The black dog Ah Tu felt that this night was extraordinarily long, and the time passed extremely slowly, whether it was Lu Chen or the green cow, they never reacted after entering this dense fog, and they did not come back for a long time.

Several times it couldn't help but get up and walk to the edge of the fog, wanting to go in again to look for it, but every time it thought of its previous embarrassment in the fog, it couldn't help but flinch back.

If it weren't for the rescue of the green cow, Ah Tu would probably have been stuck in the thick fog and couldn't extricate himself. It's just that Ah Tu recalled the encounter just now, but he was also a little annoyed and unwilling in his heart, because Ah Tu could feel that when he was in the thick fog, his strength was actually not weaker than those strange things hidden in the fog, but the reason why he fell into the dilemma of having no power to fight back was because there were too many opponents, and they were almost all around him in the fog, and they couldn't prevent it;

Thinking of this, Ah Tu was also annoyed in his heart, but subconsciously took two steps back, this mist is really a little weird, if only he could directly breathe fire like a green cow and burn those strange things to death......

Well?

Ah Tu was suddenly stunned, stopped, and then looked back at the mist, as if he was a little distracted.

After a while, it slowly walked back to the edge of the mist, seemingly hesitant, but finally quickly made up its mind, and its broad, strong body stood up straight, and then a dark color suddenly flashed in its eyes.

It looked like a black firework.

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"I've been waiting for this day for a long, long time......"

The sound like thunder echoed in this dark and unreachable underground world, and in Lu Chen's eyes, the unbelievable huge black dragon, the terrifying creature that should not exist in this world, seemed to fall into a memory at this moment, recalling the events of many, many years ago.

Most of its massive body is hidden in the darkness, but only a part of it is intimidating enough to be intimidating, like a majestic mountain. Lu Chen even subconsciously thought of the various pasts he had experienced in his life, for various reasons, his experience was far richer than ordinary people, and his knowledge was more extensive, including the fact that he had seen some strange creatures that most people in this world had never heard of or seen.

For example, the inaccessible snowy mountain, the legendary wolf, and all kinds of weird monsters hidden in the abyss all make people feel thrilled. However, compared to the black dragon in front of them, those creatures seemed to be normal.

No matter where you look at it, this black dragon is a monster that belongs to the legendary category of human imagination, and it should never have existed in this world.

However, at this moment, Lu Chen faced it so truly, and then heard the dragon's answer: "I'll go to Immortal City." ”

This answer was clear and clear, there could be no other ambiguity, and in fact, this answer was completely in line with Lu Chen's prediction before he set off for here.

Lu Chen clearly remembered that he had asked Tianlan Zhenjun at that time, what if the black dragon didn't agree to come over?

Tianlan Zhenjun smiled at the time and said very calmly: "If it refuses to come, then let it be, but it will definitely come." ”

The facts once again proved that Tianlan Zhenjun's judgment was not wrong, sometimes Lu Chen would wonder if this dead bald head had missed a single decision on a major matter over the years?

At this point, although Lu Chen didn't know why the black dragon wanted to go to Xiancheng, and he couldn't figure out what the meaning of the sentence "the time has come" that Tianlan Zhenjun asked him to convey was, but the most important thing for him at the moment was not to think about what he had or not, but to prepare to take the black dragon to Xiancheng.

Such a giant dragon, if he wants to go to the Immortal City like this, the movement can be described as earth-shattering, but it seems that neither the black dragon nor the Tianlan True Monarch who is far away in the Immortal City has no intention of doing so, and Lu Chen has already been explained, so he quickly threw the Kunlun seal in his hand directly into the air.

The golden seal flipped in mid-air, flew in front of the dragon, and then suddenly stopped, as if grasped by a force. The black dragon's body leaned forward, as if it was about to make a move, but at this moment, its pair of dragon eyes suddenly froze, but it looked up.

"Huh?"

It seemed slightly surprised and slightly surprised, and after a while, the huge dragon head slowly fell down and stayed in front of Lu Chen.

Lu Chen looked at the sharp fangs that were not too far away from him, frowned slightly, took a step back, and then asked, "What's wrong?"

The black dragon stared at him, and after a while, he suddenly spoke, "I smell the breath of black fire. ”

"Black fire?" Lu Chen was stunned, and then his heart was taken aback, and his face changed slightly.

The black dragon didn't continue to talk to him, but stared at him closely, and after a while, suddenly in the dragon's eyes, in the slender and strange snake pupils, a black flame suddenly erupted.

Yes, it was a black fire!

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No one, at least in this world that Lu Chen knows, no one has ever known the source of this black fire power, even if Lu Chen himself has this strange power in his body, but he is still in a very unfamiliar state with the black fire.

He didn't know the origin of the black fire, he didn't understand the origin of the black fire, and he didn't know what the black fire would become in the future, he just used an almost instinctive ability to harness and urge the black fire.

This ancient and strange power has saved him many times, and now it has almost become his biggest and last means of pressing the bottom of the box.

But this black fire power does not belong to him alone, as far as he knows, there are at least three black fire forces in this world, one is the dead fire shaman, the second is the black fire tribe in the distant southern wasteland, and the last one is the black dog Ah Tu who follows him.

What's funny is that apart from the dead Fire Shaman and the Black Fire Clan, the black fire power possessed by Lu Chen himself and Ah Tu is a little unclear and weird, so that they themselves can't explain it clearly.

Until today, Lu Chen suddenly sensed the power of the fourth black fire in this world.

Moreover, the power of this black fire is so powerful, pure, and clean, it seems to be the appearance of the black fire when it was first born, and it naturally carries the ancient wild atmosphere, just like this black dragon.

Then, as if summoned by this primitive but powerful black fire power, Lu Chen suddenly found that the black fire in his body seemed to be out of control all of a sudden, and suddenly rose up, and when he was caught off guard, his eyes also burned with raging black flames.

At that moment, Lu Chen suddenly thought of the experience of the black fire in his body being suddenly awakened one night when he was on Kunlun Mountain a long time ago, and the feeling was almost the same as now.

The black dragon looked at him condescendingly, his eyes seemed to be very complicated, and after a while, he only heard the black dragon say slowly: "Why, Tianlan's disciple does not have his Dao magic power, but the power of our dragon clan?" 10