Come to think of it, so many eras have stayed in one place, not to mention the machine spirits of the underground fire city, even the blood god himself has been suffocated.

Therefore, after seeing Ye Tian pass through the eighth layer, not only Xiaohuo was excited, but the Blood God was also excited.

"Master, don't resist, I'll take you to the core of the underground fire city...... Xiao Huo said, and the whole thing turned into a ball of light to wrap Ye Tian, and then disappeared together on the ninth layer.

After watching them disappear, the corners of the Blood God's mouth pulled into a smile: "This time it's cheaper for this kid, but now I'm tied to this kid, if he becomes stronger in the future, maybe I can have one more backer." ”

After knowing that Ye Tian's master was Emperor Ouyang, the Blood God no longer dared to have any ill will towards Ye Tian in his heart, because Emperor Ouyang was too powerful, so powerful that he couldn't help but bow his head, once he was targeted by Emperor Ouyang, even if he was a king-level master, he would have to fall.

The Blood God is still self-aware, knowing what to do and what not to do.

It's normal for someone like him to take away the Nine Emperors without a background, but for Ye Tian, it's better to be friendly.

The Blood Demon Ruler back then was so beautiful and powerful that it was enough to be comparable to the upper master, and it was also famous among the many masters of the True Martial God Domain.

But as soon as the True Martial God Temple gave an order, the Blood Demon Master died, and there was no way to escape.

And Emperor Ouyang is the absolute high-level of the True Martial God Temple, his status is second only to the Supreme Holy Lord, and it can even be said that he is on a par with the Supreme Holy Lord, and it is absolutely unwise to be the enemy of his disciples.

Unless there is a big figure as powerful as Emperor Ouyang behind the Blood God as a backer, this is obviously impossible.

Such a big man is not something that the blood god can climb.

......

Leaving the ninth layer, Ye Tian was taken by Xiaohuo to the core of the Underground Fire City, which is also the origin of the Underground Fire City, and it is also the core of Xiaohuo.

Ye Tian began to refine the underground fire city here.

Looking at Ye Tian, who was sitting cross-legged, Xiaohuo said with some expectation: "Master, with your refining speed, you will be able to succeed in 10,000 years at most." ”

"Ten thousand years......" Ye Tian smiled bitterly when he heard this, refining an artifact, it actually took ten thousand years.

However, thinking that this artifact was a dominant artifact, Ye Tian was also calm.

If it is the main artifact, with Ye Tian's strength, it will be successful in a moment.

However, a dominant-level artifact is not so easy to refine, especially a mansion-type juggernaut artifact like this, which has thousands of formations inside, and it is naturally difficult to refine and very time-consuming.

These 10,000 years are still because of the help of Xiaohuo, otherwise, Ye Tian will probably need to spend 100 million years.

After all, it is a master-level artifact, and it is used by the master, and it is naturally extremely difficult for Ye Tian to refine it as a subordinate main god.

However, on the way to refining, Ye Tian also gradually learned about the underground fire city, and he became more clear and excited about the magic of this underground fire city.

This artifact is really good, it is both offensive and defensive, and it can be inhabited.

It's simply the perfect artifact.

"With this artifact, I will be much safer when I venture into secret realms and ruins in the future. At critical moments, you can also resist the enemy and save your life. ”

Thinking of this, Ye Tian looked forward to it even more, and hurriedly worked hard to refine the underground fire city.

Time passed in a hurry.

Three hundred years have passed in a blink of an eye.

At this time, outside the Underground Fire City, the powerhouses of the Ying Heavenly Emperor Dynasty, the Blood Demon Sect, and the War God Temple were already ambushed in the sea of fire, staring closely at the Underground Fire City.

Lei Zhan, the Nine Emperor Princes, and the Demon King, also hid in the shadows, monitoring the movements of the underground fire city.

"Strange, why hasn't that kid come out after three hundred years?" the Nine Emperor Princes frowned, staring at the underground fire city not far away with a gloomy face.

Although three hundred years was only a blink of an eye for them, it was impossible for it to take so long to break through the underground fire city.

What the hell is Ye Tian doing inside? Why hasn't he come out yet?

Not only the Nine Emperor Princes were puzzled, but also the strong men hidden in the shadows were also very puzzled.

It's a pity that they don't have anyone to go up to the eighth floor, so even if they have doubts in their hearts, they can only wait here.

"Hmph, I don't believe you won't come out. The Nine Emperor Princes snorted secretly and could only continue to wait.

Anyway, it's just a few hundred years, even if it's thousands of years, tens of thousands of years, he doesn't care.

For their main god, any retreat is hundreds of millions of years, so naturally they don't care about this amount of time.

And the powerhouses who came here from the three major forces of the Emperor Dynasty, the War God Temple, and the Blood Demon Sect were also the main god powerhouses, and they didn't care either.

However, the news that they were surrounding the underground fire city still spread, and soon, some gods in the Blood Demon World knew about it.

Everyone was puzzled and curious, I don't know what these three forces are doing?

Even the first floor is secretly sending spies to investigate.

Time passed little by little, and after 10,000 years, Ye Tian finally refined the Underground Fire City.

At the core of the Underground Fire City, Ye Tian, who was sitting cross-legged, slowly opened his eyes, and his face showed a touch of excitement and excitement: "It is worthy of being a master artifact, there are actually more than 1,800 formations arranged in this mansion, and each of them is a master-level formation, it is really amazing." ”

The Juggernaut-level formation, once it is activated, is enough to exert a blow comparable to that of the Juggernaut.

Although it is only a subordinate master, it should not be underestimated.

However, Ye Tian also knew that he couldn't urge these formations now, he could only rely on those passive defensive formations in the Underground Fire City.

These passive defensive formations don't need to be urged by themselves, as long as they add divine stones, once they are attacked, they will be actively urged by themselves.

"This is simply a turtle shell, and no one can break through it unless they encounter a powerhouse at the lower Domination level. Ye Tian was secretly excited.

Not only that, but it is much faster to control this underground fire city to shuttle through the void, and it is much faster to control the Shenzhou to shuttle through the void.

At least it was much faster than Ye Tian's first-level Shenzhou.

However, there are also a lot of divine stones that need to be consumed, so in the True Martial God Domain, those masters are not willing to use the mansion artifact to travel, but choose to use the Shenzhou to travel, after all, the Shenzhou can save a lot of divine stones.

"Congratulations, master. At this moment, Xiaohuo suddenly appeared not far in front of Ye Tian.

Ye Tian nodded.

Xiaohuo is a machine spirit, which can naturally appear anywhere in the underground fire city freely, and can also mobilize some formations of the underground fire city.

In fact, not every artifact has a machine spirit.

Like Ye Tian's Purple Blood Knife and Blood River Knife, there is no weapon spirit.

The existence of the machine spirit is to help the gods better play the artifact, just like Ye Tian now, although he can control the formation in the underground fire city by himself, but after all, this consumes some mind, but if he lets Xiaohuo control it, it will be much more convenient, he just needs to concentrate on facing the enemy.

However, attack-type weapons like the Purple Blood Knife and the Blood River Knife rarely have a machine spirit, because this kind of weapon is very simple, and there are not as many formations as in the underground fire city, so it is much easier to urge, and there is no need for the help of the machine spirit at all, and it will be bad if there is a machine spirit.

"Xiaohuo, I'll go refine the Eternal Heart first......" As he spoke, Ye Tian suddenly disappeared in front of Xiaohuo.

After refining the Underground Fire City, although Ye Tian was not able to control all the formations in the Underground Fire City, he already knew everything in the Underground Fire City.

He knew where the Eternal Heart was.

The underground fire city was announced to the outside world that there were only nine floors, that is, the nine floors that Ye Tian had broken through, but it was actually much bigger than this, otherwise how could it be called a 'city'?

In fact, the interior of the underground fire city is very vast, it can be called a small world, and the so-called nine floors are actually a nine-story pagoda in the underground fire city.

Around the pagoda, there are exquisite and gorgeous Qionglou Yuyu, as well as splendid palaces, gardens, rivers, forests, all the same.

The Heart of Eternity was sealed inside a palace that could only be opened by those who refined the Underground Fire City.

Of course, the Blood God is a new form of the Blood Demon Master, so he can naturally open the seal and even control the underground fire city.

But he had already reached the Great Perfection realm of the Supreme Lord God, and this eternal heart was no longer of use to him, so he stayed here all along.

This is cheap Ye Tian.

Without thinking much about it, after Ye Tian opened the seal, he plunged into it.

"It's the Eternal Heart of the Lower Lord!" Ye Tian felt the familiar aura and power, and immediately knew the level of this Eternal Heart, which was the same as what he had obtained in the Nitas World.

If he used this Eternal Heart to comprehend the Ultimate Sword Codex, then this Eternal Heart of the Lower Domination level would no longer be of much use to him.

But if it is used to understand the laws of darkness, it is very useful.

At that moment, Ye Tian unceremoniously absorbed the power of the Eternal Heart, and he could feel that his soul was constantly improving, and he soon rose to the realm of the lower master.

"That should last me for three or five years. ”

Ye Tian felt his soul power, and suddenly felt a little surprised.

Although it was also an Eternal Heart of the lower Lord, the power contained in this Eternal Heart was obviously much stronger than the one he had obtained in the Nitas World.

Obviously, this subordinate master who was killed by the Blood Demon Lord is a very powerful one, even among the lower masters.

Not daring to waste the slightest, Ye Tian immediately urged his talent with the help of a soul comparable to the lower master level, and began to comprehend the laws of darkness.

The original obscure laws of darkness are now much simpler.

If it was said that in the past, Ye Tian's comprehension law seemed to be separated by a mountain, then now, he was only separated by a veil, as if he was close at hand, and the speed of his ascension was much faster.

This is also normal, the powerhouses of the master level have already cultivated the third-level laws to the realm of perfection, and they have all begun to comprehend the second-level laws.

Therefore, Ye Tian has a master-level soul and comprehends the third-level law, which is naturally very fast.