At 1:45 p.m., the "headache" recorded in the note arrived on time with a strange muffled noise.

When it sounded like the noise of a subwoofer and began to shake the eardrums, Zhang Luo, who didn't care about the time, suddenly burst out with a terrifying pain in his head!

"Ahh

The four people who were still investigating in the sandworm's nest fell to the ground almost simultaneously due to severe pain.

The strange thing is that Frankenstein, who should have no pain nerves, actually collapsed on the ground limply.

"It's ...... What the...... Situation......"

Even though he transforms into a demon form with super recovery ability, a trace of blood still flows from the corner of the half-demon's mouth.

Hassin, who was not far from the half-demon man, fainted directly at the mouth, bent into a shrimp-shaped body, and was still convulsing.

"Damn."

Frankenstein, who has always been calm, although he can still maintain a clear consciousness, is also very rare to scold.

Under the terrifying crazy headache, Zhang Luo became the least affected of the four.

After experiencing the ferocious experience in a dream and the severe pain when injecting demon blood, Zhang Luo's "endurance" has obviously improved a lot.

Even though his head felt like it was about to explode, he was still awake at this time, covering his ears for the first time to block out the muffled noise that tried to continue into his ears.

After two minutes, the noise finally died down. But for Zhang Luo, it seemed like an hour had passed.

"Hoo ......"

Standing up and patting off the green slime on his clothes, he walked over to Frankenstein, who was still lying on the ground, looked down at the petite girl condescendingly, and asked, "Can you stand up?" ”

"Yes."

Frankenstein sat up slowly, his face much paler than before.

Despite this, Zhang Luo had no intention of helping her stand up. After all, this "girl's" body weighs a ton, and it would be strange if she could be lifted up by herself.

"What was that?" Zhang Luo looked around with palpitations.

"Strong low-frequency noise and infrasound waves, which affect my brain." Frankenstein said as he put his hands on the ground and slowly stood up.

"I see......" Zhang Luo nodded knowingly.

Generally speaking, noise with a frequency between 20 and 200 hertz is called low-frequency noise. If you are affected by strong low-frequency noise for a long time, it will indeed cause symptoms such as dizziness, nausea, and tinnitus.

And the sound with a frequency of less than 20 hertz that cannot be heard by the human ear is an even more terrifying infrasound.

Infrasound waves are less likely to attenuate than ordinary sound waves, and their propagation power is very strong, and they may cause resonance of human internal organs at a specific frequency, causing irreversible serious injuries to the human body!

Because of this, some countries are also developing infrasonic weapons, trying to apply this invisible terrorist "killer" to the battlefield of the future.

At this time, Zhang Luo also had a rough guess about what happened just now:

"Isn't this noise for bug control?"

In order to keep a ferocious creature like the Mongolian sandworm in captivity, it is not enough to feed it with human corpses, but also need certain inhibition measures to keep these ferocious giant insects here.

The noise just now is likely to be the guy hiding behind the scenes, using a means to control the Mongolian sandworms.

If this is the case, then it is clear what this inverted pyramid is used for:

"This place...... Could it be some madman's 'farm'? ”

- Use the eerie black mist to control the gods, and the Mongolian sandworms with low-frequency noise and infrasound. The "man" in charge of this pyramid is likely to have captured some gods and strange creatures here, and then used different means to "seal" them!

Thinking of this, Zhang Luo couldn't help but be silent.

The existence of "captive gods and demons" will undoubtedly become the strongest enemy he has encountered so far.

Neither Dracula nor the "Creator" of Paradise can be a match for this crazy guy!

Facing an invincible and powerful opponent, Zhang Luo made a decision in two seconds:

"Shall we retreat?"

"Hasin is unconscious, mission over." Frankenstein said and bent down, picked up the Egyptian royal sister who had fainted to the ground, and carried it easily on her shoulder.

"I also think it's better to leave this ghost place as soon as possible, and I don't know what hell I will encounter if I move on......" The half-demon who was half dead by the sound wave just now also immediately agreed with Zhang Luo's proposal.

Seeing that the half-demon was fine, Zhang Luo immediately continued the topic just now: "What's going on with the Monster Management Bureau?" Do you know what? ”

Know yourself and know your opponent, and you will not be defeated in a hundred battles. In the case that the enemy may come from the "Monster Administration", it is also necessary to know about this secret organization.

"You should know about the Killing Force, right?" The half-demon asked.

"Well, I've met the Kill Force guys, is this a world organization?" Zhang Luo asked.

He had thought that the "killing force against heretical creatures" was only available in China, but the half-demon in front of him was obviously not Chinese, if he also knew about this organization, presumably the killing force was not just a subordinate organization of the state.

As expected, the half-demon immediately nodded, and his face, which was still covered with the armor of the scarlet demon, showed a sarcastic smile: "Many countries have killing units against heretic creatures, they share the same name, and their combat effectiveness is the same. It was actually a group of lunatics who were pulled out of a mental hospital, trained in how to use weapons, and then sent out as cannon fodder. Anyway, they die wherever they go, and it's completely impossible to beat heretics. ”

Speaking of this, the half-demon finally became a little more serious and continued, "But the Monster Administration is not quite the same. This organization, which was jointly established by the five permanent members of the United Nations, also has branches in various major countries, and in those small countries with many heretical creatures, it also has an executive body, just like a secret 'United Nations'! ”

Hearing this, Zhang Luo had almost guessed what was going on with the Monster Administration: "So the people in the Monster Administration are very powerful, right?" ”

"Of course, more than 90 percent of the world's great exorcists belong to the Monster Authority, and that institution is even called 'humanity's last hope against heretical creatures'. Whenever heretic creatures cause some trouble, the Monster Management Bureau will first send its subordinate killing team to investigate, and after confirming the situation, send a direct elite to directly kill the target! The half-demon's voice trembled, as if he recalled "fond memories" of contact with the elite of the Monster Authority.

"I see." Zhang Luo nodded in understanding.

In this way, there should be many super warriors at the level of great exorcists in the Monster Administration. If they had done it themselves, it would have been possible to do so.

Since the opponent's strength is so terrifying, all that is left now is to get out of this place as soon as possible without avoiding confrontation.

But to get out of the pyramid is obviously not as simple as when you come in......

Before he could return to the entrance, the ground under his feet shook violently, and with a loud "boom" sound, the entire hall rotated twice, and the original entrance and exit disappeared.

"......," the girl in black frowned as she stared at the disappearing pathway.

She walked up to Zhang Luo, handed the bronzed royal sister on her shoulder to Zhang Luo, and then rolled up the sleeve of her right arm, revealing her seemingly thin little arm, and said without looking back: "Stand back." ”

Zhang Luo and the half-demon immediately took a few steps back.

Under the gaze of the two, Frankenstein's right arm burst out with a white arc of electricity, strode towards the stone wall directly in front of him, and slammed into the wall with all his might.

"Bang!"

The second "earthquake" in the sandworm's nest occurred.