The two waited below for a long time, and then Liehu jumped down again, and after Liehu walked away, Mo Han and Chu Ning ignored it before jumping up.

In front of the platform, which was less than two zhang long and wide, there was a barren hole, but the entrance of the cave was surprisingly large, embedded in the mountain wall, five or six zhang long, and the scorching breath emanated from the mountain wall.

The two of them did not hesitate any longer, and immediately walked slowly out of the cave.

The ancient cave is deep, but the temperature in the air is very high, Mo Han just entered the forehead covered with beads of sweat, he glanced at Chu Ning beside him, and saw that she was also drenched in sweat, and the original white cheeks were also flushed with a faint flush at this time, obviously because the temperature was too high.

As they continued to enter the cave, the scorching breath became more and more intense, and the beads of sweat on their bodies gradually evaporated, and even the smell of burning from the tips of their hair could be smelled, and the hearts of both of them were full of surprise, not knowing why the temperature in this cave was so high, even higher than the temperature in the cultivation room on the first few floors of the inner heart of the cave.

The two of them immediately mobilized the vitality in their bodies and dispersed around their bodies, and then they felt that the surroundings were not so hot.

The passage winded into the depths of the mountains, and the two of them walked for a long time before they finally came to the end, but when they saw the scene in front of them, they were stunned by surprise.

There is a huge cave, but the cave is empty, only in the center there is a deep hole, faintly emitting a strong light, and the top of the cave is completely hollowed, the passage goes straight to the sky, and at this time, with a ray of moonlight reflected, the center appears much brighter.

The two slowly approached the deep cave, but the temperature around them was getting higher and higher, and the two only felt a burst of heat, and they finally came to the edge of the deep cave despite the blazing temperature, and the probe looked down, and the two were shocked.

It was a semi-circular pit, but there was a dark green flame burning in the middle, the light of the flame was extremely bright, it was not weaker than the thunder fire, and it was swaying at this time, emitting a strong light, and the reason why the temperature in the cave was so high was probably because of the existence of this flame!

As soon as the two of them saw the flame, they immediately said, "This, this is the divine fire!"

Yes, there is only a divine fire in the world that can achieve such a great effect, and can raise the temperature of the entire cave to such a high level.

The hearts of the two of them were almost jumping out of their throats, whether it was from the bright luster of this flame or the seemingly weak but emitting such a powerful light, it must be an extraordinary divine fire, at least it should be a good divine fire, but this divine fire is not like a primitive.

At this moment, the voice of the machine spirit came slowly, and Mo Han only heard him: "Damn, there is a heart fire here!"

The machine spirit usually cultivates in Mo Han's pendant, but this time he probably noticed the existence of the divine fire, and he couldn't help but be surprised, and when Mo Han heard the word "heart fire", his heart was suddenly shocked.

He still remembered that Aunt Lan had told him that there were five divine fires in heaven and earth, namely thunder fire, heart fire, yang fire, ghost fire, and dark fire. These five divine fires can all be promoted to the ninth order, and the thunder fire in his body is said to be able to grow into the Nine Heavens Divine Fire, but he didn't expect this dark green divine fire to be the heart fire that is as famous as the thunder fire.

Mo Han immediately looked at Chu Ning and said, "Senior Sister Chu, this should be a fire in your heart. ”

Chu Ning nodded, her grandfather was the refiner Elder Chu, under his ears and eyes, her own knowledge was far beyond her peers, she was just not sure, after all, she had never been in contact with divine fire, but after listening to Mo Han's words, she also made up her mind.

Heart fire, according to legend, is the most mysterious flame in the divine fire, but also the purest power in the world, the ability is unknown, there are only two possibilities that can contain the heart fire, one is that the heaven and earth are born from the earth under the mutation, this heart fire is born from the earth fire, but far beyond the earth fire, the second is left by those fire savage beasts with the power of heaven and earth after death.

Although this heart fire is also hidden in the deep pit, it is far from being at the end of the earth, and it obviously belongs to the second type, and only the second possible caste can explain why this heart fire looks so weak, but it has been going on for a long time!

I think that the thunder fire in Mo Han's body has just been nurtured, and it didn't take long for it to become extremely weak, I believe that as long as it doesn't take half a month, the thunder fire will definitely disappear, and it is precisely because of this that the divine fire is becoming more and more rare, and this heart fire can be kept long enough to not be extinguished, and this time can even reach forty or fifty years!

At this time, Mo Han saw this heart fire, although he felt extremely surprised, he didn't think much about it, he glanced at Chu Ning and asked: "Senior Sister Chu, this heart fire is estimated to be left after the death of some kind of strange beast, I don't know if you want to go up and give it a try?"

The attraction of divine fire to martial artists is fatal, even Chu Ning is no exception, I saw Chu Ning clenching his hands at this time, and his beautiful face was even more nervous. She knew that Mo Han had already fused the thunder fire, and it was impossible to fuse other thunder fires, so she nodded immediately.

Chu Ning took a deep breath, and then jumped into the deep pit. I saw her come to Xinhuo's side, hesitate slightly, and then slowly stretched out her white right hand.

The dark green flame swayed and was emitting a scorching aura, and as soon as Chu Ning's right hand touched the flame, her eyebrows couldn't help but wrinkle slightly, and it only lasted for about seven seconds, and her right hand retracted.

Chu Ning tried again, her current cultivation far surpassed that of Mo Han at the beginning, and it was correspondingly easier to withstand the impact of the violent energy of the divine fire, and this time the situation was much smoother than when Mo Han absorbed the thunder fire.

Maybe it's also because this heart fire has not been replenished by fire energy for a long time, and she is also longing for a place to stay, after trying for nearly an hour in a row, suddenly when Chu Ning stretched out her white right hand again, the dark green flame strangely did not enter her body.

Chu Ning was startled, followed by a burst of ecstasy, only to see her turn her hand and move, the flame appeared in her palm again, just like the thunder fire in Mo Han's body at the beginning, it was swaying, exuding a bright light!