When the shimmering white rhombus appeared before the brother and sister, it startled them.

Wang Lan immediately adopted a defensive stance, sidestepped back with his right leg, and raised the Vajra Umbrella above his head with the tip pointing downwards.

Sun Muchen's fingers shone with a bright blue light, and a blue barrier appeared in front of the two of them.

Cold sweat streamed down their foreheads.

The rhombus charged toward the two of them with unstoppable force.

However, when the rhombus touched the blue barrier released by Sun Muchen, it suddenly dissipated.

The strange change was something the brother and sister never expected.

But the moment the rhombus disappeared, I could almost feel a gentle breeze brushing against my cheek.

The brother and sister looked at each other in bewilderment.

Sun Muchen thought for a moment and said, "This is probably just the volatilization phenomenon caused by ordinary pigments coming into contact with air. It's okay, let's go in."

As he spoke, Sun Muchen flicked his fingers, and the blue barrier took the lead, its radiance flowing towards the gate.

Wang Lan didn't understand what Sun Muchen meant by the evaporation phenomenon, but that didn't matter. Seeing that Sun Muchen had finished releasing his skill and nodded to him, Wang Lan maintained his defensive stance and walked ahead for safety's sake.

The brother and sister walked through the gate.

The view gradually shifted from pitch black to a predominantly blue color scheme, a result of Sun Muchen's skill. At first glance, the place appeared exceptionally spacious, but the tables and chairs were scattered haphazardly on the ground, showing signs of severe decay due to their age.

Wang Lan walked to a chair that was relatively close to her, looked down at it for a while, and then reached out to touch the chair, finding that it was covered with a thick layer of dust.

He turned to Sun Muchen and said, "Muchen, could you use your... uh, that skill to search the vicinity and see if you can find anything?"

Sun Muchen nodded readily and began to manipulate the blue light within the space.

Guided by Sun Muchen, the blue light emanated from him and transformed into streams that attached themselves to the walls, tables, and chairs.

Then, as if flowing water, it slowly moved, and visible ripples appeared in sight.

Watching Sun Muchen's actions, Wang Lan couldn't help but feel a surge of envy.

Although this skill only appears to have a single blue light, it has countless uses.

But at the same time, I'm also very curious.

What kind of energy is this?

How could it be so powerful?

At this moment, Sun Muchen's calm expression suddenly changed, as if he had sensed something, and he quickly looked around.

Seeing this, Wang Lan walked over to Sun Muchen and asked, "What's wrong?"

Sun Muchen was taken aback for a moment before replying, "This place is not simple; I seem to sense other energies."

Upon hearing this, Wang Lan's pupils contracted, and he gripped the Vajra Umbrella tightly, immediately becoming wary.

Although there was blue light for illumination, the brightness was far from sufficient. If something strange were to lurk in the shadows and suddenly attack, he would need to react immediately.

But Sun Muchen patted Wang Lan and said, "Brother, don't be too nervous. The energy I feel doesn't seem to be emitted by a living being."

"Not a living being?" Wang Lan asked curiously. "Then what is it?"

Sun Muchen frowned, feeling a strange, inexplicable sensation. Instead of directly answering Wang Lan's question, she manipulated the blue light in the space and brought it back into her hand. As Sun Muchen's palms came together, the blue light condensed into a ball of light.

Wang Lan stared at the blue orb of light in front of him, and for a moment, the reactor beneath the final fortress came to mind.

Apart from the color, they are exactly the same.

Sun Muchen rubbed his hands together, then suddenly opened them.

The surface of the blue orb immediately became turbulent, shooting out rapidly in all directions like a meteor.

Wang Lan couldn't understand why Sun Muchen would suddenly do this, but the appearance of this scene caused the entire space to flash with dazzling blue light, which gave him an unparalleled shock.

The next moment, a strange sound appeared in my ear.

"Waaah—"

The sound was very similar to the sound that Old Zhang made when he started the reactor at the final fortress.

As the sound grew louder, a pure white light also lit up behind them.

The brother and sister turned to look.

The white light was dazzling, and the moment it fell into their eyes, it suddenly became brighter.

Immediately, a series of crackling sounds filled the air, and dazzling sparks erupted from the surrounding walls.

This situation was unexpected for the two of them, so they immediately panicked. Wang Lan held the Vajra Umbrella horizontally in front of him, cautiously looking around, and asked, "Mu Chen, what did you do?"

Sun Muchen was just as flustered as Wang Lan. Hearing Wang Lan's question, he became even more confused and stammered, "I, I didn't, I didn't do anything!"

"boom!"

A loud bang.

A flame suddenly burst forth on a wall. It was unclear where the fire started, but the appearance of the flame certainly made the view much clearer.

But this only made the two of them more panicked.

Sun Muchen had withdrawn his skill and placed a barrier around both of them.

As their visibility decreased, just when darkness seemed to be swallowing their surroundings, suddenly a bright light appeared, dazzlingly bright. The two of them immediately felt a strong stinging sensation in their eyes and rubbed them. When they opened their eyes, they found that it was already bright outside.

Sun Muchen suddenly realized and said, "Could the energy I just felt be electricity?"

Having experienced the final fortress, they were no longer unfamiliar with electricity.

But how can there be electricity here?

Wang Lan frowned, suddenly remembering that little white light, and turned to look.

But what they saw was a cylindrical glass container, two meters in diameter, connected to the ceiling and the ground, located at the center of this space. Inside the container, a finger-sized point of light was vibrating violently.

Wang Lan moved closer and looked more closely.

Inside the container, there was an overwhelming density of light, so dense that it was impossible to see the exact number of rays. They collided and struck each other, creating a powerful sense of light.

At the bottom of the container, several pipes connect to the ground at the same level, extending in all directions to various locations.

Wang Lan looked down through the pipe.

I saw Sun Muchen standing in front of a wall, lost in thought.

"Brother, come here for a second!"

Upon hearing this, Wang Lan walked over.

Sun Muchen glanced at him, then pointed to the wall.

On the wall was a large, faded rhombus.

Wang Lan frowned and said, "Isn't this the diamond shape that appeared when the door was opened earlier?"

"Yes, that's it, it's definitely true, it's just..."

Sun Muchen thought for a moment before finally speaking.

"Don't you think this looks more like an arrowhead?"