Zhou Tianlong and Yu Feilin saw that there was a huge monster in that huge cave. The monster was four or five feet tall, and its body was full of flames, and although its body looked like a human shape, it could not see its facial features, because its entire head was actually a huge fireball that was blazing.

"Is this the Flame Demon? Sure enough, it is exactly what it sounds like, and there are flames all over the body!" Zhou Tianlong and Yu Feilin glanced at each other, and they both saw shock and surprise in each other's eyes. This flame demon is worthy of being a powerful monster transformed from the yin fire under the Nine Shadows, and judging from this terrifying appearance alone, it makes people shudder.

At that moment, a low roar came from the cave. Now that the two of them were so close to the Flame Demon, Zhou Tianlong could hear the Flame Demon's roar more clearly, and it was indeed the kind of "hissing" sound that the flames made when they burned.

"How did this Flame Demon come to be? What does it have to do with flames? Why is there flames burning all over your body? Even the sound it makes is related to flames?" Zhou Tianlong stared at the Flame Demon as he thought to himself in his heart.

However, at this moment, the flame demon seemed to see the two humans outside the cave, and his huge body writhed suddenly, and quickly pounced towards the entrance of the cave.

"Not good!" Zhou Tianlong and Yu Feilin were taken aback. At that moment, Zhou Tianlong didn't dare to hesitate, and hurriedly pinched the seal. Immediately after, the two huge pillars of wind under his feet began to rotate violently, and as the pillars of wind rotated, the winds began to slowly escape from the pillars of wind, and as those winds dispersed, the two pillars of wind also slowly began to fall.

However, there is a certain disadvantage to this Wind Riding Technique, that is, whether it is lifted into the air or descended, it takes a certain amount of time and cannot be completed in an instant.

Therefore, before the pillar of wind could change much, the fire demon had already rushed to the entrance of the cave.

"What should I do?" Zhou Tianlong and Yu Feilin both looked very nervous, and cold sweat ran down their foreheads. Once this flame demon breaks out of the hole, the consequences will be unimaginable. Just imagine, thirty years ago, so many masters were not the opponents of the Fire Demon, let alone the two of them!

However, just as the flame demon was about to rush to the entrance of the cave, suddenly, a transparent light curtain appeared at the entrance of the cave for no reason, and the body of the flame demon rushing forward, because the speed was too fast, it couldn't stop the car at all, and directly hit the top of the light curtain.

"Bang!" came a substantial muffled sound, and the fire demon's body was blocked by the light curtain, unable to break out of the cave.

Seeing that the Flame Demon was blocked by the power of the seal, Zhou Tianlong's faces calmed down slightly. When they saw such a terrifying monster just now, and saw that monster rushing in their direction, they couldn't help but feel a little nervous in their hearts, and in their desperation, they actually forgot that this fire demon was sealed here, and it was impossible to leave the cave casually.

Looking at the transparent light curtain, Zhou Tianlong and Yu Feilin nodded secretly. They knew that this light curtain should have been jointly built by dozens of outstanding disciples from the various sects of the Heavenly Rain Empire thirty years ago, and among them, it was naturally also the credit of Yu Feilin's parents. Although this seal was not as powerful as the seal built by thousands of powerhouses thousands of years ago, it was definitely not to be underestimated. If the Flame Demon wants to break out of this seal, it is simply impossible.

"It is amazing that this fire demon has no eyes in its head, and that it can detect us, just as we cannot see its mouth, but it can make sounds. Zhou Tianlong thought secretly, shocked by the magic of the Flame Demon.

"Hiss......" At this moment, the roar of the fire demon was heard again in the cave, and the voice was full of anger and unwillingness. Immediately after, the Fire Demon began to frantically swing his arms, punch after punch towards the light curtain.

The Flame Demon has been sealed for thousands of years, and it finally regained its freedom, but it was sealed again, and it was naturally extremely angry in its heart, so it tried every means to break the light curtain. However, the power of that light curtain was extremely powerful, and Rao couldn't break the light curtain at all with the power of the fire demon.

"Let's leave!" Yu Feilin said to Zhou Tianlong when he saw that the fire demon was blocked by the light curtain. Now that they have also seen the appearance of the Flame Demon and satisfied their curiosity, there is no need to stay here, the top priority is to immediately find out the evidence that the Wunan Sect unlocked the seal of the Flame Demon thirty years ago.

"Wait a minute!" Zhou Tianlong said suddenly. Yu Feilin was slightly stunned, and suddenly found that Zhou Tianlong frowned, staring at the cave, as if he had found something strange.

"What's wrong?" Yu Feilin was a little puzzled, and hurriedly asked Zhou Tianlong.

Zhou Tianlong frowned and said, "Look, the state of that light curtain seems to be very unstable!"

"What?" Yu Feilin was startled, and hurriedly looked at the light curtain carefully. At this glance, Yu Feilin couldn't help frowning, because she could also see that with the bombardment of the fire demon again and again, the light curtain was fluctuating violently, and the energy ripples spread rapidly from the place where the fire demon bombarded to all directions, and the energy on the entire light curtain seemed to be extremely unstable, and the light curtain looked like it could be shattered by the fire demon at any time.

"What's going on?" Seeing that the situation of the light curtain was worrying, Yu Feilin was very anxious. Once the Flame Demon shattered the light curtain and broke out of the seal again, the consequences would be unimaginable, and the entire Heavenly Rain Empire would once again fall into dire straits.

Zhou Tianlong frowned, staring at the light curtain deadly, not saying a word, not knowing what Lu Dao was thinking in his heart.

"This seal was built by dozens of outstanding disciples of the Heavenly Rain Empire thirty years ago, and in terms of power, it must not be as powerful as the seal a thousand years ago, I can't imagine that after only thirty years, this seal will not be able to hold it. It seems that we must go back to the sect immediately to tell the master and ask him to find a way to strengthen the seal!" Yu Feilin hurriedly said to Zhou Tianlong. She knew that if she wanted to strengthen the power of this seal, she had to rely at least on the master of the Emperor Martial Realm, Yu Dongyang was now a cultivator of the Emperor Martial Realm, and it should be easy to strengthen a seal.

However, Zhou Tianlong shook his head slowly, with a strange light in his eyes, and said to Yu Feilin: "In my opinion, things may not be as you say!"

Yu Feilin was stunned for a moment, not understanding what Zhou Tianlong meant, if it wasn't for the fact that the power of this seal was not strong enough, why would the state of the seal become so unstable after only thirty years.

I only heard Zhou Tianlong say again: "Although this seal built thirty years ago is not as powerful as the seal a thousand years ago, it will never lose so much energy in such a short period of time!

"Then what do you think is the reason?" Yu Feilin asked rhetorically.

I saw Zhou Tianlong smile coldly, a fierce light suddenly flashed in his eyes, and he said to Yu Feilin in a deep voice: "If someone can break the seal for the first time, then he will do this kind of thing for the second time!"

"What?" Yu Feilin's beautiful eyes widened suddenly, and her pretty face changed drastically. At this moment, after Zhou Tianlong's reminder, she suddenly woke up to the fact that there was indeed such a possibility.

"Could it be that this is the work of the Wunan Sect again?" Yu Feilin's eyebrows were furrowed, his silver teeth were crushed, and his eyes flashed with anger. The madness of the Wunan Sect has exceeded her imagination, and for their own selfish interests, they have to push the people of the empire into misery again and again. What they did was simply outrageous.

Zhou Tianlong bowed his head and was silent, his brows furrowed. He also knew very well in his heart that if the first thing was done by the Wunan Sect, then this time it was also done by the Wunan Sect. However, how to obtain evidence that the Wunan Sect had unlocked the seal of the Flame Demon?

"If my expectations are correct, the people of the Wunan Sect will definitely appear in this Red Flame Valley again. It's better to do this, the two of us will wait here for a few days, and if someone shows up and makes a move on the cave that sealed the Flame Demon, we will try our best to catch him, force him to find out his identity, and see if this matter is the work of the Wunan Sect!" Zhou Tianlong thought for a moment and said to Yu Feilin.

Yu Feilin nodded in agreement. After all, the purpose of their coming here was to find out the culprit who had unlocked the seal of the Flame Demon thirty years ago, and if the culprit still wanted to unlock the seal of the Flame Demon this time, then he would definitely appear in this Red Flame Valley.

At that moment, Zhou Tianlong pinched the seal, and the two wind pillars under his feet slowly became smaller, and the two of them returned to the ground. Then, Yu Feilin let go of her pair of jade arms that were hugging Zhou Tianlong and left from Zhou Tianlong's arms. It's just that Zhou Tianlong saw an expression on Yu Feilin's face, which was called reluctance.

"Damn! this Yu Feilin is still addicted to hugging me!" Zhou Tianlong smiled helplessly. After meeting Yu Feilin this time, Zhou Tianlong found more and more that Yu Feilin's attitude towards himself was very different from before, and even seemed to have a male and female affection for himself, which made Zhou Tianlong feel a little inexplicable, and he didn't understand why Yu Feilin, who hated himself to death, had such feelings for himself?

In the days that followed, Zhou Tianlong and Yu Feilin took up residence in this Red Flame Valley, waiting for the suspect who might break the seal of the Flame Demon to appear.

On this day, night had just fallen, Zhou Tianlong and Yu Feilin were cultivating, Zhou Tianlong suddenly opened his eyes, lowered his voice and said to Yu Feilin: "Someone is coming!"