This is really impossible.

If it is a normal practice, it will take three months to half a year for Yuzhi Boxuan to do it.

However, because Yuzhi Boxuan got Huoyuan Dan from Huoshen zhurong before, he has gradually integrated Huoyuan Dan into his body, and he has fire himself.

This has already had an effect on his body, so he is practicing the firefly formula at such a fast speed.

However, Yu Zhibo Xuan himself did not understand this reason, nor did Taiyi immortal.

"You have practiced very well, but now it is only preliminary. You need to continue to practice and strengthen your firefly formula." Taiyi said.

"Yes, elder martial brother, what's the way to speed up the strengthening?" Yu Zhibo Xuan asked.

Taiyi immortal thought: "if you can practice by the strong flame, it will be better."

Yu Zhibo Xuan also understood.

He practiced his firefly formula in front of the golden light cave, and at the same time, a fire broke out nearby.

It's no good to copy the whole set to Nezha's eyes.

After walking out of the golden light cave, Nezha was very surprised to see Yu Zhi Bo Xuan practicing firefly formula.

"Brother Xuan, do you practice so fast? Or did I copy it for a long time? " Nezha came and asked.

Yu Zhi Bo Xuan said with a faint smile: "I have just practiced."

Nezha admired Yuzhi Boxuan. He also knew the power and difficulty of the firefly formula.

He did not practice the formula of firefly, because immortal Taiyi said that Nezha was not suitable for practicing this.

Nezha was not in a hurry to return to heaven, so he stayed in Jinguang cave to practice with Yuzhi Boxuan. Both of them had a happy life.

"Brother Xuan, if you want to strengthen the power of the firefly formula, we can go to the sky fire peak."

This day, Nezha said to Yuzhi Boxuan.

"Sky fire peak? What is that place? " Yu Zhi Bo Xuan felt familiar with him. He seemed to have heard of it somewhere.

Nezha: "Tianhuo peak is a peak of Kunlun mountain. It is said that there was a fire coming there, so it is called Tianhuo peak. Although it has been countless years, there is still hot fire there, and there is no living creature on it. It is bare."

"Although no one lives there, practicing on it will help your firefly formula."

Yuzhi Boxuan was naturally willing to go when he heard that there was such a good place to go.

They left the main peak of Kunlun Mountain and headed for Tianhuo peak.

Tianhuo peak is in the southernmost part of the Kunlun Mountains and is also a marginal zone.

After they came to the surrounding area of Tianhuo peak, they saw that the fire peak was black and there was nothing.

Before he got close to the sky fire peak, Yu Zhi Bo Xuan felt the heat on the top of his face. His smile was very helpful to his cultivation.

"Are you going too?" Yu Zhi Bo Xuan looked at Nezha and asked.

"Yes, I can make my wind fire wheel more powerful, not to mention I have my torch." Nezha waved his gun.

Two people join hands to enter as long as the sky fire peak, practice on this.

After practicing for a few days, the two of them walked on the fire peak of the day. On the mountainside, they found a cave. The cave was not affected by anything. If you enter the cave, you can feel the cool, especially cool and comfortable.

Both of them breathed a long breath after entering the room. They felt very comfortable and comfortable.

"Where is this cave? Why is it so cool? " Yu Zhibo Xuan asked.

"It's also the first time I've seen this cave. I haven't walked here before." Nezha looked at the cave and said.

Yuzhi Boxuan observed the cave. He found that there were many strange lines on the wall of the cave. He didn't know what it meant.

Then he quietly walked over and touched the lines. When his hand touched these lines, they even sparkled.

Nezha felt strange and reached out to touch it, but there was no light shining when he touched it.

"Why is that?" Nezha didn't understand.

Yu Zhi Bo Xuan also did not understand. When he touched these lines, he felt a hot air flow in his body, and then the lines gave out light.

"Is it because of huoyuandan of Huoshen?" Yu Zhi Bo Xuan thought in his heart.

In Yuqing palace, Tianzun and the leader of Tongtian sect stand at the railings in front of the hall.

"Elder martial brother, now Yuding takes Yuzhi Boxuan to Taiyi to learn the formula of firefly. Now he and Nezha have gone to tianhuofeng."

The leader of Tongtian sect said, "what do you think will happen? After all, there is a certain danger on the sky fire peak

Yuanshi Tianzun looked at the sky: "there will be danger."

The leader of Tongtian sect was surprised: "shall we go to save it?""Look at their nature." At the beginning of the Yuan Dynasty, Tianzun lightly said a word, then turned and walked into the hall, and the leader of Tongtian sect followed him in.

Yuzhi Boxuan and Nezha were practicing on the fire peak of the day. He found that he was practicing the firefly formula on the Tianhuo peak, and the progress was really fast. Now the power of the firefly formula has been enhanced a lot.

At the same time, Yu Zhi Bo Xuan also found that the hot power in his body gradually became stronger, and he came in as if he had been revived, running around in his body.

Sometimes Yuzhi doesn't control it.

"Brother Xuan, do you think it's getting hotter and hotter on the sky fire peak?" Nezha went to Yuzhi Boxuan and asked.

Yu Zhibo Xuan felt for a while, and did not have any feeling: "I think it's almost the same as when we first came."

However, Nezha shook his head: "it is absolutely different. The temperature on the fire peak is much higher than when we came here."

Yu Zhi Bo Xuan looked around him. He didn't know why, but he couldn't feel it.

He also wanted to talk, but found that his body that hot power, and rapid movement, this time he is really out of control, in his body around the chaos.

At this time, the blue sky is a little bit red, it seems that something is falling.

On the Kunlun Mountain, many experts have noticed this, and their eyes are shocked when they look at the gradually red sky.

Immortal Yuding was reading in the cave. He felt a little wrong and ran out. Seeing the air, he was shocked and ran to Taiyi immortal.

Taiyi immortal is also outside his cave, looking up at the sky.

"What's the matter, elder martial brother?" Jade Ding immortal asked.

Taiyi immortal frowned: "I don't know, why does the sky change?" ..

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