Zhao Long and Zhu Tianhao carefully searched for the surroundings, except for the glittering luminous bricks, there was not even a single hair, let alone a key.

Judging by the keyhole in the stone door, the key must not be too small.

In order to test the depth of this keyhole, Zhao Long inserted the Heavenly Frost Knife into this keyhole.

Surprisingly, after inserting the Celestial Frost Knife into it, only one handle was exposed.

And the entire keyhole turned out to be roughly equal to the Tianfrost Knife.

Zhao Long and Zhu Tianhao glanced at each other strangely, and Zhao Long hurriedly turned the Tianshuang Knife in his hand.

It's just the Heavenly Frost Knife inserted in the keyhole, even if Zhao Long exerts all his strength, it doesn't turn in the slightest.

"It looks like the Frost Knife can't be the key."

Zhao Long smiled, pulled out the Tianshuang knife, and put it in the storage ring.

"I'll try it too." Zhu Tianhao said and inserted his Tianhao knife into it.

It's a pity that this Tianhao knife is the same as Zhao Long's Tianshuang knife, and it can't turn at all when it is inserted.

In other words, the Tianhao knife cannot be the key to this stone gate.

Zhu Tianhao pulled out the Tianhao knife in disappointment: "It's a pity, but this keyhole is also strange." ”

"Actually, we have two swords, and the knife just shows only one hilt when we go in."

"Knives?" Zhao Long's eyes suddenly lit up, and he said happily, "That's right, it's this!" ”

Under Zhu Tianhao's puzzled gaze, Zhao Long took out the scabbard made of marble that had been stuffed into the storage ring before.

Zhu Tianhao is not a fool, and when he saw this, he immediately understood what Zhao Long meant.

The knife they had obtained earlier before the second entrance was most likely the key to the stone door.

Zhao Long couldn't wait to insert the scabbard in, but the scabbard was completely submerged in the keyhole.

Without revealing his head at all, Zhao Long immediately woke up: "It seems that the Heaven Rank Intermediate Knife is also together." ”

"Yes, you wait here for a while, and I'll go back and get the knife."

Saying that, Zhu Tianhao left immediately, and Zhao Long was not impatient.

Then sat down cross-legged and quietly waited for Zhu Tianhao's return.

Zhu Tianhao, who realized that the Heaven Rank Intermediate Knife might be the key to the stone door, immediately returned to the entrance of the underground secret room.

As soon as the high-level officials of the Zhu family saw Zhu Tianhao come out, they were immediately overjoyed, but Zhu Tianhao didn't see Zhao Long come out behind him.

Everyone's faces changed suddenly, and their hearts sank, could something happen to Zhao Long?

Seeing that the faces of the high-level members of the Zhu family were wrong, Zhu Tianhao immediately understood that they wanted to be crooked.

Hurriedly said: "Zhao Long, he's fine." We found a little bit of a situation. ”

"Grandpa, hurry up and give me the Heavenly Rank Intermediate Knife Weapon I got from the underground secret room that day."

"Heavenly Rank Intermediate Knife Weapon? What are you going to do here? Old Man Zhu Shan was slightly surprised.

The Tianhao knife in Zhu Tianhao's hand is a heaven-level high-grade knife.

It stands to reason that he didn't need to change to a Heaven Rank Intermediate Blade.

Doubts are doubts, but he is not ambiguous.

Immediately took out the treasured Heavenly Rank Intermediate Knife from the storage ring and handed it to Zhu Tianhao: "What happened?" ”

At this time, Zhu Tianhao didn't have time to explain, took the knife and ran into the underground secret room.

I only heard a voice coming from afar: "I'll come back and explain to you later." ”

The high-level officials of the Zhu family looked at each other, and they were all confused by Zhu Tianhao.

But they are all more curious, what happened? Let Zhu Tianhao have such a performance?

No matter what happened to the high-ranking members of the Zhu family, Zhu Tianhao, who had obtained the Heaven Rank Intermediate Knife Weapon, immediately returned to Zhao Long's side.

The fast back and forth ran back and forth made him already a little out of breath: "Here, it's this knife." ”

Taking the knife from Zhu Tianhao's hand, Zhao Long looked at it carefully, this knife seemed to be no different from other knives.

If I had to say something different, only the handle of the knife is carved with a strange pattern.

Zhao Long didn't waste any more time, and after a few glances, he inserted the entire knife into the scabbard that had entered the keyhole.

I only heard a crisp click, and the stone door, which had not moved at all, suddenly lit up.

Zhao Long and Zhu Tianhao glanced at each other in surprise, they were not wrong.

This Heavenly Rank Intermediate Knife Weapon, along with the scabbard, is probably the key to this stone door.

Even the key is a Heaven Rank Intermediate Knife Weapon, so it is conceivable that there must be a richer treasure hidden behind it.

Even Zhao Long, who had many precious sword skills and knife weapons, had already begun to be tempted.

In Zhu Tianhao's expectant gaze, Zhao Long turned the handle of the knife vigorously.

This time, there was no obstacle to the hilt, and in the sound of "crunching", the hilt was rotated ninety degrees by Zhao Long.

"Boom, boom, boom", a series of violent sounds came instantly,

The stone door, which had only moved a few centimeters under Zhao Long's full force, finally began to move in its entirety, and the underground secret room began to shake violently.

This shaking also spread to the high-level officials of the Zhu family who were waiting at the entrance.

They looked at each other in horror, both realizing that there might be a upheaval underneath.

It's a pity that the formation at the door makes it impossible for them to enter, so they can only wait here anxiously.

The "boom" continued, and the heavy stone door had opened a gap large enough for one person to pass.

Zhao Long and Zhu Tianhao did not act, and waited faintly excitedly for the stone door to be completely opened.

In a few moments, the stone door was completely opened.

Zhao Long and Zhu Tianhao glanced at each other and cautiously walked behind the stone gate.

The more moments like this, the more you need to pay attention.

People are most likely to fail when they are about to succeed, and this is when people's vigilance is the lowest.

There are too many such stories in history, Zhao Long, who has the soul of the sword god.

Naturally, he would not make such a mistake, and even with Zhu Tianhao, he was extremely cautious.

As soon as he stepped through this stone door, Zhao Long immediately found that it was a huge enclosed room.

There is only one entrance and exit from this door. The walls around it, like the outside, are made of glow-in-the-dark stone.

"Descendants of the Zhu family, you are finally here! I've been waiting too long. ”

Just when Zhao Long and Zhu Tianhao were cautiously looking at the room.

In the middle of the room, a light suddenly lit up, and an old voice rang out.

Zhao Long and Zhu Tianhao were startled and hurriedly prepared for battle.

I saw that the light in the middle gradually dissipated, forming the phantom of a white-haired old man.

Zhao Long frowned, he felt that this old man was very powerful.

There is a faint feeling in his heart that even in the past, he may not be able to do it.

As soon as this thought appeared, Zhao Long himself was startled in his heart. Better than the past? How is this possible?

In the past, although he was not the number one master in the Sword Continent, he was also one of the few people standing at the pinnacle.

And the old man in front of him would give him such a feeling.

Seeing the phantom of this old man, Zhu Tianhao was also taken aback, and asked reflexively, "Who are you?" ”

"I am the ancestor of your Zhu family, Zhu Yilong! I've been waiting for you for a long time. ”

The old man sighed, as if he were lamenting his boundless years.

It's just that Zhu Tianhao fell into contemplation at this time, and the name Zhu Yilong was very unfamiliar to him.

He hadn't heard the name in at least ten generations, and he didn't know if what he said was true or not.

However, Zhao Long kept looking at the illusory old man in front of him, and he felt that the old man in front of him was not a real person.

Rather, it is a body formed from energy that allows the soul to exist temporarily.

As long as it is a sword god, this move can be regarded as the last life-saving sword skill.

It's just that the sword yuan power consumed by this sword skill is very huge, and even the vast sword yuan power of the sword god can't support it for a few seconds.

However, ten seconds had passed since the old man in front of him appeared.

The more Zhao Long thought about it, the more horrified he became, who was he? How could it have existed for so long with this energy body?

As if he saw the thoughts in Zhao Long's eyes, the phantom old man was also a little surprised.

However, he didn't pay attention to Zhao Long, but directly aimed at Zhu Tianhao.

It seems to know that Zhao Long is not a descendant of their Zhu family.

"What's your name?" The phantom old man Zhu Yilong asked with a pleasant face.

Regardless of whether this old man is a senior in the family or not, the huge power he exudes is not fake.

Zhu Tianhao didn't dare to be disrespectful: "Junior, Zhu Tianhao." ”

"That's right, I was able to cultivate to the Sword Monarch at the age of eighteen, and I was just like that back then.

The fact that you were able to get past the front and get here is a testament to your strength.

If you had been chased by those galloping bulls and gone the other way, you wouldn't have seen me. ”

Zhu Yilong seemed to like Zhu Tianhao very much.

Zhao Long, who had been silent, was keenly aware of the problem in the old man's words.

He asked, "What does it mean to go the other way?" ”

The old man Zhu Yilong glanced at Zhao Long with interest: At that time, after you entered the second gate.

Didn't you encounter the pursuit of a large group of running bulls?

If you were being chased, you would have found another door. Of course, there was only some garbage in that door.

"Trash?" The corners of Zhao Long's mouth trembled slightly.

He didn't know what level of garbage the peerless master in front of him was talking about.

But he went on to ask, "So what if we were chased by that group of running bulls?" ”

"You must know that when the group of wild bulls hit, even the Sword King can't resist it."

As if he understood what Zhao Long meant, the phantom old man smiled: "Those wild bulls are all phantoms, and you won't be really attacked."

Of course, once you get hit by the Running Bull, "the formation will send you outside." ”

Hearing this, the corners of Zhao Long and Zhu Tianhao's mouths twitched slightly, this old man is too powerful, right?

Others may not know, but Zhao Long is quite clear that it is quite difficult to arrange the teleportation formation.

For the formations that were difficult for those formation masters on the Sword Continent to arrange, he seemed to have no effort.

Who is this old man in front of him who calls himself Zhu Yilong?