Immortal Ancestor Battle Array, Gu Fan is very, very familiar with it, and has controlled it more than once.

The various battles that he participated in as an Immortal Ancestor Battle Array can also be described as countless.

However, Gu Fan really hasn't understood the Immortal Ancestor Battle Formation.

Of course, there is a reason why Gu Fan didn't comprehend it, but on the other hand, it has to explain one thing - that is, the Immortal Ancestor Battle Array itself, in fact, it is really difficult to comprehend.

Otherwise, even if Gu Fan didn't deliberately comprehend it, after such a long time of control, he should have already comprehended the Immortal Ancestor Battle Array, but the reality is that Gu Fan didn't do it.

Except for the high difficulty of the perception of the Immortal Ancestor Battle Array, there is really nothing else to explain.

When Gu Fan began to feel, he did feel the difficulty.

However, this difficulty becomes less difficult after Gu Fan is immersed in it.

Combined with the experience of the people who had previously comprehended the Immortal Ancestor Battle Array, Gu Fan knew that this was because he really had talent in this area. Otherwise, it would never feel like this.

Sure enough, it didn't take long for Gufan to get started.

Subsequently, step by step, it continued to be deduced, and it corroborated with the Immortal Ancestor Battle Array. Especially from the perspective of the present, to understand the previous control, such a different perspective, the feeling is completely different.

And soon, Gu Fan frowned.

He found that there were many places in the Immortal Ancestor Battle Array, which seemed to be imperfect.

It's not that the Netherworld derivation is imperfect, but from the overall derivation of the Netherworld, it's very smooth. However, some of them, I don't know if there is a gap between the understanding of the Netherworld and Gu Fan, Gu Fan found that some things are not related to the Netherworld.

Gu Fan was interested, if these things were added, would it solve the problem of the slow increase in the level of the Chaos God? If this problem could really be solved, it would be of great significance.

The ancient sail quickly sank into it.

And Gu Fan soon found that these things are really not ordinary difficulties, and he clearly saw the problems, but how to solve these problems and how to improve these problems requires too much energy.

In addition to taking care of the growth of the Void Nirvana Flower and maintaining the interception of cultivation, and then observing everyone's cultivation status and occasionally getting together with the women, Gu Fan spent the rest of his time in this regard.

Solve the problem from the very beginning, little by little. Gufan completely forgot the concept of time.

Sometimes, a very small and very small problem, because it needs to be connected to the whole, needs to take tens of thousands or hundreds of thousands of years to solve in the ninth layer of the Qiankun Tower.

Gu Fan's purpose of passing the time has been completely achieved.

However, now Gu Fan has forgotten the purpose of passing the time, he really wants to solve the problem of the Immortal Ancestor Battle Formation now.

The more he studied, the more he felt that although the Immortal Ancestor Battle Array of Netherworld Perception was strong, it was not the most perfect. And he had a hunch that as long as he could solve all the problems in a series of ways and reach the consummation state of 90,000 people, the Immortal Ancestor Battle Array would definitely change greatly from before.

Little by little, time passed.

Reality time: 10,000 years, 10,000 years have passed.

10,000 years of reality is equivalent to 5.12 million years in the ninth layer of the Qiankun Tower!

Gu Fan had spent more than twenty million years studying the Immortal Ancestor Battle Array.

Even Cheng Shumeng and the others had already completed half of the progress in the later stage of the Great Sage.

Sister Gu Yun's side was faster, and it was already more than half, and even her father's side had improved a lot at the level of the early stage of the Chaos God.

But Gu Fan still didn't completely derive the new Immortal Ancestor Battle Array.

Until the Netherworld comes out.

The total research time has reached the level of nearly 30 million, and it still has not been able to completely solve the problem.

However, after the Netherworld came out, Gu Fan immediately put aside the research of the New Immortal Ancestor Battle Array.

Compared to the search for the Fire Soul Stone, the New Immortal Ancestor Battle Array will be ranked behind.

"Master, according to the previous intensity, I will have absolutely no problem holding on for a hundred minutes now!"

"Hahaha!good!good!good!good!" Gu Fan was overjoyed, this is really great news.

One hundred minutes, where did you dare to think before, it seems that letting the Netherworld advance to the middle stage of the Chaos God, and keep it unpromoted, is indeed too much help.

Without the slightest hesitation, Gu Fan immediately put an end to everything and set off for the Hell of Hearts.

Even in a hurry, Gu Fan did not forget to hide himself and be cautious.

The more at this time, the more you can't be delayed by anything.

Gu Fan was not carried away by the joy of the Netherworld.

Gu Fan, who had successfully reached the Heart Hell, and who had constantly adjusted his emotions along the way, did not need to stay outside, and chose a random direction and rushed directly into the Heart Hell.

"How?" After entering the Hellfire, Gu Fan asked the Netherworld as he teleported through the Soul Realm.

Earlier I said 100 minutes, just guessing, just judgment, just analysis, just estimating!

Now is the real experience, and the feelings and calculations of the present are the most real.

"Master, the intensity hasn't changed from last time!My inference is completely fine!One hundred minutes!" The Netherworld came out, and this news was the biggest boon for Gu Fan.

"Good!" Gu Fan's heart settled, and he resolutely teleported to the middle level.

After all, this is the fourth time that Gu Fan has come to the Heart Hell.

The first three times all failed.

So, what about this time? Will it succeed this time? Gu Fan doesn't know, but Gu Fan will do his best to pursue success.

Again, if it doesn't work this time, then next time.

As long as there is indeed a Fire Soul Stone in the Heart Hell, Gu Fan is sure that he will definitely be able to find it.

It was still five minutes before Gu Fan arrived in the middle of the Hellfire of Hearts.

Gu Fan stepped into the middle area without hesitation, and the soul domain was reduced from a detectable radius of millions of miles to a radius of 100 miles in an instant!

Gu Fan misses the Space Sacred Stone immensely. If there is a Space Sacred Stone, the detection range is larger here, then there is a greater chance of finding the Fire Soul Stone.

Gu Fan didn't turn on the Soul Domain Granulation right away, now there is enough time, counting the time to return, as long as the safety line is controlled, then, the later and deeper into the middle area, the more likely it will be to find the Fire Soul Stone.

On the periphery of the middle area, the possibility of the existence of the Fire Soul Stone is still a bit small.

It's not as good as going deeper into an area.

"Nether, no problem!" Gu Fan didn't forget to ask Nether.

"No problem! everything is fine!" replied Netherworld, firmly.

"Okay!" Gu Fan kept teleporting, and where he teleported, it was clear whether there was a fire soul stone in the enveloping area.

In fact, not only Gu Fan was looking for it, but other people were also looking for it when they opened the vision of the soul domain.

Gu Fan is afraid that he will miss it, so let everyone come together!