The fourth fire domain was a black flame, but this heavy flame still couldn't help it.

Keep moving.

Soon the fifth fire domain arrived, and here it was a golden flame. When he arrived here, even Zhou Tong felt a trace of dry mouth, and the flames here could already affect him.

"But it's still not enough, the flames here are too weak, I'm afraid even if you let the Eternal Blue Gold burn here for a year or two, it will be difficult to melt!" Zhou Tong sighed lightly.

There are a total of nine types of immortal gold in this world, and each immortal gold has its own unique abilities. For example, once the phoenix blood red gold is refined to the extreme and the mystery of immortal gold is developed, it can be reborn like a phoenix; For example, if the Divine Mark Purple Gold Sacrifice is refined to the extreme, it can copy the patterns of the Great Dao between heaven and earth.

In the same way, Eternal Blue Gold also has such a fairy gold mystery.

The fairy gold meaning of eternal blue gold is above the word "eternity".

In layman's terms, eternal blue gold is the hardest of all immortal gold, and this immortal gold is also the most difficult to process among all immortal gold. Of course, this kind of immortal gold is also the most difficult to destroy and decay among all immortal gold.

You must know that even if it is immortal gold, if you stay in a place where the aura is insufficient, after tens of thousands of years, the immortal gold will rust and decay, and the spirituality will be lost, but only the eternal blue gold is an exception.

Once the Eternal Blue Gold was refined to the extreme, it developed the unique meaning of Immortal Gold. It is strong and immortal, and it can keep its spirit alive even in the depleted places!

This is the true meaning of eternal blue gold, and it is also the true meaning of the word "eternal".

"Keep going, the flame of the sixth purple qi coming from the east should barely be able to refine the eternal blue gold!" Zhou Tong continued to move forward, and soon passed through the area of the fifth golden flame and came to the sixth area.

The sixth fire domain, called Purple Qi Donglai, the flames here are not like raging fire, but like purple mist circulating, and it is hazy.

The sixth layer of the Fire Domain is the place where the powerful weapons are refined, and it is very quiet in normal times. There was a purple mist here, there was no sound, and there was no other scenery except for the stone forest with dogs' teeth.

Entering this heavy fire domain, Zhou Tong's face suddenly became much more solemn.

But he wasn't overly nervous, after all, this heavy fire domain couldn't help him.

"This Heavy Fire Domain is worthy of being a place for powerful refining weapons, this kind of flame ...... Amazing! Zhou Tong took a closer look at the surrounding flames, and then nodded.

With a casual grab, he sent a wisp of purple mist directly into his chakra sea.

"Boom!"

Suddenly, Zhou Tong's purple sea of bitterness rolled up boundless waves, blocking the purple fire and covering it inside.

Then, the purple flame was swept away by the purple sea, and it was submerged in one fell swoop, and it was about to be extinguished.

"Sure enough, as I expected, as a Heavenly Overlord at the same level as the Ancient Holy Body, I am naturally not afraid of these purple fires!" Zhou Tong nodded, and then immediately came to the hottest place in the "Purple Qi from the East" fire domain.

The fog was thick there, like an indissolvable liquid, and there were some humanoid ashes on the ground, and it was obvious that some big people had died here for the sake of refining weapons.

"Buzz!!"

Zhou Tong's mind moved, and his Ten Cave Heavenly God Ring instantly appeared.

The moment this divine ring appeared, the surroundings were suddenly blank, and those purple mist seemed to be afraid and did not dare to approach. In the area around Zhou Tong, there was no purple fire.

In an instant, Zhou Tong felt that the temperature around him plummeted.

"Are you afraid of my Ten Cave Celestial Ring?" Zhou Tong was stunned for a moment, but then he also understood.

Because these ten caves are connected into a divine ring, in essence, they are at the same level as the only cave heaven of the Emperor of the Desolate Heavens, and they are also at the same level as Zhou Tong's own wheel sea.

Since the purple fire was easily extinguished by the "water" of the wheel sea, it naturally could not help the Ten Cave Heavenly God Ring.

Moreover, there are still two treasures in his Ten Cave Heavenly God Ring, the White Tiger Divine Medicine and the Bodhi Seed, so naturally this kind of purple fire is even more difficult to get close to.

"It's time to start refining!" Zhou Tong quickly opened the most primitive function of the Ten Cave Heavenly God Ring.

"Whew!!"

Suddenly, the sixth layer of this fire domain seemed to blow a fresh wind, sweeping up the purple mist around it, and drilling towards the Ten Cave Heavenly God Ring together.

The essence of the Ten Cave Heavenly God Ring is actually still the Cave Heaven.

The function of the cave heaven was to absorb the essence of heaven and earth from the outside world, and then refine it into the life force of the monk himself.

Now that he is in the Fire Domain, the essence of the outside world is naturally the flame of this purple qi coming from the east.

Soon, the fist-sized piece of eternal blue gold in the Ten Cave Heavenly God Ring was completely contained by the Purple Fire, and at the same time, Zhou Tong also used the power of his Ten Cave Heavenly God Ring to bloom, completely suppressing the Purple Fire and preventing it from leaking.

The purple flame burned in the Ten Cave Celestial Rings, constantly tempering the eternal blue gold, and the sonorous sound was endless.

One, two, three......

Time passed day by day, and after half a month, even the purple mist in this place had become much thinner, but the Eternal Blue Gold was still only slightly deformed, and it did not move in the direction that Zhou Tong had in mind.

"No...... The flames here are still too weak. Zhou Tong pondered for a while, then shook his head, "If you want to cultivate Eternal Blue Gold here, I'm afraid it will take ten years." ”

He got up and continued deeper into the Fire.

Soon, he came to the junction of the sixth and seventh layers of the Fire Domain.

The five-colored clouds and mist in front of him were hazy, not like flames at all, just like fairy energy, which looked very peaceful, but it made people's hearts beat.

But Zhou Tong did not have the slightest fear, and still walked calmly towards the front.

As soon as he entered the seventh layer of the fire domain, Zhou Tong suddenly felt that the heat had risen again, even with the suppression of the Ten Cave Heavenly God Rings, he felt extremely hot.

"This layer of fire can still withstand it! Let's try it out and see if this five-colored flame can make Eternal Blue Gold take shape! Zhou Tong walked directly to the hottest place in the seventh layer of the fire domain and sat down.

The multicolored divine flame instantly entered the Ten Cave Heavenly God Ring, and the piece of eternal blue gold was quickly wrapped in the five-colored flame, constantly refining.

For a moment, there seemed to be a sonorous sound like striking iron coming out of his Ten Cave Heavenly God Ring. Zhou Tong had already thought of the style of Vajra in his heart, and he was constantly refining it with the divine fire here.

"Sure enough, the flame of the seventh layer is much more terrifying, and one day can be worth half a month of hard labor of the flame of the sixth layer!" Zhou Tong saw that his piece of eternal blue gold was slowly deforming, and nodded slightly, but quickly shook his head again.

"But it's still too slow...... At this rate, it will take at least half a year to make the trip! I don't have that much time to spend here! ”

"And this is still such a palm-sized piece of eternal blue gold, if it is my piece of divine scar purple gold, it will be even more difficult to refine." Zhou Tong was silent for a while, then got up again and continued to walk towards the depths of the Fire Domain.