Noting that 
Dangerdudegames (account age 1 day) recently applied for site membership. They have the following sandbox, which has common indicators of AI-generation: https://scp-sandbox-3.wikidot.com/scp-xxxx:the-shrieker page title "SCP-XXXX: The Shrieker"
Of note, the page creation comment is:
Hey, I’m kinda new to this. The original idea, sketch, abilities, attributes, everything was made by me. AI re-wrote it so it sounds like an SCP document. Let me know what you think!
Revision 0 retained; no edits on the page.
Item #: SCP-XXXX
Object Class: Euclid
Secondary Risk Classification: Keter-level Event Potential (Auditory Cascade)
Special Containment Procedures:
SCP-XXXX is contained at Site-██, within a subterranean anechoic containment chamber constructed of layered sound-dampening composites, vibration-isolated suspension mounts, and non-reflective shock-absorbent flooring. The chamber is maintained at a constant humidity of 62% and supplied with recycled water through a drip-fed, gravity-only system to avoid mechanical noise.
No electronic devices, powered machinery, or living personnel are permitted within a 100-meter radius of SCP-XXXX’s containment chamber during standard operations.
Observation is conducted exclusively through optical periscopes and passive, non-electronic pressure-based indicators. All monitoring systems must remain external and disconnected during feeding, hydration, or cleaning cycles.
Personnel assigned to SCP-XXXX must undergo Level 4 Auditory Suppression Training and are required to wear triple-layer acoustic dampening suits when entering adjacent maintenance corridors. Vocalization of any kind is grounds for immediate termination of access and reassignment.
In the event of unintended sound exposure, Protocol QUIETUS-██ is to be enacted immediately.
Description
SCP-XXXX is a bipedal, non-human entity standing approximately 2.1–2.4 meters in height, with a lean but powerful frame supported by digitigrade lower limbs. The entity’s body is covered in overlapping brown keratinous scales, exhibiting irregular growth patterns and jagged protrusions along the cranial snout. These protrusions appear vestigial but hardened, suggesting a protective or resonance-diffusing function.
SCP-XXXX lacks visible eyes, external ears, or any identifiable sensory organs beyond its oral cavity. Despite this, it demonstrates extreme hypersensitivity to sound, including frequencies and amplitudes undetectable to human hearing.
The entity’s most prominent anatomical feature is its jaw structure. SCP-XXXX possesses an extraordinarily wide gape, capable of opening to angles exceeding ███ degrees without apparent strain or injury. The interior of the mouth is lined with dense muscular tissue and vascularized membranes. No teeth are present.
At the corners of the mouth are thickened red connective tissues analogous to reptilian oral commissures observed in crocodilians and certain theropod dinosaurs. These structures appear to stabilize the jaw during extreme opening and sustained vocalization.
Behavior
SCP-XXXX remains entirely docile in the absence of auditory stimuli. While in a silent environment, it will stand, sit, or slowly pace without signs of distress, aggression, or awareness of external threats. It does not react to physical injury, invasive procedures, or environmental changes so long as absolute silence is maintained.
SCP-XXXX does not experience pain in any observable manner.
However, exposure to any sound, including vibrations below human perception, immediately triggers a hostile response. Upon detecting sound, SCP-XXXX enters a violent rampage state, seeking to eliminate all sources of auditory disturbance. This response persists until no sound remains detectable.
After neutralizing all perceived sources, SCP-XXXX will consume organic remains indiscriminately.
Vocalization: “The Shriek”
SCP-XXXX is capable of producing a vocalization referred to by Foundation personnel as “the Shriek.” The Shriek can be modulated into at least three distinct intensity stages:
Stage I: Audible to humans. Causes disorientation, vertigo, and pain.
Stage II: Physically concussive. Capable of knocking personnel off their feet and causing internal hemorrhaging.
Stage III: Largely inaudible due to extreme amplitude. Induces progressive neurological damage, cerebral bleeding, and eventual brain death over ███ seconds of exposure.
SCP-XXXX appears to require significantly increased hydration following prolonged Shriek events.
Sustenance
SCP-XXXX can survive several months without food, but only several weeks without water. Water intake is critical following vocalization, suggesting the Shriek causes internal strain or dehydration.
Discovery Log
SCP-XXXX was recovered from a ███████ forest region following reports of sudden mass fatalities with no visible external trauma. Autopsies revealed extensive cerebral damage, ruptured auditory canals, and hemorrhaging inconsistent with known weaponry.
Foundation agents located SCP-XXXX standing motionless at the center of the affected area.
“It didn’t move. It didn’t react. It was like a statue. Then someone tripped.”
— Recovery Team Lead ████████
██ personnel were lost during containment. SCP-XXXX was subdued only after the deployment of experimental sound-nullification equipment, later deemed unsafe for general use.
Experiment Log XXXX-A
Test: Controlled auditory exposure
Result: SCP-XXXX immediately entered aggressive state, destroyed sound source, and escalated Shriek intensity despite lack of threat.
Conclusion: SCP-XXXX does not differentiate between harmful and non-harmful sound. Silence is the only viable containment method.
Incident Report XXXX-██
During routine hydration, a valve malfunction produced a ███ dB noise.
SCP-XXXX breached containment, resulting in ██ fatalities before re-entering a docile state once silence was restored.
Following this incident, all mechanical systems were removed from the chamber.
Addendum: Cross-SCP Interaction Proposal (DENIED)
Proposed interaction with SCP-████ was rejected due to risk of uncontrolled auditory escalation.
“Introducing sound into a creature that exists to erase it is not research. It’s suicide.”
— Dr. ███████
Final Notes
SCP-XXXX demonstrates that evolution does not require awareness of future intelligence. The entity is perfectly adapted to a world without silence-breaking technology.
Humanity was simply not accounted for.
Excerpts of note:
Item #: SCP-XXXX
Object Class: Euclid
Secondary Risk Classification: Keter-level Event Potential (Auditory Cascade)
Special Containment Procedures:
SCP-XXXX is contained at Site-██, within a subterranean anechoic containment chamber constructed of layered sound-dampening composites, vibration-isolated suspension mounts, and non-reflective shock-absorbent flooring. The chamber is maintained at a constant humidity of 62% and supplied with recycled water through a drip-fed, gravity-only system to avoid mechanical noise.
No electronic devices, powered machinery, or living personnel are permitted within a 100-meter radius of SCP-XXXX’s containment chamber during standard operations.
Addendum: Cross-SCP Interaction Proposal (DENIED)
Proposed interaction with SCP-████ was rejected due to risk of uncontrolled auditory escalation.
“Introducing sound into a creature that exists to erase it is not research. It’s suicide.”
— Dr. ███████
Final Notes
SCP-XXXX demonstrates that evolution does not require awareness of future intelligence. The entity is perfectly adapted to a world without silence-breaking technology.
Humanity was simply not accounted for.
Permanently banned, PM sent. Zoobeeny, Queerious, nico supporting.
