"Adamantine."

"Mithril."

"Magic weapon."

"Magic circle."

"Then we can break through?"

Master Chongyang looked through the volumes of notes and couldn't believe it: "It's so easy?"

"easy?"

Cao Xin smiled bitterly.

First this, then that, then this and this—

Ah!

It's easy to say.

But it is too difficult to actually do it.

Not to mention anything else.

It’s Cao Xin’s current preparations——

Ordinary instruments.

Various raw materials.

This alone took him six years.

On the beam.

In the original fairyland.

Cao Xin mobilized countless manpower and material resources to search, and finally managed to build the foundation.

But for now——

"I tried for nearly a year to solve the problem of flame temperature."

"Further back."

"There is no progress in refining 'Adamantine'."

"There are seventeen processes in refining 'Mithril', and the best one only advanced to the sixth process."

"There are too many difficulties!"

"Every step is difficult!"

This is also the reason why Cao Xin is eager to recruit Chongyang Zhenren into his group.

Real people are mature and prudent.

Internal strength is perfect.

Maybe you can make faster progress in the 'Hundred Refinements of Divine Machinery'.

Except him——

Even a grandmaster cannot meet the minimum requirements of the 'Divine Machine Hundred Refining'.

Not to mention anything else, just the threshold of internal strength blocks all the masters from the door!

…

boom!

On Wanshou Island, there was a roar.

Wei Feifei looked at the mountains and was used to it.

In the past year, Cao Xin and Chongyang Master opened caves, conducted experiments again and again, and experienced explosions again and again.

It has become the norm.

She was too lazy to count.

As for Cao Xin’s safety——

Every time there is an explosion, I have seen the embarrassment of Master Chongyang, but I have never seen Cao Xin injured at all.

Over time.

Wei Feifei didn't have any trouble anymore. She took one look and continued practicing her sword against the waves.

island.

In a cave on the top of a mountain.

boom!

Chongyang Master lifted up the earth and rocks, his clothes were torn, his shoes were torn, and the skin on his face was scorched black.

After him, Cao Xin came out.

She is still a beautiful woman in troubled times, except for being stained with a little dust, there is no change.

"Only one person will be killed each time!"

Master Chongyang had a good temper. Seeing that Cao Xin was almost spotless again, he smiled bitterly.

"I have to protect the instrument."

"Otherwise, the imperial treasury will not be able to sustain it with such an explosion."

Cao Xin shook his head.

A whistle summons the divine eagle.

Gu Gu Gu~

The eagle muttered something unknown, and its face was covered in hair and you could tell it had a dark face. However, forced by Cao Xin's power, he still obediently went aside to dig a cave.

The eagle's claws are like iron, digging.

The wings are as strong as steel.

Tsk tsk tsk!

Bang bang bang!

Not long after.

A brand new cave was excavated.

Then he shook "Nanming Xuan Gong" and rolled on the spot in the cave, and all the moisture in the cave was eliminated.

"Hard."

Cao Xin and Master Chongyang were reviewing the experimental process just now. When they saw that the cave was dug, they drove away the sacred eagle. Then they entered the cave with Master Chongyang and took out the long table, equipment, materials, etc. that had just been put away in a panic.

Once set up.

Seeing Cao Xin's move.

Master Chongyang smiled and said: "Without your magic of 'knowing the world within your sleeve', I really can't afford to delay."

Gold and silver are easy to talk about.

But various materials and instruments are not so easy to recreate.

Fortunately, Cao Xin took it away every time it exploded.

but--

"It's not okay to keep doing this."

"This 'Thunder Sound Fiery Array' is not easy to set up, and each component is difficult to refine. It always becomes useless after three or five times. It is a pity and a waste of time."

Master Chongyang frowned and thought while rearranging the instruments.

Thunder Sound Fire Array!

This is Cao Xin's native method of solving the flame temperature. He learned it at the fourth observation point - the alchemy room of the northern tower. He uses common metals such as gold, silver, copper and iron, and mixes them in special proportions to build corresponding formation patterns and refine them.

By forming corresponding modules, putting them together and instilling internal force, you can greatly increase and flexibly control the flame temperature.

It can be regarded as a beggar’s version of the ‘Five Fire Red Atmosphere Formation’.

The advantage is that the materials are common.

However, the magic circle is rough and extremely unstable, and it is not easy to refine.

It took Cao Xin nearly a year to master the refining method.

However, in terms of stability, it is really unsatisfactory.

but.

even so--
To be continued...