"What's this?"

"A hole. ”

"I know it's a hole! I mean what this hole is for, why it's here!"

Su Wen didn't answer Ellie again, but took two steps on the mirror, carefully observing the situation of the cave sealed by the mirror.

The diameter of the whole mirror is about ten meters long, and it is not too regular and round, and it looks like a slightly glowing piece of glass, flat and thick.

It's a bit suspicious that such a thing would appear in such a no-man's land.

And the magic power circulating in this mirror, Su Wen couldn't feel it at all. This mirror is like being able to isolate perception, if it weren't for the idea of going underground on a whim, then Su Wen would never have discovered this cave.

It's like...... It's like someone is deliberately hiding this cave.

What is even more suspicious is that this trade route north of Snow Castle has stretched for many years, but no one has ever discovered this cave in the no-man's land at the junction of the three countries.

There are two possibilities, one is that it was a being, built improvised during the time of the caravan's detour, and the second is that the cave existed before the trade route was formed......

Just as Su Wen was thinking about whether to break the mirror, or bypass the mirror to explore the situation in the cave, Ellie had already squatted down and knocked the mirror under her feet with her hand, making a crisp sound of "bells".

And the magic that glows slightly in the mirror is also rippled like ripples under this knock.

"Wow! It's so deep down there!"

Su Wen had the feeling of standing on the glass corridor of some mountain and river scenic spots. He remembered that when he went to those high-altitude glass corridors before, he had a lot of psychological struggles, and when he finally stood up, he was also a little weak, after all, it is human nature to be afraid of heights. But now standing on the mirror surface of this unknown material, he is not afraid at all, and it can even be said that there is no fluctuation in his heart!

"Looks like there's something down there!"

Ellie's head was almost pressed against the mirror, her eyes widening as she surveyed the cavern. With her night vision, the dark and low-light environment is not an obstacle at all.

"Shall we go down and have a look?"

"You are also a big heart......" Su Wen sighed, although he did not refute Ellie's proposal, but still informed her of the possible risks: "This kind of closed cave, the composition of the air in it is unknown, what if it is poisonous? What if it is biogas......"

"What is biogas?"

“...... It is a flammable and explosive gas, and in addition to biogas, there are other dangerous gases. Even if the air inside is circulating with the outside world, what if there are any dangerous monsters inside? What if it is the hole of the Great Demon King? Have you considered the consequences?"

Su Wen's reminder, if it was said to ordinary people, might have some effect, but the object of his information was Ellie.

Poison: What kind of thing, can you eat it?

Can an incendiary explosion blow through an exoskeleton armor?

Monsters? It's a big deal to fight! If you can't win the fight, there is Su Wen!

The thought of the monster made Ellie a little excited. Just as humans eat and reproduce, hunting is also one of Ellie's physical instincts.

"Do you want to move your muscles?" asked Su Wen as she looked at Ellie's fist-rubbing appearance.

"It seems like there's a little. Ellie thought for a moment and said, "But it's not all ...... I don't know why, but I seem to go to this cave to have a look! There's no reason, I just want to go ......."

After all, the material of the body is a "hole" worm.

"Then you stand out a little. Su Wen raised his fist as he walked towards the edge.

He wanted to try to smash the mirror with his fists, but he didn't have much hope in his heart. After all, the few punches that smashed on the ground just now didn't seem to have the slightest effect on the mirror.

But trying, always have to do.

After Ellie also flashed to the edge of the cave, Su Wen smashed it down with a punch.

The momentum of this first punch is not as huge as just now, but Su Wen's punch is a melee skill that focuses on breaking with one click, so it is quite suitable to use it to break through the mirror.

"Click. ”

The effect was much better than Su Wen expected, and a crack appeared on the mirror.

Su Wen followed with a few punches, expanding the cracks, and finally, after a clang, under Su Wen's fist, a hole the size of a bowl appeared in this mirror.

The fragments of the mirror surface fell towards the cave, and the magic power that originally shimmered in it also flowed out of the mirror, and as soon as it came into contact with the outside world, it dissipated into basic magic power.

The passage between the cave and the outside world was opened, but nothing happened.

Whether it is air pressure or mana concentration, the cave is almost the same as the outside world.

At the moment when the mirror was broken, Ellie hurriedly came up, squeezed between Su Wen's line of sight and the hole, and looked into the hole.

"Don't panic. ”

Su Wen grabbed Ellie's collar and pulled her back.

"Ouch. ”

Ellie suddenly lost her balance and sat down next to Su Wen.

Judging from the fluctuation of magic power, this mirror does not seem to be connected with any alarm devices or defensive magic runes. In other words, it's just an ordinary piece of mirror that is used to close the hole.

The special feature of the mirror is only its sturdiness and its ability to insulate the breath.

Su Wen continued to expand the cave with his fists, and it didn't take long for him to smash an opening that could accommodate one person to pass through.

"Can you sense anything?"

Although Ellie was a little sulky because of the pull just now, she still came over again and replied, "Not for the time being, but the temperature inside seems to be higher than outside." ”

Su Wen looked at the hole through the hole again.

Instead of calling it a cave, it's better to call it a pothole. The scene inside the pit is the same as the one seen through the mirror, the walls of the cave are not straight up and down, and they are not neatly excavated by hand. Instead, there are protruding rocks or ravines all over the place, which looks quite natural.

So this cave is either naturally formed, or it has been artificially excavated a long time ago, and it has become like this with the passage of time.

"Let's go down and have a look?" Ellie seemed to be a little impatient, and asked Su Wen eagerly.

Su Wen didn't answer, as if he was still thinking about what the risks were.

However, Ellie saw that Su Wen was not particularly resistant, so she took off the cloak on her body, covered the exoskeleton armor tightly, and said to Su Wen: "Then I'll go and see it first, you should rest assured of my equipment, right?"

"Relieved. ”

Su Wen said a word, but he grabbed ahead of Ellie and got into the hole first.

Ellie looked at Su Wen's back, whispered yes, and then followed.