Under He Xuru's deliberate arrangement, Fang Heyu and Shui Ruohan walked all the way, while the others went their separate ways and continued the search.

Shui Ruohan was still extremely excited, and said beside Fang Heyu: "Childe, what you said is true, I still feel like I'm in a dream." ”

"Of course it's true, isn't our relationship settled early, hehe, we'll get married when we go back. Fang Heyu said with a smile.

"Childe, don't wait to go back, just find an opportunity recently and let Ruohan serve you. ”

"This kind of thing is generally a man who is more anxious, what are you anxious about, are you afraid that I won't be able to run away?"

Shui Ruohan blushed and said, "I just want to sit on everything, so as not to have too many dreams at night." ”

"Okay, don't think so much, now we have to focus on the fire line, that Gongsun Hong is very tight-mouthed, and I haven't tricked his secret. ”

"I think they're actually trying their luck, Childe, I don't think it's a way to go on like this, we should think about whether there is any special way. ”

Fang Heyu frowned and said: "I have only heard of this kind of thing as the fire silk thread, and the legend is that it is the phoenix feather, in fact, I am very convinced of this, because after the fairy broke through to the golden immortal level, the feathers obtained from her body can finally form an ice silk thread, and her body is the divine beast ice phoenix, so it is obvious that the fire silk thread is transformed by the feathers of the fire phoenix." ”

"The problem is that I can't tell that this desert island has traces of a fire phoenix inhabiting, and if this kind of divine beast appeared in the mysterious sea, it would have spread throughout the entire sea area long ago, and it is impossible for the demon domain not to receive the news. ”

"It doesn't look like the fire phoenix has appeared here, and I have inquired clearly, those who have found and obtained the fire silk thread have inadvertently found it from the cracks in the stones, how can the fire phoenix feathers appear in the cracks of the stones, this is a little weird. ”

"Childe, what are you going to do?"

"Actually, I've wanted to dig under the island for a long time, if there is still a fire thread here, that is, there is still a chance underground, but there are too many people here, and I am too eye-catching to do this, do you have any good ideas?"

"The people gathered here are cultivators from all over the Mystic Sea, even with the name of my Ice and Snow God Mountain, it is impossible to force everyone to leave, that will cause public anger. ”

"So I wondered if I could start in the sea and dig horizontally from the bottom of the island, so that I could go down the bottom of the island and see what the secrets were there. ”

"There are so many people on this island, and even if you do that, you will be seen. ”

Fang Heyu frowned and said: "Actually, it's not difficult to hide from everyone, I'm just thinking, this has happened for so long, why hasn't anyone tried to dig down, this method is not difficult to think of, right?"

Shui Ruohan said: "Maybe they think that the fire thread is not underground?"

"Anyway, since we have confirmed that there is still a fire thread here, then we will first dive into the seawater, and then dig horizontally, and we will not lose if we act first. ”

When night fell, Fang Heyu gathered everyone, and then secretly entered the sea from the ground, and then began to dive.

With Fang Heyu's simulation skills, Fang Heyu easily fooled everyone, and after diving dozens of feet, he began to dig horizontally.

When Fang Heyu used the Luna Arrow to dig on the rock formation for a short while, he stopped, because the hardness of the rock in front of him was beyond his imagination.

"This is molten igneous rock, which is super resistant to high temperatures, and the molten igneous rock here seems to have become extremely hard after countless years of calcination, and I finally understand why those people don't dig down. Fang Heyu said.

He Xuru stroked the molten fire rock and said: "It must be that those people secretly excavated and found the hardness of the rock formation, and finally gave up." ”

"Ru'er, what's going on with the molten fire rock, can you feel the temperature?"

"A little bit, this molten igneous rock should be at a different temperature than the seawater, it seems to be a little bit higher. ”

"So it's still being calcined?"

"I don't know, I'll have to dig in and see. ”

Fang Heyu had no choice but to continue digging, the hardness of the melted igneous rock made his excavation progress extremely slow, even with the sharpness of the Moon God Arrow, it took a day to dig a depth of one meter.

This rate of progress made everyone feel a sense of discouragement, although the island was not large, but it was more than a dozen miles in diameter, and at this rate, they would have to dig for at least a decade or two to reach the bottom of the center of the island.

Fang Heyu smiled bitterly: "Hey, I didn't expect this to be such a situation, how about it, whether to dig or leave, and continue to look on the island, it must be meaningless." ”

He Xuru touched the newly excavated rock wall and said, "I am sure that the temperature of the rock wall here is slightly higher than that outside, which means that the more you dig inside, the higher the temperature will be." ”

"Ru'er, you seem to be in favor of continuing to dig?"

"I think there should be a big surprise inside, and this is the first time I've felt this way since I arrived in the Mystic Sea. ”

Seeing He Xuru's statement, the others also agreed, and Mo Yi said: "Since Ru'er has feelings, let's not give up, it's only one or twenty years at most, and the time is not too often." ”

In the following days, everyone began to dig in turns, although the progress was very slow, but it was carried out steadily, and the people on the island did not find them, and Gongsun Hong even thought that they had secretly run away for fear of their revenge.

The fact is that as Xu Ru said, the more you dig in, the higher the temperature, and now even Fang Heyu and the others can feel the change in temperature.

The sea outside was cut off by Moy, and the passage was now a vacuum chamber, and the daily work of the seven of them was to dig in turns.

On the island, countless cultivators have begun to disperse gradually, because they have nothing to gain, and even Gongsun Hong has lost his patience a little.

More than ten years have passed, and no one has ever obtained the fire silk thread again, so the people here are now almost all Gongsun Hong's subordinates, except for a few scattered cultivators.

In the sea, Fang Heyu and the others had already dug for several miles, and the temperature of the molten igneous rock in front of them was already extremely high, and the blazing temperature calcined the molten igneous rock all over the body, and they didn't know what was in it.

Fang Heyu had wanted to use the Twilight Snow Realm to probe the situation behind the Molten Igneous Rock several times, but the high-density Molten Igneous Rock had almost completely isolated the power of his domain, so now everyone was full of curiosity about what was hidden behind him.

"Brother Yu, it can't be that there is really a fire phoenix here, right?"

"It's really possible, otherwise it won't be possible to explain so many phenomena, I think it's not far from digging up the molten fire rock, everyone be extra careful, don't be attacked by the fire phoenix." ”

After more than a month, the molten fire rock was finally completely dug through, and behind the molten fire rock was a cave-like existence, but it was full of monstrous flames, and everyone could not see anything except the flames.

The high temperature of the flame was no worse than the immortal fire of Fang Heyu, and everyone urged Yuan Li to protect the whole body, and then drilled out of the passage.

Everyone was bathed in flames, and then the search began. The cave was not huge, and soon they searched all over the place and made amazing discoveries.

In the center of the cave, there is indeed a fire phoenix, the body of the fire phoenix is all fire red, the whole body is surrounded by firelight, even the feathers are burning with flames, it seems that it is indeed the existence of a divine bird, and it exudes the majesty of a divine beast.

It's just that this fire phoenix is locked by nine huge chains, and the ends of the chains are embedded in the rock wall, firmly controlling the body of the fire phoenix.

The fire phoenix emitted monstrous flames, but the chains were all made of blood god tungsten, and she was not afraid of her flames at all, and even under the calcination of her phoenix's true fire, the chains had become more tenacious over the years, and the fire phoenix could not break free at all.

Fang Heyu also found that there seemed to be some kind of formation in the nine chains, which could suppress the Yuan Force of the Fire Phoenix, so that the strength of the Fire Phoenix was only one percent at most, so that she could not escape from here.

Fang Heyu and the others gasped, what kind of person did this to imprison the divine beast Huofeng here.

He Xuru came to the front of Huo Feng and said, "I know you are not dead, otherwise there would not be such a strong flame, tell me, why are you locked up here?"

Huo Feng really said: "I didn't expect it, someone really came here, great, you can help me out......" Huo Feng's voice was a crisp female voice.

Fang Heyu came to He Xuru's side and said, "Even if we want to save you, we can't do it, we can't break the chains made of these nine blood god tungsten at all, and the formation in it is not something we can crack, who trapped you here?"

"Hehehe, it's very simple to leave, I just need to make a contract with this little girl, and then I can be reborn with the power of Nirvana, get out of the control here, and I will be able to regain my strength in a few years at most. ”

At this time, Shui Ruohan, Mo Yi and the demon also flew over, and the faces of the three girls were very bad, especially the demon demon, her attributes were naturally very uncomfortable in this kind of place full of flames.

He Xuru saw the face of the third girl and said, "Can you put away the flames first, so that we can't hold on for too long." ”

"Good ......" The fire phoenix trembled its wings slightly, and then the monstrous flames in the cave instantly began to condense around her, and finally all of them drilled into her body, although the heat in the cave was still unbearable, but it was much better than before, at least with everyone's cultivation, it would not be affected anymore.

Everyone finally saw the figure of the fire phoenix clearly. The fire phoenix is full of feet, and her feathers are all fiery red, no different from the legendary phoenix, her feathers seem to be burning with flames, which makes Fang Heyu and He Xuru, who are closest to her, feel the terrifying high temperature.

He Xuru said: "It's much better now, since you can be reborn in Nirvana, then why didn't you do it earlier, and be imprisoned here?"

Huo Feng also saw it, if she didn't say it clearly, these people would never save her, she thought for a while, and said: "Human, I can see that you should not be bad people, of course you are also smart people, let's make a deal, how about it?"

"What deal?" He Xuru said, Fang Heyu did not speak, but handed over the right to speak to He Xuru.

"If you let me go, I can promise to do three things for you. ”

He Xuru laughed and said: "It's not that simple, first of all, you have to tell why you are imprisoned here, we have to confirm your safety before we can release you, secondly, you are at most a Heavenly Immortal cultivator, so we don't really need your help, and besides, we really can't destroy these chains, and if we conclude a contract with you, who can guarantee your safety?"

"It's said that human beings are smart, and it's true when I see it today, okay, I'll tell you where I came from......" Huo Feng sighed.

"Listen to ......"

"I'm from the Demon God Continent, presumably you are also a famous person in the Mysterious Sea, you should have heard of the three demon gods of the Demon God Continent, I'm right. ”

Everyone nodded, and Huo Feng continued: "In fact, countless years ago, there were four demon gods in the Demon God Continent, and I was one of them, named Feng Luan, in addition to me, the other three were Jing Qian, Qiu Yan and Feng Feng, among the four of us, I am the strongest, although the three of them are males, but they are not only jealous of me, but also jealous. Later, I was plotted by the three of them, and was seriously injured by them, and then they created this set of Nine Shadows Secret Locks to trap me in the Mysterious Sea, wanting to completely wipe me out with the endless water attribute of the Mysterious Sea. ”