiced.

"I'll take the pulse. Banity touched the patient's pulse.

"Yes, it's good. Mediocre smiled.

Immediately afterwards, the red spots on the bodies of one patient after another have dissipated.

"Yunfei, I'm ashamed of your medical skills!" meadow sighed.

"No, Doctor Ping, I can't do this kind of thing, it's just that this epidemic is caused by demon beasts, and I just use the energy of the magic crystal to fight poison with poison. Bai Yunfei explained.

But then again, mediocre medical skills are indeed superb, and those who are generally infected die in three days, but there are no dead people in the mediocre medical hall for half a month.

After half a day, the condition in Chang'an City has stabilized, Bai Yunfei extracted two-thirds of the energy in the magic crystal, made more than a dozen carts of medicinal herbs, and handed them over to Pingyong, so that Pingyong can solve the condition outside Chang'an City.

The disease itself is not contagious, but is only caused by the control of demon beasts.

Next, Bai Yunfei began to refine the energy in the magic crystal.

In the south of Shu, in a palace surrounded by black gas.

"Waste! Even the infectious disease released by a demon beast can be treated, what's the use of asking a few of you!" the Dark Protector yelled at a group of black-clothed demon soldiers.

"Protecting ...... Dharma protector, this can't be blamed on the small ones, we can only blame the demon beast plague demon, I didn't listen to the persuasion of the small ones, and went straight to Chang'an City, but I was killed by the cultivators who had been ambushed in advance, and used the magic crystal to disperse the epidemic, we have failed!" explained a demon soldier.

"Who is that cultivator?" asked the Dark Protector.

"Back to the Dharma Protector, this person's name is Bai Yunfei. The demon soldier replied.