The air is constantly fluctuating, which is the effect of sound waves.

If it had been in the past, these sound waves would have brought the message back a long time ago, but this time it seems to be different from everything that happened before.

"How?" Lubrom asked cautiously as he looked at Elise's frowning brow.

"Shh Elise put her finger to her lips and motioned for Lubloom not to speak.

So Lublum fell silent, waiting for Elise to finish.

But as time passed, Elise's brow still hadn't been unlocked.

"Why?" Elise said worriedly, "These sound waves don't seem to be able to penetrate the perimeter of the house, they bounce off the house as soon as they touch it. ”

"So, meaning yours is also invalid?" Lublum understood the meaning of this sentence and asked directly.

"Yes." Frustrated, Elise couldn't do anything but nod.

If only he could have the same detection technology as Xie Yan, Elise couldn't help but think in her heart as she looked at the house.

Indeed, after all, Xie Yan's detection does not rely on sound, but on the diffusion of data.

Therefore, as long as he has a channel small enough for the data to pass through, Xie Yan can conduct exploration.

However, Xie Yan was not there.

That's why Elise was full of sadness at the moment.

She didn't know if she should rush into it without knowing anything about the enemy, because her decision affected not only herself, but also Lublum, who was beside her.

"If the decision is not good, then let me investigate first." "I'm specialized in this profession, so I feel like I'm a good fit for it." ”

But Elise did not answer, and continued to fall into deep thought.

What kind of decisions should be made?

What if the two of them die here?

No, what if you were to die outside after being freed from the edge of Long Night's side?

Elise didn't dare to think about it.

But not daring to think doesn't mean she's afraid of the scene in front of her.

So she stood up.

"You go to the roof and see if there's an entrance for you to sneak into." Elise looked at the mana supply center in front of her and said slowly.

The front of the building does not have any windows or viewing points, and the inhabitants of the settlement do not have any farsightedness, so Elise can stand boldly in front of the house.

"Okay." Immediately after receiving Elise's order, Lublum also stood up and walked towards the house. It's just that unlike Elise, he's stealthy and mobile.

Probably this is called professional habits.

'Kiln ......'

Elise stood in the doorway of the Mana Supply Center, watching Lublum sneak up towards the building.

Despite stealth, Lublum was much faster than Elise had expected, and within a few seconds, he was able to climb the low building as light as a swallow.

Also, after all, the height is about the height of two or three people, and it is indeed easy to climb.

"Is there one?" Elise whispered into the communicator next to her shoulder.

"Yes, indeed." Lublum also replied via communicator.

"That's good." Elise nodded, "You just sneak in through the entrance above, look for the mana supply part of this building that controls the entire settlement, and remember to tell me if you find it." ”

"What about you?" A worried voice could be heard from Lubrum.

"Me?" Elise's gaze stared at the door in front of her, "I'll walk straight in." ”

……

Perhaps even Elise didn't expect that the door to this important mana supply center was unlocked.

With a gentle push against the door, the seemingly snug door opened.

"That's really ......," Elise didn't know what to say, so she spread her hands and chuckled twice.

Then, with a slight movement, her figure flashed into the mysterious building.

……

"Ahem......"

In this building, not only is it dark, but there seems to be a lot of dust that has been silent for a long time.

The darkness was pure, unlike the excessive glow of the settlement, and when the door behind Elise closed, she felt like she had fallen into the black prison of eternal calamity, and she couldn't see her fingers.

"It's too dark in this place, too." Elise muttered quietly as she fumbled for the door behind her.

She knew that the first thing she needed at this moment was a light source.

As long as there is a light source, it can dispel the darkness, and at the same time increase the confidence in her heart.

Elise then felt the Soul Cube and reconstituted it into a burning rod in the palm of her hand.

'Shhh

The sound of the incendiary rod lighting rang out in the silent space, and at the same time it appeared, a bright red light.

The entire space lit up under the reflection of the burning stick.

But only in this small room near Elise.

Looking at the surrounding walls and a table facing the door—and the steel gate behind it—Elise realized that the place she was standing in was something that resembled an entryway.

Inside the door behind the table in the hallway is the true face of this magic supply center.

But why?

Why is there such an abandoned portal in this mana supply hub?

Elise couldn't help but fall into thought.

But it's not hard to think about this question.

Because if the entrance of a house has never been used, it means that the house has not been visited for a long time, and its owner has not been out of the house for a long time.

So, in that case, the amount of dust on the floor and in the room should make it possible to guess how long the hallway was abandoned.

So, with this thought, Elise could not help but observe the proof of the desolation of the room by the light of the incendiary rod.

"The dust on the ground is like snow." Elise moved her feet, and after kicking up a large cloud of dust, she couldn't help but cover her mouth and nose in thought.

It seems that this magic supply center has not been visited by anyone for a long time, and no one has come out.

"It's a shame that these abyssal demons have been able to stay in this place for so long." Elise shook her head, and walked into the steel door behind the table with the incendiary rod in hand.

The iron door looks very strong, but it is not known how hard it actually is. Elise took a closer look at the door in front of her with the incendiary stick in her hand, and focused her gaze on the communicator on her shoulder.

She wanted to ask Lublum what it was like.