Although the four demon kings are very powerful, they are not the most powerful existence in this world.

It provides them with the best cultivation environment. Similarly, it also has their limitations, because after reaching this step, they have no stronger people to surpass.

This question is not the first time Xu Feng asked the fire demon king, but every time the fire demon king answered, Xu Feng was disappointed, and this time is no exception.

"I always believe that only the strong who grow up under the ravage of storms can become strong. The flowers in the greenhouse are always easy to wither!"

Looking up at the faint stars in the sky, Xu Feng said slowly.

Along the way, he suffered a lot, but anyway, he insisted, and his strength was much stronger than that of ordinary practitioners. It was the strength of this step by step and constantly strengthening his heart that made him come slowly without stopping.

"Do you think this is a greenhouse? Sometimes the killing here is also very cruel!"

The fire demon king said quietly. He didn't forget how he climbed up step by step.

His cultivation talents and qualifications are not as good as the other three demon kings. He can go to this point. I don't know how much blood essence he spent and the demon cultivation of his peers he killed.

It is precisely because of his solid foundation and incomparably strong body that he has a certain position among the four demon kings.

"No, I mean, now you've reached the extreme of your cultivation in another cave, and no one is your opponent anymore. Why don't you give up the position of demon king and go out to the outside world to find a stronger opponent?"

Xu Feng knew that the fire demon king misunderstood his meaning and quickly explained that this sentence really moved the fire demon king. The light in his eyes flashed past, and then asked, "in the outside world, there are people more powerful than me?"

"Yes! And many of them are my enemies. Although I have never seen them, I am sure that their strength is definitely in the same state as you!"

Thinking of Murong's family, Xu Feng nodded firmly, and a trace of hatred overflowed from his words.

To win over the fire demon king, in fact, Xu Feng also has a little private trust. After all, whether Murong family or those non born reclusive families, there is a certain threat to Xu Feng. With his current strength, he has no way to compete with it.

Xu Feng naturally wants to attract more powerful people before he can compete with those powerful families. Otherwise, how can he clamor for the hidden families when the war begins?

"Unexpectedly... There are such powerful people!"

With a sigh, after the fire demon king pondered a little, he opened his mouth and said, "I promise you, when your work is finished, I will leave here with you, go to the outside world and leave this unique cave to their three demon kings to compete!"

Before agreeing, Xu Feng had explained the meaning of wooing the fire demon king in a very obscure way, but after listening to it, the fire demon king did not hesitate at all, but agreed, which showed his attitude towards Xu Feng!

After listening, Xu Feng looked at the fire demon king with gratitude, but didn't say anything. He has deeply remembered this friendship in his mind. If he has the opportunity to repay, he will definitely repay it!

The next time, Xu Feng lived in the cave of the fire demon king. Most of the time, he was exchanging views with the fire demon king. When they were tired, they would sit on the grassland and talk about some happy past events.

"The outside world is really wonderful!"

When the fire demon king heard Xu Feng introduce every food, wine and beauty, his eyes should shine blue.

As the saying goes, everyone loves beauty. Although the fire demon king is a demon, he still cares about food, wine and beauty, especially beauty

After staying for about ten days, he felt that the time was almost up. Xu Feng left the cave of the fire demon king with Qingqing. As soon as he left, Xu Feng showed the ghost dance and hid in the void with Qingqing.

The most powerful thing of the white eagle king is investigation, which was warned by both the moyao demon king and the fire demon king. Xu Feng naturally did not dare to neglect it, so as soon as he left, he showed the ghost dance.

There is a unique cave, not Nanling. This is the world of the four demon kings. All demon repair should follow the lead of the four demon kings. As soon as Xu Feng appears, I'm afraid it won't be long before the white eagle king and the mouse king will get the news. At that time, the two demon kings wanted to kill him. It's not too simple.

According to what the fire demon king and the moyao demon king said, Xu Feng walked directly in the direction of the ancient tree and met many powerful monsters along the way. Their spiritual knowledge was very sensitive and seemed to feel a sense of Xu Feng's proximity.

But Xu Feng was also very resourceful. He slowly learned how to avoid those demons. After walking for about a day and a night, the surrounding spiritual power became stronger and stronger, but he saw that there were streams flowing clear water on the ground.

At first glance, there is nothing wrong, but as long as you observe carefully, you will find that these streams are condensed by the spiritual power of heaven and earth, just like the waterfall in the cave of moyao demon king.

However, no demon Xiu around the stream dared to get close to those streams, not because of the danger, but because these spiritual powers are too strong. From their strength, they can't bear those powers at all. As long as they absorb a little, I'm afraid they will explode and die.

"It seems that as long as you follow these streams, you can find the legendary ancient trees!"

Xu Feng thought to himself in his heart. He couldn't help quickening his pace in the void.

After another day's journey, Xu Feng felt the pressure from the powerful spiritual force. His face and body were soaked with sweat. It can be imagined how powerful these spiritual forces are.

Today's Xu Feng is like in the belly of a strong man. No matter how he can't escape the control of that strong man, this feeling is the first time Xu Feng has met him.

Different from Xu Feng's sense of oppression, Qingqing standing beside him seems very calm. In her eyes, Xu Feng seems to see a look of enjoyment.

"Does... Such a powerful spiritual power have no effect on Qingqing?"

Xu Feng was shocked. This spiritual strength was already beyond his level of practitioners, but Qingqing, a little girl, was not affected.

Think of what moyao demon king and fire demon king said at the beginning. Even they will feel oppression here, but Qingqing doesn't. does this mean that Qingqing's strength is stronger than the last two demon kings?

"Brother, are you uncomfortable?"

Seeing Xu Feng's eyes, Qingqing smiled and gently held Xu Feng's hands. A cold feeling spread all over Xu Feng's body. The next moment, the sense of oppression in Xu Feng's body retreated like a tide and disappeared without a trace.

"Qingqing... What exactly are you from?"

At this time, Xu Feng couldn't help being angry and asked.

Qingqing, who seems innocent, has too many secrets. Although Xu Feng represses himself again and again, don't think about it, he can't help thinking when Qingqing makes such a surprise.

At this moment, Xu Feng couldn't help it anymore. He just wanted Qingqing to tell him what was going on.

"Well... Qingqing can't tell you!"

A look of surprise flashed in Qingqing's eyes, but he soon recovered his calm and lowered his head. Said a word gently.

A trace of coolness came from his heart. Xu Feng also recovered a little sober. After being stunned for a while, he said, "it's all right. You'll always be my sister!"

After that, Xu Feng took the initiative to hold Qingqing's hand and continued to walk towards the front.

No matter what Qingqing's identity is, he is Xu Feng's sister. The reason why he slipped up just now is that he is too curious.

At the moment of seeing Qingqing's eyes, Xu Feng knew that Qingqing had difficulties, so he realized that he shouldn't ask.

Without that sense of oppression, Xu Feng moved a lot faster, or because of the episode just now, they didn't speak again. Along the way, they were silent, and there seemed to be a trace of disagreement in their hearts.

When she stopped again, Qingqing said, "little brother, I know it's bad to hide you, but when it's right, I'll tell you!"

"I see!"

Gently touched Qingqing's head. Xu Feng said fondly. Now Qingqing is like a child who has done something wrong, asking for his forgiveness.

Everyone has his own secret, Xu Feng is no exception, and Qingqing's identity is like a fog.

All along, Xu Feng regarded Qingqing as his sister, but some ignored her privacy.

"My brother won't blame you. No matter who Qingqing is, she is my sister!"

Seeing that Qingqing was still a little nervous, Xu Feng added another sentence. After hearing this sentence, Qingqing smiled and resumed her old smile again.

"That's good! Qingqing will always be the little brother's sister!"

After eliminating the unhappiness in their hearts, they continued to move forward. After walking for about a quarter of an hour, Xu Feng stopped, turned to Qingqing and said, "Qingqing, take back your power on me. I want to try how powerful it is!"

"But..."

After hearing this, Qingqing felt a little worried, but Xu Feng nodded and said, "it's okay. I'm confident. Just take it back a little!"

Xu Feng felt extremely great oppression from the pressure outside. Now Xu Feng wants to feel how powerful the power is here. Otherwise, the pressure in the legendary ancient tree will be stronger. Now here, it is a preparation in advance.