Just when Zhao Long and Zhu Tianhao were fighting for it.

The high-ranking members of the Zhu family at the door of the underground secret room were all looking at the dark entrance of the cave with sad faces, communicating with each other.

"Do you think this Zhao Long can explore the entire underground secret room with Tianhao?"

One of Zhu Tianhao's uncles frowned, although the combination of Zhao Long and Zhu Tianhao was their greatest hope at the moment,

But they are still a little unoptimistic.

It's hard to say, this underground secret room is too mysterious.

If it hadn't been for the accident, we wouldn't have found out. Who built it? ”

As Zhu Tianhao's father, Zhu Wei also had a tense face, and they had no clue about everything in this underground secret room.

As the great elder of the Zhu family, Old Man Zhu Shan was silent at the moment, his head was lowered, and his constantly flickering eyes showed that he was contemplating, and everyone did not dare to disturb.

Not to mention Zhu Wei and them, even the old man Zhu Shan himself is very unclear about the origin of this underground secret room.

After discovering it, he had found many classics, but there was no record of this in the Zhu family's classics.

But he always felt that this underground secret room had a deep relationship with their Zhu family.

It may have been established by a senior of their Zhu family.

It's just that the difficulty of establishing this underground secret room is definitely not something that ordinary Sword God Emperors can do.

No one knew better than Zhao Long the difficulty of establishing this underground secret room.

Because even if Zhao Long had the strength back then, he couldn't do it at all.

Every time he took a step forward, the more doubts became in Zhao Long's heart. He felt more and more that this underground secret room was not simple.

That is, he and Zhu Tianhao have combat power far beyond their own rank.

If you change to any two ordinary Sword Lords, even if you are not killed by a second-order demon beast, you will have to die of exhaustion.

The demon beasts inside haunted one after another, which suddenly made Zhao Long feel that this was a place of trial.

Specially designed for people to fight monsters.

Zhu Tianhao used to train in this underground secret room, plus the knife skills he learned, although he couldn't compare to Zhao Long?

But with his strength of the Sword Monarch One Heavy Heaven, there is no problem in dealing with the ordinary Sword Monarch Five Heavens.

Of course, if the other party is smart enough, Zhu Tianhao, who has rarely really fought with humans, is likely to suffer a big loss.

Everything in battle is fast-moving, and victory depends on the specific situation at the time.

This underground secret room allowed Zhu Tianhao to hone his powerful combat ability.

But at the same time, it also made him lose the ability to react on the fly, but overall it was a good place.

"Tianhao, you see there is a door in front, there seems to be a light coming from behind the door, let's go over and take a look."

When he turned a corner, Zhao Long immediately found the door in front of him.

Zhu Tianhao nodded, but before they could pass, they had to deal with the three running bulls in front of the door.

As soon as they saw the arrival of Zhao Long and Zhu Tianhao, the three running bulls that were originally crawling on the ground immediately stood up and roared at the two of them.

Zhao Long and Zhu Tianhao, who had fully grasped the weakness of the Running Bull, how could they be bumped into by the Running Bull with low intelligence?

immediately dodged, and according to the previous method, he rushed directly to the melee battle, and the wild bull was solved with three strikes and five divided by two.

After solving the problem, Zhu Tianhao was about to push open the door immediately, but no matter how hard he tried, he couldn't push it open.

Zhao Long also discovered such a strange situation, he had never been here.

Of course, I don't know what type of formation this arrangement is.

Based on his previous experience, it is likely that this door is arranged with a formation to test strength.

In other words, it is the same as the formation in the cave in the deciduous forest.

As long as you reach a certain level of strength, you will be able to blast through the formation.

"You get out of the way first, let me try!"

Zhao Long didn't know how many requirements this formation needed to meet to test strength, so he first used the strength of the sword master-level force.

A sword force blasted down, and the door just lit up, but it was annihilated without any reaction.

"Sure enough, there is a formation, but it's a pity that it's not at the level of a sword master."

Zhao Long immediately changed to the strength of the Sword Monarch level and blasted down again.

Unlike the first time, this time the door was lit up a little longer, and the door moved down slightly.

Although the range of movement is very small, it is still discovered by the careful Zhao Long.

It seems that this formation is really right, it is a formation for testing strength.

"Tianhao, you dodge, I'm going to use the most powerful sword technique!"

Zhao Long groaned secretly, it seemed that if he wanted to meet the requirements of the formation on the door, he needed at least the strength of the Sword King level.

With Zhao Long's current strength, it is not difficult to achieve this strength if he goes all out.

Zhu Tianhao also saw what Zhao Long meant, and hurriedly took a few steps back.

And he looked at Zhao Long with dead eyes, eager to understand Zhao Long's true strength!

Taking a deep breath, the sword yuan power in Zhao Long's dantian instantly gathered, and a red light lit up from the Heavenly Frost Knife: "The sword breaks through the nine heavens!" ”

With Zhao Long's angry shout, a powerful sword qi erupted from the Heavenly Frost Knife in an instant.

Then he slammed into the door in front of him in Zhu Tianhao's horrified gaze.

"Boom!" The formation on the door worked instantly, and the dazzling light lit up.

The door, which had only moved a little, finally revealed a gap and began to turn slowly.

Zhao Long, who had withdrawn the Heavenly Frost Knife, was very happy to see this scene, and it seemed that his guess was not wrong.

But his smile was gone before it could fully bloom.

The door that had been moving slowly stopped suddenly.

Zhao Long couldn't help but be stunned, why did this door stop?

Soon, Zhao Long understood that he was not the real sword king after all.

Although the power will be able to reach the level of the Sword King, there is actually a huge gap.

So the door only moved a few centimeters before stopping.

How can people get by with these few centimeters? Zhao Long couldn't help but smile bitterly.

Zhu Tianhao on the side didn't pay attention to the door in front of him, and all his body and mind were on Zhao Long.

He could see clearly that just now Zhao Long didn't even have a second before and after from drawing the knife to releasing the sword qi.

When he first fought with Zhao Long, his spirit was on the verge of collapse, and he didn't notice what Zhao Long was doing at that time.

Now standing on the side, I saw Zhao Long's sword breaking through the sky again.

Only then did he notice that Zhao Long hardly had any preparation time when he used his sword skills.

That is to say, when his Hybrid Yuan Slash was still condensing the sword element power and preparing to release it.

The sword qi emitted by Zhao Long was probably already hitting him.

Zhu Tianhao has completely lost confidence, and Zhao Long is really terrible.

Not only does he have the emperor-level advanced sword technique to break through the nine skies, but he also has the flying knife skill that has been lost for many years.

When he thought that this was all Zhao Long's strength.

Unexpectedly, he found out again that Zhao Long didn't need any preparation time to perform his sword skills.

Any one of them is enough to make an ordinary knife maker an extraordinary knife master.

But Zhao Long actually had them all. He was completely speechless, and his heart was left with loss.

When he first saw the gap between him and Zhao Long, Zhu Tianhao was thinking about catching up.

Later, it turns out that the gap between him and Haitian is even bigger than he imagined.

Zhu Tianhao's heart has changed to envy and jealousy.

But now that the gap is so big that it is impossible to catch up, Zhu Tianhao is already desperate and looking up in his heart.

At this moment, Zhao Long didn't notice Zhu Tianhao's thoughts, and looked at the gate that only exposed a few centimeters.

"Tianhao, I think there may be another formation on this door, if it is a sword monarch under the age of twenty, the difficulty is too high?"

Seeing that there was no response to his analysis, Zhao Long couldn't help but look back.

Seeing Zhu Tianhao bowing his head and pondering, he asked strangely: "Tianhao!" Tianhao, what's wrong with you? ”

"No, nothing. What did you just say? Zhu Tianhao, who came back to his senses, hurriedly covered up.

Zhao Long could see at a glance that Zhu Tianhao must have something on his mind, but he didn't ask in detail if he didn't say it.

After all, it's always rude to ask someone what's on their minds, but what he doesn't know is.

The strength he showed just now had completely convinced the arrogant Zhu Tianhao.

"I think there must be another way to open this door, I just tried."

If you want to blast open this door, you must at least have the strength of the Sword King, even if we are far from it.

Twenty-year-old sword king, does it exist on this continent? Seeing Zhu Tianhao's question, Zhao Long said his analysis again.

Listening to Zhao Long's words, Zhu Tianhao shook his head disapprenously.

"A genius like me, it's very good to be able to cultivate to the Sword Monarch at the age of eighteen."

"But a genius among geniuses like you, it's not impossible to cultivate to the Sword King at the age of twenty."

Zhao Long looked at Zhu Tianhao in surprise, he didn't expect him to say this.

He remembered that Zhu Tianhao was unwilling to admit defeat before, why did he take the initiative to admit that he was inferior to himself now?

Before Zhao Long could figure out the reason, Zhu Tianhao agreed with his analysis just now.

"But what you said is very reasonable, with our current strength, it is difficult to open this door."

I think there must be other ways.

Zhao Long didn't think too much about other things, and the top priority was to pass through this door.

He carefully looked at the door in front of him, and the whole body was made of ordinary stones.

But there are many intricate patterns carved on it. Zhao Long understood that these were the formations on the stone gate.

If he wants to destroy these formations, his current strength is not enough at all, there must be more ingenious methods.

A gap in the stone door quickly attracted Zhao Long's attention, this gap was very special, it was almost like a keyhole.

Keyhole? Zhao Long was suddenly startled, and hurriedly looked around, this stone door must have a key to open.

He is accustomed to brute force cracking, but he has forgotten this basic common sense.

Now that brute force can't be cracked, then the only way to go is to follow the normal way.