High-level martial arts: Contract cashback, invincible starting from the Zerg.

In this silent environment, the sound of Liu Siyu's steel combat boots crushing glass echoed.

At this moment, on the stairs of the apartment building that was blocked by the military and police, Liu Siyu was walking ahead of Chen Feng.

Her Sirius mechanical gauntlets occasionally emitted tiny blue fluorescent lights, and the raised metal spikes on the surface of the gauntlets seemed to be rhythmically charged with each step, with an arc of electricity flashing above them every three or four steps.

Compared to the Sirius mechanical gauntlets, Liu Siyu's graceful and explosive figure seemed rather ordinary at this moment.

After all, the name Sirius Group holds a prominent position in the Great Xia Kingdom.

The weapons they produce are not merely a guarantee of high-quality weaponry, but a strategic means that transcends weaponry.

When the two arrived at the emergency escape doors on their target floor, one after the other.

Liu Siyu stopped in front of the escape exit.

He turned to look at Chen Feng, his eyes seeming to hold a hint of confusion.

"I heard you once single-handedly killed a Xuan-rank demon?"

"Back then, I was a level seven Demon Slayer," Chen Feng said.

Liu Siyu smiled slightly, then slowly grasped the doorknob that could be crushed in an instant, and said softly, "Very impressive, I hope you can keep up the good work~"

Liu Siyu's tone seemed to carry a hint of provocation, but Chen Feng didn't have time to discern her true meaning...

Chen Feng, who had fought demons countless times, knew very well that when demons sensed fear or pride floating in the air, these human emotions would be like electrified honey, detected and absorbed by the demons.

Once the victim's fear energy reaches the threshold that the demons can absorb, most demons can see the victim's deepest nightmare fragments and exhibit some of the nightmare's characteristics.

Therefore, when facing a demon, maintaining emotional stability and a calm mindset may be the key to victory!

"I certainly won't let my emotions control my fighting ability," Chen Feng said coldly.

Liu Siyu smiled slightly, twisted her right hand, and opened the door to the escape route.

The light bulbs twitched on the ceiling, casting alternating shadows and flashes of white light across the corridor.

Whenever the overhead light flickers, a dark shadow seems to seep out from the wall, and an oily black liquid crawls out like earthworms along the baseboard. But when the white light bursts out, the liquid quickly shrinks back into the wall, as if it were a living thing burned by the light.

Liu Siyu glanced at the surroundings, then turned to Chen Feng and said, "We can begin."

Chen Feng immediately placed the sonic briefcase he was holding on the ground.

After entering the electronic password, they immediately prepared to use the suitcase's electromagnetic induction to search for abnormal magnetic fields—this was a high-tech electronic instrument used by the Great Xia Kingdom to find and deal with demons, with a detection range of up to hundreds of meters and extremely high accuracy.

Brownish-yellow water stains dripped from the ceiling of the corridor, outlining grotesque patterns resembling tree roots on the vertical walls, looking like clumps of branches with dark red crystals at their ends.

The lights above the corridor are still flickering...

That lifeless rhythm is like the contraction and expansion of a dying person's pupils under the light.

Boom! !

The lights above went out again, then came back on after three or four seconds, as if they were being controlled by a mysterious force.

"No obvious abnormal biomagnetic field detected, threat level 1."

The testing instrument emitted a mechanical female voice, and the real-time waveform displayed also showed certain patterns.

Normal human biomagnetic fields appear as stable sine waves on the screen. However, if there are demons nearby, the recorded magnetic field will show more interference, similar to the pulse waves of some deep-sea sonar.

The testing instruments will perform more detailed verification of this pulse wave.

The two most important projects are basic biomagnetic field matching and chaotic analysis of skin conductance.

After recording all the parameters for this floor, Chen Feng put the testing instrument case aside.

"We can begin questioning now," Chen Feng said, standing up.

......

The two immediately arrived at the door of apartment number 407 and rang the doorbell.

"Eight rooms on each floor, and we've only made it to the fourth floor," Liu Siyu complained to Chen Feng, pursing her lips as the Sirius mechanical gauntlets on her hands emitted a cloud of rapidly spinning steam.

After a while, faint footsteps began to come from inside the room.

Bangchi——! !

After the door opened, a middle-aged man, shirtless, appeared in front of the two.

He was holding a bottle of beer, reeking of alcohol, and his eyes were glazed over as he looked at the two of them, clearly unaware of his situation.

"Uncle, have you spotted any suspicious creatures or heard any suspicious noises over here?" Liu Siyu asked.

"What... creature? What... noise? No, no, can you staff please shut up and stop interrogating us?" The middle-aged man was clearly getting impatient.

In his eyes, Liu Siyu and Chen Feng seemed to be nothing more than investigators sent by the neighborhood committee, simply conducting routine questioning of ordinary criminals.

The middle-aged man then closed the door.

Liu Siyu smiled and shrugged at Chen Feng, saying helplessly, "It's a good thing, at least he's not a demon."

The two asked about all six rooms on the right side of the fourth floor of the apartment.

Most of the residents were clearly mentally sound and did not exhibit any obvious demonic characteristics. However, it took the two of them quite a bit of effort to explain to them why the area was sealed off by the military and police.

The door to room 403 slammed shut.

Liu Siyu and Chen Feng immediately looked at rooms 402 and 401, which were not far away.

Ring! Ring! Ring!

Ring! Ring! Ring!

As Liu Siyu pressed the doorbell for apartment 402, she frowned, as if sensing something that puzzled her.

It was as if she had remembered something, but she was too surprised by what she saw to recover for a long time.

She looked at Chen Feng with a dazed expression.

Chen Feng immediately examined the door in front of him carefully.

"Sister Siyu, what's wrong?"

"No, I think I just had a strange hallucination, but I'm not sure," Si Yu said, turning to Chen Feng.

phantom?

Among the demon race, besides the greedy demons who can directly transform into humans, the threat posed by the phantom demons is not to be underestimated.

Although phantoms usually act alone.

However, during the summoning of demons, they also cooperate with other demons to probe the mental power of their prey and attempt to control their consciousness, thereby greatly increasing the demons' success rate in hunting.

Just then...

The door to room 402 was finally opened.

An elderly woman in a long dress opened the door, carrying a teacup; she was dressed very elegantly.

She looked like an elderly lady who had just finished afternoon tea.

However, the moment they saw her eyes clearly, they both gasped in shock...

At this moment, her pupils appeared an eerie crimson under the pale light.

—And that is the sign of being controlled by the devil.