Chapter 70: Joint Refining
More than an hour later, Yun Hao and Xin Ruyin returned to Yunwu Mountain. The reason why they spent nearly half more time on the journey this time was because they were worried that the old man surnamed Yin would follow them, so they deliberately took a detour before returning to Yunwu Mountain.

After the two came back, they rested for a while, and then Yun Hao took out all the materials for refining the formation flags and formation plates.

Xin Ruyin also took out a ball of silk thread. According to Ruyin, this ball of silk thread was the spiritual silk spit out by the second-level demon beast-level spiritual insect, the Sky Silkworm. It was left by her grandmother and was specially used to refine formation flags.

Xin Ruyin handed the ball of silk to Yun Hao, blinked and said, "Husband, this time we need more spiritual silk to refine the formation flag, you can take it and copy more!"

Yun Hao took the ball of silk thread from Xin Ruyin's hand, nodded and said, "Leave it to me. Don't you still trust me?"

Then the two of them walked to the room where Xin Ruyin specialized in refining formation flags and formation plates and began to refine them.

Yun Hao first took out the Divine Crow Cauldron and threw it on the ground, then placed the necessary materials one by one in order.

Then he made a pinch of the magic spell in his hand and shot out a ball of foundation-building true fire unique to foundation-building cultivators, which was injected into the cauldron. Then he threw the small Xuanhuang stone into the cauldron and began to smelt the small Xuanhuang stone.

What Yun Hao didn't expect was that it took him a full half month to melt this Xuanhuang Stone into stone marrow. The amount was so small that it was almost invisible to the naked eye, but with the feedback from his spiritual sense, it still did not escape Yun Hao's discerning eyes.

During the refining process, Yun Hao continued to take pills to restore his magic power and copy the ball of Tiansi silk thread given by Xin Ruyin.

After smelting the Xuanhuang Stone, Yun Hao continued to put diamonds into the cauldron and continued to refine them.

Although diamond is called diamond, it is far from being as strong as the black yellow stone. The diamond melted in just one day.

After the diamond melted, Yun Hao threw a ball of silk thread into it, and under the guidance of magic power, the silk threads quickly intertwined and soon formed a triangular silk handkerchief.

Xin Ruyin, who was standing aside, used her magic power to outline the formation runes, and hit them onto the formation flags in the cauldron.

Yun Hao then quickly condensed the marrow of the Xuanhuang Stone and the diamond into an array pole.

Just when the formation flag was about to take shape, Xin Ruyin had already used forbidden runes to form a formation diagram.

"Husband! Now!" Xin Ruyin shouted to Yun Hao anxiously after doing everything.

Upon hearing this, Yun Hao made a hand gesture and saw the flagpole and the flag in the tripod quickly merge into one.

Yun Hao breathed a sigh of relief when he saw that the refining was successful. All that was left was to slowly nurture it for a few days.

Just like that, three days later, the first earth-type formation flag was finally refined.

Yun Hao slapped the Divine Crow Cauldron with his palm, and the lid of the cauldron rose into the sky, and a small khaki flag came into view.

Yun Hao made a gesture to collect the treasure, and the small flag flew towards Yun Hao's hand very smartly.

As soon as the formation flag was retracted, Yun Hao's arm sank, and the formation flag was about three inches in size, dark yellow in color, with wisps of dark yellow energy flowing on the formation flag, flickering.

Xin Ruyin was overjoyed when she saw it, and exclaimed: "This is the best of the top-level magic tools!"

Yun Hao couldn't help but roll his eyes when he heard this, thinking to himself: "This has been added with Xuan Huang Stone, it is possible to refine a magic weapon, not to mention the best of the top-level magic weapons!"

"Just by adding a little bit of Xuanhuang Stone in it, this formation flag weighs twenty to thirty kilograms. If it is made of Xuanhuang Stone alone as the main material, I wonder what kind of attack power it will have when it is used to refine a bell or a seal!" Yun Hao imagined in his heart.

Yun Hao put away his thoughts, put the earth element flag into his storage bag, and rested for a day. First, he needed to recover his mana; second, refining this earth element flag for more than half a month made him feel exhausted physically and mentally.

The next day, Yun Hao and Xin Ruyin, who had recovered, continued refining.

It was not until two months later that Yun Hao and Xin Ruyin finally walked out of the refining room. They finally achieved their wish and refined the five formation flags and formation plates one by one.

It was not all smooth sailing. The refining of the other several formation flags was relatively smooth, but when it came to the stage of refining the formation plate, due to the need to reverse the five elements, the refining was not very smooth, and the refining process frequently made mistakes. If Xin Ruyin had not reacted in time and helped to refine it, Yun Hao would have probably ruined the formation plate. However, Xin Ruyin was busy carving the formation talismans to construct the formation, and helping to refine the formation plate. For a while, she was so busy that she was sweating profusely.

After packing up the formation flags and plates, the two returned to their bedroom and had a good rest for two days.

The next step is to wait for Mr. Yun to come out of seclusion and for the March deadline to arrive.

Yun Hao also began to prepare for this treasure hunt. He first used the silk of the Tiansi silkworm given by Xin Ruyin to refine it into a rope. Then he asked Xin Ruyin to carve a simple formation connected by Qi on the rope. He then connected nine Tianlei seeds together to form a bracelet made up of Tianlei seeds.

Since the Tianlei Zi are connected to the Qi, just slightly pushing the rope can detonate the nine Tianlei Zi on the bracelet at the same time.

When Yun Hao thought about the scene of nine heavenly thunder bombs exploding at the same time, he shuddered. Even a Jindan-stage cultivator would not feel good if he was hit by such a bomb.

Yun Hao made three such bracelets in the remaining days before he stopped.

Time passed quickly, and in the blink of an eye, the March period was about to arrive.

That day! Yun Hao saw that Mr. Yun had not come out of retreat yet, so he sent a sound transmission note to Mr. Yun. Yun Hao muttered a few words to the sound transmission note, and then the sound transmission note turned into a flame and sank into Mr. Yun's room.

At this time, Old Man Yun, who was in seclusion, was sitting cross-legged on the bed practicing. Suddenly, his spiritual sense sensed a sound transmission note flying in.

Old Master Yun waved at the flame, and after it flew into his palm, Old Master Yun squeezed it hard, and Yun Hao's voice suddenly came out from the flame.

"Grandpa! The time has come. It's time to come out and meet up with Fellow Daoist Yin and the others!" Old Man Yun listened to Yun Hao's voice.

The old man thought with some regret: "Is the time up? Sigh! If only I could have another two months, I would be able to break through to the middle stage of foundation building in just two months..."

But the old man had no time to think about it, he just stood up and walked out of the house.

As soon as Mr. Yun came out, Yun Hao stepped forward and called out, “Grandpa, how is it!”

Old Master Yun sighed and said, "Alas! There is not enough time. There is no other way. This is the only way!"

Yun Hao also felt a little regretful after hearing this.

Xin Ruyin, who was standing beside him, comforted him, "It's okay, Grandpa! Brother Hao has prepared a powerful treasure, which should be able to guarantee our safety."

When Mr. Yun heard this, his eyes lit up and he asked impatiently, "Oh! What treasure is that?"

At this time, Yun Hao took out two bracelets made of Heavenly Thunder Seeds and gave one to Grandpa Yun and Xin Ruyin respectively, saying: "This Heavenly Thunder Bracelet is made up of Heavenly Thunder Seeds and Ruyin's formation. There are a total of nine Heavenly Thunder Seeds. If they are activated at the same time, even a master in the Golden Core Realm would not dare to take it head-on!"

Mr. Yun was delighted to hear this. He took the bracelet and began to explore it lovingly.

Xin Ruyin also took the Tianleizi bracelet from Yun Hao's hand and put it into the storage bag.

Yun Hao's face darkened immediately when he saw Grandpa Yun couldn't let it go. You know, this was the first time he made it like this, and the stability was not guaranteed.

If Mr. Yun accidentally triggered it, their entire family would be finished.

Yun Hao hurriedly said to Grandpa Yun: "Grandpa, put this Sky Thunder Bracelet away quickly. This is the first time I have refined it this way. If it explodes, we will all be reduced to ashes..."

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(End of this chapter)