Han Yun faced the ridicule with a calm face, he also wanted to fight himself, but his identity and strength were not enough. It's better to be more stable, Xu Xiaoyan will fight, and he will provide backup support.

"Steward Jin, may I ask who Zhao Feilong is. Han Yun asked.

"His father is Zhao Shengyun, the deputy peak master of Wanling Peak. My sister is Zhao Feixue, one of the top ten candidates for Tongtian Peak, and she is under the tutelage of Taishang Elder Yu Nancheng. The golden steward paused for a while when he said this, and reminded kindly: "The deputy head can overpower Zhao Shengyun, but he can't overpower Yunancheng, don't make trouble to the Taishang Tailao Yunancheng." ”

Han Yun also wanted to ask why he mentioned Lin Xuanyu, the deputy head. But the golden steward was reluctant to say superfluous words, and after he handed over the token of the cave mansion to the three of them, he had the meaning of sending off guests behind closed doors.

Out of the hall of the cave mansion, Han Yun contacted Qian Youyuan.

If Han Yun knew enough about this fat man, he would find that the fat man was really afraid of Qin Tianyue and Qin Tianyi. Wherever there are twins of the Qin family, the fat man will not appear, not even Wan Lingyu. If he and the Qin family twins appeared at the same time, then they must be playing some bad idea.

The sound transmission magic device was given by money, and in this era when there was no mobile phone, Han Yun happily accepted this thing.

"Brother, are you finally going to sell the spirit runes?"

"No, Xiaoyan is going to duel with Zhao Feilong tomorrow on the cloud platform, ask if you have any ideas. ”

Qian Youyuan was lying on a Taishi chair and was free, and after listening to it, he immediately turned over and sat up, and said excitedly: "Understand, say what you want directly, I have already seen that grandson is not pleasing to the eye, and I am afraid that I will not be able to beat his sister." ”

"I have an immature idea, but I need a lot of formation materials, you can help me prepare it, and the cost will be deducted from the future share. ”

"No problem, wrap it on me, you turn on the positioning of the magic weapon, and I'll send it to you when I'm ready. ”

Han Yun listened to Qian Youyuan's excited tone, reported the materials with a strange face, and then said to the two women, "Let's go back to the cave house to prepare first." ”

With that, he turned on the auto-follow mode.

Han Yun opened the Book of Eternity, and he looked at the daily task of refining a magic weapon, and he felt quite speechless.

The setting of daily tasks is simply unreasonable, he is in the world of cultivating immortals, hey, it is possible that a few years will pass with a closed eye, so how many daily tasks cannot be completed.

"The unfully awakened book spirit has received your suggestion, and we are working on a revision of the Daily Quest system. ”

A milky voice suddenly sounded in his head, almost startling Han Yun, it turned out that this thing still had a book spirit. But it's not surprising to think about it, all spiritual weapons may have instrument spirits, let alone the tablet-like book in his hand.

It's a good thing to be able to receive advice. Han Yun felt that there were too few ways to obtain Eternal Value now, and he could still obtain Spirit Points through the Treasure Vault.

"Regarding the acquisition of eternal value, it is recommended that you be promoted to the top ghost soldier as soon as possible, and the way to obtain it will be increased for you at that time. ”

"Shuling, when did you awaken, do you have a name?"

"After completing the next main story, I can be semi-awake, time is running out, take care of the host. ”

Shu Ling hurriedly finished saying this sentence and was silent, Han Yun recalled the milky host to take care, and suddenly had a strong sense of direct view of the system flow.

It's just that this system is not very easy to use, especially talismans, alchemy, refining, formations, and so on.

It only provides knowledge, not proficiency.

Although he has learned this skill, he still has to rush the proficiency himself.

Soon after Han Yun returned to the cave mansion, Qian Fatzi had already prepared the materials and flew over. He flew through the air, feeling more and more that something was not right.

"Isn't this the exclusive three caves of the deputy master?"

Qian Youyuan muttered in his heart, and only after seeing the shadows of Han Yun and the three of them did he fly over with confidence and landed lightly in front of Han Yun.

Han Yun took the space ring handed over by Qian Youyuan, took three ordinary array flags from it, wrote a rune each, and put the three array flags into the lake not far from the cave mansion.

If you have array flags and runes, you only need to know a little bit about the formation to put out a simple magic circle.

Han Yun's magic circle is also very simple, it is used to make oxygen and hydrogen, similar to the chemical reaction of electrolysis of water. (Chemistry bosses, don't be serious)

When the formation is formed, you can see thunder flashing at the bottom of the lake, and bubbles are constantly bubbling up.

Han Yun wrote two thunderbolt runes and an isolation rune into the formation flag, and then added the effect of the array flag itself to create a formation that slightly isolated the space.

The strength of the spatial isolation is not great, like a thin film, but it is enough to collect oxygen and hydrogen and separate them proportionally.

"What's the use of this formation?"

Qian Youyuan observed for a while, and no matter how he looked at it, he felt that this formation was of little use.

The speed at which the formation method extracted oxygen and hydrogen was much faster than Han Yun expected, and when he saw that it was almost over, he asked Qian Youyuan, "Do you know fire spells?"

"A little. ”

"You stand here and use a fireball. ”

Han Yun pointed out a position for Qian Youyuan and motioned for him to stand in.

Qian Youyuan saw that Han Yun was quite sure, and he was curious about the unknown, so he stood in according to Han Yun's instructions.

"Huh...... It felt much more comfortable than outside. ”

Qian Youqian broke through a membrane, instantly discovered the change in the environment inside, said with some surprise, and then released the fireball technique.

When Han Yun saw that the flames of the fireball were blue, his worries finally let go. It doesn't matter what fireball is burning, as long as oxygen has a combustible effect on fire-based spells.

"Blue, much warmer. ”

Qian Youyuan noticed the change in the fireball technique for the first time, and then looked at Han Yun very incomprehensibly, wanting to ask for an explanation.

"Brother, you keep burning for a while. ”

Han Yun said, he turned around and pulled the two girls to run for hundreds of meters, and then used the magic weapon to transmit: "Activate your defensive magic weapon, and then throw the fireball ten meters in front of you." ”

Ten meters in front of you is the space where oxygen and hydrogen mix.

The flammability of oxygen is effective, so in a space where hydrogen accounts for nearly 70%, an explosion will definitely occur in the event of a fireball.

He couldn't predict the scope and power of the explosion, so he could only pull Lin Xiaoxian and Xu Xiaoyan away a little longer.

Qian Youyuan suddenly panicked, he activated the magic weapon to protect the body, and then looked at Han Yun hundreds of meters away, and felt that it was still not safe enough, so he withdrew from the formation space and threw the fireball technique.

The eyes of the two women kept staring at the fireball technique, and when Qian Youyuan withdrew, the fireball technique turned back to red, and when it was thrown in, it turned blue again, and when it passed through a membrane, it suddenly exploded.

It wasn't the fireball that exploded, but the hydrogen gas was ignited by the high-temperature fireball technique, and it exploded violently in a confined and oxygen-filled environment.

"Boom ......"

I saw that a mushroom-shaped flame rose into the sky within the coverage area of the formation, and at the same time as the explosion, a powerful impact was generated, directly flying the lake water and Qian Youyuan, and the land at the edge of the lake was instantly exploded.

The two women's eyes widened, not understanding what was going on.

It was obviously a simple fireball technique, how could it cause such a terrifying effect.

Han Yun also felt that the effect of this explosion was much stronger than he imagined, and the only explanation was that there was something called aura in the air.

Only with spiritual power can the spell be released, then the fireball technique should burn with aura.