The eighth layer of the Fire Domain, where the colorful mist is shrouded, looks quiet and peaceful.

But that terrifying heat was like a surging river, pouring directly into the seventh layer, like using heaven and earth as a copper furnace to refine everything in the world. Even Zhou Tong felt that his whole body was hot and unbearable, as if he was about to burn.

Even the Ten Cave Celestial Rings could not completely block this terrifying heat.

Taking a deep breath, Zhou Tong marched towards the eighth layer of the Fire Domain without hesitation.

"Hmm!!"

As soon as he came in, Zhou Tong suddenly snorted, and he felt a little unbearable. He immediately took a sip of the fountain, which dispelled the burning sensation a lot.

Here, the colorful mist is shrouded, not very dense, but there is an amazing temperature.

This is the eighth layer of the Fire Domain, this place can't even enter the top Saint Lord level, and the true body of the Emperor Lord can be refined into ashes. But Zhou Tong relied on his special physique, the unique Ten Cave Heavenly God Ring, as well as the White Tiger Divine Medicine and Bodhi Zi Body Protector, and walked in.

"This is it!"

Not long after walking, Zhou Tong also felt that he had almost reached the limit and could not move on.

This time, he was not as fierce as before, directly absorbing the flames wantonly, but very carefully, little by little, wisps by wisps.

For half a day, Zhou Tong collected enough flames.

At this moment, in the Ten Caves Heavenly God Ring, the piece of eternal blue gold was once again bathed in flames, but this time the flames were colorful colors.

The "instrument" must be refined in the body, so that it can be integrated with the body, there is no other way, only in this way can the strongest power be exerted.

And the Vajra that Zhou Tong was going to refine was not for himself, but for the Ten Cave Heavenly God Rings.

Therefore, the best way to refine this artifact is to place it in the Ten Caves Heavenly God Ring to refine it.

Zhou Tong sat quietly on the ground of the eighth layer of the Fire Domain, his heart was quiet, and the appearance of a vajra appeared in the sea of knowledge, brilliant as a star, crystal clear and shiny.

This is the vajra in his heart, and it is also the appearance of the perfect match with the Ten Cave Heavenly God Ring, everything must be tempered according to this form until it is formed, and there must not be a trace of mistakes and flaws.

Colorful flames surged, enveloping this piece of eternal blue gold. Zhou Tong used his mind as a hammer and kept forging it.

Boom! Boom! Boom! ……

In the Ten Caves of the Heavenly God Ring, this piece of eternal blue gold emitted a continuous sonorous sound, as if it was really striking iron.

Time passed day by day, and in the blink of an eye, the colorful flames that had been absorbed before gradually extinguished.

At this moment, that piece of eternal blue gold had been forged into a "round cake" shape by Zhou Tong.

He continued to absorb the flames, and the colorful mist gathered around the Eternal Blue Gold little by little, burning continuously, and the Eternal Blue Gold also softened little by little.

"Buzz!"

The Ten Cave Heavenly God Ring beside Zhou Tong suddenly rotated, and at the same time, as if corresponding to the movement of the Ten Cave Heavenly God Ring, the piece of eternal blue gold "round cake" wrapped in colorful flames also rotated at the same frequency.

And as it rotated, it could be seen that in the center of the "cake", it was gradually burned through, and the melted eternal blue gold also rotated, quickly piling up around.

Boom! Boom! Boom! ……

The sound of striking iron came out again, and Zhou Tong concentrated, concentrating his spirit and spirit, tempering the eternal blue gold, and letting it slowly transform into shape.

"Boom!!"

At this time, the Spirit of the Thunder Emperor, who had been sitting in the Ten Caves Heavenly God Ring, also moved, and countless mysterious symbols turned into lightning and struck on this Vajra Stone.

"Zheng!!"

At the same time, the sword roared, and the spirit of the nine-leaf sword grass also shot along with the Thunder Emperor, and the sword qi was like a wave of rage, carrying countless simple and brilliant symbols to drown King Kong Zhuo.

……

With the attack of the Thunder Emperor and the Nine-Leaf Sword Grass, this time the refining was faster, and in just three days, the colorful flame was extinguished again.

"Eternal blue gold is worthy of eternal blue gold, it is definitely the most difficult to temper among all immortal gold!" Zhou Tong sighed silently in his heart, and then he continued to sit here and continue to collect the colorful flames here.

This time he had gathered far more flames than before, and he was already approaching the limit of his suppression.

In his Ten Cave Celestial Rings, there seemed to be a small colorful sun, and in the middle was an eternal blue gold that was constantly rotating.

Colorful flames burned in the Ten Cave Celestial Ring, constantly tempering the eternal blue gold, and the sonorous sound was endless.

The Thunder Emperor and the Nine-Clover Sword Grass also evolved symbols at the same time, and continued to imprint them into the Eternal Blue Gold, promoting their further growth.

For the next period of time, Zhou Tong has been sitting here, constantly connecting with the colorful flames of the outside world; It wasn't until three months later that the sonorous sound stopped.

At this moment, in the Ten Caves Heavenly God Ring, a blue Vajra Diamond turned into a shape, as brilliant and beautiful as the starry sky, especially in the center of this Vajra Stone, it was more like a black hole, encroaching on the essence of the eight directions.

It is densely covered with patterns and symbols, such as thunder and swords, which are runes that belong exclusively to the Thunder Emperor and the Nine-Leaf Sword Grass. These runes are intertwined in the vajra to evolve "Tao" and "Reason", and there is a body together, faintly having the feeling of the beginning of heaven and earth and the nature of Taoism.

"Good!"

Looking at this vajra, a trace of joy flashed in Zhou Tong's heart, he poured a trace of divine power into it, and suddenly the blue crystal-like vajra shone brightly, almost shining on the nine heavens and ten earths, it was too gorgeous, and it was surrounded by boundless symbols.

"Sure enough, it echoes my Ten Cave Celestial Ring...... I can feel that this diamond is also opening up a small world! Zhou Tong grabbed his right hand in the air, and this King Kong suddenly appeared in the palm of his hand.

The blue diamond is worth tens of thousands of catties.

Zhou Tong shook his hand violently and threw King Kong out, and suddenly lightning and thunder roared, making a terrifying roar, like a blue lightning bolt breaking out of the sky, and the speed was amazing.

"Click!"

With a soft sound, a boulder on the eighth layer of this fire domain was directly pierced by King Kong.

The most amazing thing is that when it passes through, there is not much sound. It's like a sword breaking through the air, there is no resistance, so it's silent.

"Whew!"

Zhou Tong raised his palm, and the flying King Kong suddenly turned into a blue light and returned to the palm of his hand.

He grabbed King Kong Zhuo, his palm shook slightly, and suddenly a brilliant blue light swayed out.

This was not light, but sword qi, and the sea-like sword qi directly submerged a large area in front of him.

"This Vajra also combines the Thunder Emperor and the Nine-Leaf Sword Grass Treasure Rune, and it can easily perform the Thunder Emperor's Treasure Technique and the Nine-Leaf Sword Grass Treasure Technique...... In the future, it will be interesting to integrate all the Ten Fierce Treasures! ”

"My bell is a heavy weapon, not to be moved, the next diamond may be able to be used as my 'instrument' in the eyes of the world, once faced with a strong enemy, the bell can play a role in surprise." Zhou Tong smiled slightly, and re-incorporated King Kong into his Ten Cave Heavenly God Ring.

"Next, it's the real thing, Ba Zhong! My clock has to be formed here! Zhou Tong did not leave here directly, but continued to practice here, and he wanted to completely shape his overlord bell.

His overlord bell is now just a combination of Dao patterns, and it has not yet fused that piece of divine trace purple gold into it.