This sound immediately made Su Yue's nerves tense.

The source of the sound pointed to a dark passage deep underground leading to an unknown destination.

Su Yue and Lu Wei followed the sound until they came to a huge reinforced concrete door.

Two months have passed since the end of the world, and the underground area behind the gate is isolated from the outside world like an isolated island.

Su Yue had no idea what kind of alien creatures were lurking inside.

Su Yue placed his hand on the door, and saw a layer of dark blue barrier rising out of thin air.

It was like an invisible barrier, blocking their way forward.

Then, a cold and mechanical system prompt sound was heard.

[Ding! The shortcut to the special dungeon is ahead. The system detects that you have not yet opened the dungeon, so you cannot enter directly! ]

Faced with the current situation, Su Yue couldn't help but frowned, feeling a little tricky.

"It seems that we have to go through the main gate of the nuclear power plant this time. It's really tricky." He sighed helplessly.

There is a type of high-difficulty copy where they will set up save points in the middle.

Then go through the shortcut door and return to the real world.

If you want to open this type of door, there is no other way unless you activate the save file in the copy.

Su Yue glanced at Lu Wei who was wolfing down her food beside him, and suddenly felt hungry too.

Since landing in the early morning, they have been hiking all the way to the nuclear power plant.

There was almost no time to stop to rest or eat.

So, Su Yue took out a Beijing roast duck and a bottle of cold beer from his bracelet.

He gracefully tore open the wrapping paper of the roast duck, picked up a piece of tender roast duck and put it into his mouth.

At the same time, he took a sip of cold beer. This delicious enjoyment temporarily relieved his fatigue and helplessness.

Afterwards, Su Yue took out the three legendary treasure chests.

Two of them were given as rewards for his and Luvy's survival.

The remaining one was the trophy just obtained from the leader-level alien sandworm.

"Let me see what can be found in these three legendary treasure chests?"

The chance of getting high-level items from such a legendary treasure chest is extremely rare.

Therefore, Su Yue did not have high expectations.

"Alas, as expected, they are all ordinary things!" Su Yue opened two treasure chests in succession without hesitation.

Just as he expected, none of the items inside caught his eye.

When Su Yue's gaze finally stopped on the last treasure chest.

Golden legend!

There actually appeared a long-lost, mythical consumable item inside.

It was a mythical [Master Key].

[Master Key]: Mythical consumable. Yokohama Locksmith, there is no lock that cannot be opened! After using it, you can open locks or mechanisms below the mythical level.

The mythical master key is so rare that it is beyond words.

Its appearance often triggers countless competition, but it is often unsalable.

After all, its application range is so wide that it covers almost all hidden copies within the Blue Star.

Whether it is the ancient ruins hidden deep in the jungle.

Or is it a mysterious palace hidden in the deep sea?

There is even a door to an illusion floating above the sky.

As long as there are locks and mechanisms, nothing can stop the magical power of this master key.

Whatever you think will come true. Speak of the devil and he will appear!

With this "master key", he can break through the numerous obstacles brought by the barriers and travel freely between various secret realms.

Obviously, the door in front of Su Yue can be opened with a master key.

"I'm sorry, I was too loud just now!"

Su Yue's face was filled with joy, and he quickly finished the food in his hand.

When his fingers touched the mysterious door again, the master key suddenly flashed a dazzling golden light.

[Ding! The area ahead is special. Do you want to use the "Master Key (Mythical Level)" to force it open? Please note that once used, the Master Key will no longer exist. ]

Su Yue nodded without hesitation and said firmly: "Confirm to open!"

With a creaking sound, the door of the underground passage slowly opened.

A strong and pungent smell mixed with the high temperature hit me in the face, making it almost impossible to breathe.

And at this moment, the Houyi Sun-Shooting Bow in Su Yue's hand seemed to sense something.

It suddenly shook violently, as if telling some unknown story.

The reaction this time was stronger than any other time before.

Obviously, this is the place where the Yamata no Orochi will appear.

Su Yue brought Lu Wei and stepped into the copy without hesitation.

As soon as they entered, the door behind them slammed shut.

Su Yue looked back and found that the passage door that originally led to the outside world had disappeared into the air.

The environment they were in at the moment was a spacious cave.

There are oil lamps hanging on the walls of the cave, and they seem to be able to sense Su Yue's presence.

Whenever you get close, an oil lamp lights up.

When people leave, the oil lamp will go out.

"Looks like this is the place!" Mu Gui's voice rang out in the silent cave, with a hint of certainty and expectation.

At this moment, a system prompt sound suddenly rang in Su Yue's ears:

[Warning! Warning! The system has detected that "Lone Wolf" has entered an unopened dungeon area by unconventional means. The data is being urgently readjusted.]

This sudden news surprised Su Yue quite a bit.

Even though he has rich experience and broad knowledge.

However, the statement "the copy is not open" was unheard of to him.

Could it be that this has something to do with the fact that the Yamata no Orochi has not yet appeared in the world?

Since this is a copy that has not yet been opened.

The difficulty is so high that it is probably beyond the ability of the Sakura people to cope with it at this stage.

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