I don't know how many tons of stone table moved aside by itself, without making a sound.

An underground passage about two meters wide appeared in front of Charles's eyes, and it was pitch black, bubbling with a chill and musty smell.

After a little ventilation, he cautiously walked inside.

He didn't use the lights, but turned on his mental power, relying on his spiritual power to explore the way.

The devil knows if there are defenses or magic in it, and it's better to use mental power to probe the surroundings than to use your eyes.

I don't know how many years no one has been here in this passage, and there is a thick layer of slightly damp mud on the ground.

After walking for about ten meters, an object-sized suitcase by the wall caught Charles's attention.

It was a crystal stone made of very low purity crystals, and several magic arrays were engraved on it.

It was shattered, and the broken crystal pieces were scattered all around, so that the magic circle on it was also missing??。

Charles carefully examined the magic circle above it and found that there was a lighting magic at that time.

It's just that this magic array has an extremely long history, and it looks very rough and backward from the current perspective, with the characteristics of large area, high energy consumption, and low brightness.

With the development of magic technology, it is now possible to achieve the same lighting effect with a magic circle the size of a fingernail.

Judging from the history of the development of magic, the technology of this underground passage is at least a thousand years, and it was often used by people in the past, but it was abandoned for some reason.

The ancient magic lamp didn't provide much clue, and Charles continued his way into the depths.

The ground inside the passage maintains a considerable slope, and the depth of the underground is not small.

As he continued to dig deeper, he noticed a little problem.

There is a magic street lamp every ten meters or so, and they are all destroyed, and it seems that the same person did it.

The ventilation port here has failed, and it has been blocked after years of maintenance.

Fortunately, Charles had prepared for underwater warfare, and he took out an oxygen tank to use it.

He was a little curious if the people who came in behind him would hang here because of lack of oxygen.

After walking almost three hundred meters, Charles was taken aback by what appeared in front of him.

It was the remains of a wolf-like monster that appeared to have been killed, and the bones of one leg and head were a little far from the bones of the torso.

He examined it closely, and there was nothing on the floor except for bones and a metal clasp that was supposed to be on a collar, and there were several signs of damage from the attack on the wall.

The location of this passage is limited, only two meters wide, and if the troops cannot be used, they can only fight a refueling battle, and the wolf on the ground is probably the cannon fodder at the forefront.

Charles began to concentrate his mind, and the fact that there had been a battle in this place showed that there might well be something terrible at the end.

The island has a long history, and you may be able to dig up some antiques.

There was an unknown in front of him, and a thief in the back, and his heart beat a few times, giving birth to a sense of excitement of treasure hunting.

It's just that Charles continued to walk forward, and there was no sign of a battle on the ground.

This made him feel strange, and it shouldn't be.

Eventually, Charles walked more than 500 meters and came to a stone door.

The materials used for this door are lackluster, just mediocre stone slabs.

But the mountain is not high, there are immortals, the water is not deep, there are dragons and spirits, this stone door is engraved with dense words, showing that it is not good.

A faint light lit up, and Charles adjusted to the light and took a closer look at the words by the light of the magic lamp.

To Charles's surprise, the stone door was engraved with demon characters, which had a long history and were similar to those used by Artoria.

So he carefully read the words, which were small and not very old, and could be read clearly. But they have an extremely high repetition rate, apparently repeating a sentence in a constant loop.

After seeing the meaning of these demon words clearly, Charles was so shocked that he was stunned for a moment.

That's when ......

"Huh!"

A dagger was pressed against Charles's neck, the sharp blade cutting through his skin slightly.

A female voice behind him asked, "What's behind the door?"

Charles shouted in a panic, "Don't ...... Don't kill me, I'll say anything!!"

He also wears an oxygen mask and speaks in a "buzzing" voice.

The dagger on his neck was a little harder, and the cold female voice said, "Say it quickly!"

Charles nervously shouted, "I don't know what's behind the door!"

"I really don't know?" the woman's hand was a little heavier, "And where did you get your map from?"

Charles's body shook a little, hesitating whether to say it or not.

It was just the feeling of bleeding from his neck that he had to speak: "That map was stolen from the principal's office......"

"You're lying to me!" the woman growled.

Charles hurriedly shouted, "I didn't lie to you! Today I brought lunch to the principal, and when he went to the bathroom, I saw a corner peeking out of the paperbook on the shelf, and I secretly took it out!!"

The woman asked, "What is written on the door?"

"I don't know!" cried Charles tremblingly.

According to the process, people who don't know anything can easily be silenced so as not to get in the way.

Sure enough, he suddenly felt a fingernail scratch on the back of his neck, and then his body went numb, and then he pretended to fall.

By the light of the flashlight that fell on the ground, Charles saw that the woman who had been following him was wearing a night dress, her head and face were covered.

The woman frowned at the dense text on the door, it seemed that she didn't know the demon script, and she couldn't read the lines on the door, "I swear never to take Lily in danger again, otherwise I will live behind the door for the rest of my life —— Tom McGardenen".

But that didn't stop her from making the next move.

This door was just an ordinary stone door, and it was pushed open with a little force.

There was a sound of running water coming from behind the stone door, and a dizzying smell poured out of it.

At this moment when she lost her mind, Charles jumped up from the ground and slapped her "peach" hard, slapping her into the main sewer of Wisteria Academy.

At this time, Charles roughly understood the intentions of Old Man Wolfe.

According to his speculation, a long, long time ago, Grandpa Ru accidentally learned that the stone table could be opened or something, and then he took Grandma Ru to explore here, but something happened, and Grandma Ru was almost finished.

The corpse of the wolf that I encountered on the way just now is probably left behind at that time, but why there is a wolf here, I can only go back and ask Old Man Wolf.

And these dense words engraved on the stone door should be part of Grandpa Ru's punishment afterwards.

As for why you use the demon language, maybe it's because there are more strokes.

Someone had the experience of writing a form on the construction site until his hand cramped, and now that he thinks about it, Grandpa Ru estimated that his hand was going to be broken when he carved these words on the stone door.

And Mr. Wolf asked Charles to come here, apparently to ask him to come and see the handwriting left by his grandfather back then, so that he would not put Diana in danger in the future.

Everything was in the old man's plan, but there was one more person on the way who thought Charles was looking for treasure, and then stepped in.

After a "poof", Charles quickly closed the stone door, and then threw a few ice mushrooms to freeze the door closed.