After Xia Fan left the range of thousands of miles in Hanjing City, the five colorful crystal pools behind him instantly emitted colorful light, and surrounded by seven-colored light, the rainbow sword bloomed with a rainbow of three meters in the sky.

The Rainbow Mang Sword all emitted a slight trembling sound, which was the state of being urged to the limit, because the aura absorbed by Xia Fan's five Colorful Crystal Pools had reached a terrifying level.

If Xia Fan completes this perfect foundation for the first time, the dialogue with Xiao Tutu when casting this colorful crystal pool is that the general stone pool is like a motor on a motorcycle, the silver spirit pool is like the engine of an ordinary car, and the golden spirit pool is the engine of a sports car.

But because of physical reasons, there was no way to cultivate, and there was no way to have these step by step, so Xia Fan simply crossed all this directly and installed the engine that should belong to the plane on his body.

At that time, the reason why Xia Fan used this analogy when he was on earth in his first life was because Xiao Tutu didn't understand these aspects, and because he was an immortal pavilion artifact spirit, he was extremely confident that he knew everything in the sky and on the earth.

In fact, after being reborn, when Xia Fan really cultivated the Perfect Colorful Crystal Pool to the fifth seat, he was completely urged, and it was really terrifying to the extreme. Of course, this also has a flaw, that is, because too much aura transformation mana poured into the body, it was difficult for the general body to bear, so Xia Fan chose the most stable exercise when choosing the exercises, and it was because of this. And after the breakthrough of the fairy world, he learned the rejuvenation chapter with Xiao Tutuna, also because urging this colorful crystal pool brought huge power, but also brought a huge load to the body.

Therefore, Xia Fan will continue to hurt himself when he is cultivating, fighting, and urging the spirit pool to run the power, and he has rejuvenation and pills to make up for it, and his body continues to recover quickly after subtle damage, which also causes Xia Fan's physical strength to exceed his own strength a lot, and only in this way can he withstand his increasing strength.

Before, just flying with the sword in the state of an ordinary stone pool had already exceeded the ordinary foundation building ninefold, but now Xia Fan let go with all his strength, ignoring the load and damage of his body, and the power absorbed by the colorful crystal pool pushed the Hongmang Sword, and the speed was already comparable to the ordinary spiritual cultivation period. Therefore, for Xia Fan, body tempering is a matter anytime and anywhere, and at this moment, when he is flying at full speed, he has to constantly restore his damaged body and let his body complete tempering again and again.

Tens of thousands of miles away, even if Xia Fan was not afraid of wear and tear with the terrifying Colorful Crystal Pool, and flew at full speed without stopping, it took him three days and three nights to arrive.

Although it took a long time, this was also the reason why Xia Fan deliberately avoided the city, and at the same time, he also deliberately flew at a high altitude, coupled with his own full strength to urge the Colorful Crystal Pool, which was also a special cultivation for Xia Fan.

However, even if there was no problem with the continuous flow of spiritual energy in the Colorful Crystal Pool, Xia Fan also felt a little tired mentally, so when he fell far away around the Burning Demon City, the first thing Xia Fan did was to take a rest first, buffer it, and even directly cast a small formation and lay there to sleep. Then he took out something, ate some things, and spent a few hours to restore his mental state to the best, and then entered the scope of this Burning Demon City.

Hundreds of miles around Burning Demon City have become a forbidden area, this forbidden area is not artificially defined, but no one wants to come here. Ordinary people can't approach it at all, it's a scorched earth here, it's extremely hot, Xia Fan just walked into a few dozen miles, and he felt that the temperature inside was at least close to eighty or ninety degrees, so he had to urge his mana to block it.

Even cultivators didn't want to come here, and there was no way to condense the aura in the surrounding sky, so you can imagine how tragic the last battle here was. According to records, after the Demon Kingdom slaughtered the city, His Majesty personally ordered the destruction at all costs, and finally the entire city was completely burned down in a great battle.

Step by step, the temperature continues to rise.

"There is not even a corpse, this fire is not like a battle flame, looking at this position and heat, how can it be like the effect caused by the Extreme Fire Formation?" It's just that the more he walked inside, the more Xia Fan felt that something was wrong, and others couldn't notice it, but Xia Fan's attainments in the formation made him quickly aware of it.

Obviously, the situation in this Burning Demon City is not consistent with what the official said, but it doesn't matter to Xia Fan, he just feels a little curious, because with his current strength, he just enters the central area of this Burning Demon City normally, and he feels that he can't breathe well and sweats constantly.

The situation here is so bad that even the ordinary spiritual cultivation period is difficult to support for a long time, not to mention that this place is just a ruin, and no one wants to come here.

More than ten years have passed, and this is still the case here, and the situation back then made Xia Fan secretly guess. But that was just a thought, and then as soon as Xia Fan raised his hand, the Ten Thousand Soul Banner was instantly sacrificed.

"Ice Array, Whoosh......" Xia Fan manipulated the remnant soul in the Ten Thousand Soul Banner, and instantly arranged a cold ice array around him, and as the formation of the formation, the surrounding temperature plummeted, and Xia Fan, who was almost unable to support it, let out a long breath.

In this way, Xia Fan felt that it was harder than flying wildly for three days and three nights in a row, and the aura around here was chaotic and could not be absorbed, so Xia Fan had to take two aura pills to restore the aura.

Half an hour later, Xia Fan felt that the remnant soul in the Ten Thousand Souls Banner was trembling, knowing that he couldn't stay here for a long time, and when he raised his hand, it was nine hundred and eighty-one meteorite iron steel pillars distributed around, but this time Xia Fan only needed a drop of blood to pop out, and with the help of the Ten Thousand Soul Banners that had been refined now, he instantly attracted these ninety-nine eighty-one meteorite iron steel pillars.

"Buzz... Boom ......" The ninety-nine eighty-one meteorite iron steel pillars trembled instantly, and the formation was urged, but what even Xia Fan didn't expect was that it wasn't like the last time in the Chaotic Soul Stream, and countless remnant souls were instantly stimulated. Because according to what was known at the time, in addition to the many demon cultivators of the Demon Kingdom, there were also many powerful and hundreds of thousands of troops of the Han Dynasty who were summoned from the Demon Realm who died here.

Coupled with the millions of ordinary people, even if most of them were destroyed because of this Extreme Fire Formation, then the remnant souls here should be much stronger and more powerful than the Chaos Soul Stream.

But what Xia Fan didn't expect at all was that under the urging of his formation, only dozens of remnant souls came out, and they were extremely weak, without anger and murderous aura, except for a few remnant souls that appeared in the cold ice array formed within dozens of meters around Xia Fan with the Ten Thousand Soul Banner, as soon as the other remnant souls came out, they were completely killed by the scorching temperature in an instant, clean and dissipated between heaven and earth.

"Damn!!" This situation suddenly surprised Xia Fan, but at the same time he was a little excited, and it was abnormal to mean that something was wrong!

The ground here is scorched for tens of meters, and it is even hotter, I am afraid that even the spiritual sense of the Transformation Stage will be difficult to detect the situation, but Xia Fan has his own way, his hands condense the seal technique, and instantly close the range of the Ten Thousand Soul Banner Cold Ice Array. Let more remnant souls be available for him to drive and control, and then manipulate the remnant souls in the Ten Thousand Soul Banner to disperse directly on the eighty-one meteorite iron steel pillars.

"Buzzing ......" Xia Fan's remnant souls surrounding each meteorite steel pillar condensed the formation, and in an instant, all those meteorite iron steel pillars went deep into the ground. The scorching temperature caused the meteorite steel pillars to melt, but fortunately, Xia Fan used his remnant soul to form a formation on the meteorite iron steel pillars, so that these meteorite iron steel pillars were not melted.

"Bang bang bang ......" Finally, eighty-one meteorite iron steel pillars penetrated the scorching scorched earth layer, and then he felt the temperature drop sharply, and Xia Fan instantly felt the situation below with the help of the remnant soul in this meteorite iron steel pillar.

"Roar... Whew......"

"Kill... Kill ......"

"Woo......"

.........

Countless remnant souls formed a phalanx and were bound there, the feeling was very similar to Xia Fan controlling the remnant souls in the Ten Thousand Soul Banner, but Xia Fan was completely tempered and controlled, and this was to restrain it with one power after another. The spontaneous power of these remnant souls supported the continuous operation of the power that confined them in the outer circle, and then formed a natural shielding extreme fire formation here, which also had a hidden effect.

If it weren't for the high temperature blocking caused by the Extreme Fire Formation, with Xia Fan's formation attainment, it would not be difficult to detect the situation below. If he hadn't just wanted to collect the remnant soul this time, he wouldn't have deliberately pursued it, and he would never have found out that there was such a thing inside.

"Damn, there's something going on. Xia Fan was not afraid of anti-joy, his eyes lit up, and then he immediately controlled the power of the Ten Thousand Soul Banner, controlled the remnant souls in the meteorite steel pillar, and directly broke the remnant souls that were forbidden by these formation circles. The quality of the remnant soul here is very high, several times higher than that of the chaotic soul stream, and the quality of the remnant soul that can survive in this situation must be extraordinary.

It's just that as soon as Xia Fan broke this formation, after the hidden effect disappeared, he instantly felt a surging demonic qi surging out from the depths of hundreds of meters underground, this demonic qi was extremely amazing, this demonic qi was much more powerful than ordinary demonic beasts, and with the help of the remnant soul on the meteoric iron steel pillar, he instantly rushed down, and he saw a huge demonic Jiao head of a hundred meters below, and his body seemed to extend downward.

Not only that, at this moment, after this concealment formation disappeared, Xia Fan realized that there were many forces around him that were exactly the same as this one. This is not the most critical, the most critical thing is that Xia Fan feels this... This guy turned out to be alive, its breath seemed to be recovering, and sensing an external force, its eyes seemed to move.

Damn it!

At this moment, as soon as these remnant souls came out, they immediately went into a state of madness, but Xia Fan didn't give them this opportunity, and once again urged the meteorite steel pillar to force these remnant souls out. Then there was a burst of screams, because of the high temperature of the scorched earth on the outside, many of the remnants who were forced out disappeared directly, and even the stronger ones immediately withered a lot after they came out, which helped Xia Fan a lot.

That guy's breath, Xia Fan is sure that if he really wakes up, he will definitely be able to kill himself in an instant, but if he really lets Xia Fan leave like this, it is not his character. Knowing that the demon world is dangerous, even in that situation, he does not forget to take benefits, although he was surprised that the situation was strange and not good, but in the end, his heart sank, and he was rich and dangerous, so he first completed the purpose of this trip and then talked about it.

Thinking of this, Xia Fan was even faster, and he began to refine the Ten Thousand Soul Banner again with great skill. Now Xia Fan's strength is much stronger than when he refined the first Ten Thousand Soul Banner last time, not to mention that the one-horned black bull demon core he uses now is much stronger than the bird head of the three-headed monster bird, plus the remnant soul here did not resist much, Xia Fan took less than an hour and a half to complete the new Ten Thousand Soul Banner under the condition of being constantly distracted and carefully watching if the huge Demon Jiao would wake up.

When Xia Fan finished refining this Ten Thousand Soul Banner, the first thing he did was to use the elixir and power to urge those remnant souls in the Ten Thousand Soul Banner to rush below again and thoroughly investigate the situation below.

"I... Relying on ......", Xia Fan couldn't help but gasp.

In nine directions, the same remnant soul of the nine regiments was gathered, before Xia Fan broke one, there were still eight formations and remnant souls left, Xia Fan didn't have to break them all at the moment to already know what was going on.

"Nine-headed Demon Jiao, this is a Demon God Beast that surpasses the pure-blooded Demon Beast!"