Object Class: Safe
Special Containment Procedures: SCP-XXXX is to be attached to a standard mannequin head bust. SCP-XXXX is to be secured on the head at all times when not in use. Outside of testing, the 40MM NATO filter, SCP-XXXX-1, is to be detached from SCP-XXXX and stored separately. As the mask is safe, the mask and filter may be placed simply in any containment cell or storage facility.
Description: SCP-XXXX is a civilian-issue Israeli M-51 gas mask, acquired by the Foundation from a part of the underground complex located at the former Chernobyl nuclear power plant site on ██/██/19██. Mask size is #3. Attempts to mount SCP-XXXX with nominally compatible filters have been met with failure; however SCP-XXXX-1 is compatible with any gas mask mounting a 40mm NATO filter, and shows no anomalous properties unless attached to SCP-XXXX.
If SCP-XXXX is worn over the subjects face, it will begin to display its anomalous properties, subject is designated SCP-XXXX-2. SCP-XXXX-2 will refuse to remove the mask if ordered. After ~1h exposure, SCP-XXXX-2 report hearing a number of conversations, each stretching for ~15 minutes. SCP-XXXX-2 is able to describe and reproduce the content of the conversations, but is unable to recall their content outside of its duration. After ██ hours, the tone of the reported conversations shifts towards more aggressive. SCP-XXXX-2 at this stage are able to recall some of the phrases used, the most frequently reported being [DATA EXPUNGED]. After further ██ hours, SCP-XXXX-2 will become restless and irritable, showing an increased rate of involuntary movement, especially affecting head and eyes; subsequently, SCP-XXXX-2 will stand upright in attention, and report themselves as "Lieutenant █████ of the ████ Division" [See Addendum XXXX-1 for details]. After ██ further hours, SCP-XXXX-2 will seat themselves, and engage in self-talk, loosely describing a riot breaking out in [DATA EXPUNGED] [See Addendum XXXX-2]. After further ██ hours, SCP-XXXX-2 enters as state of panic, and becomes unresponsive [See Addendum XXXX-3] .
If the mask is forcibly removed at any point, SCP-XXXX-2 will immediately begin showing symptoms of an intense allergic reaction, progressing into laryngeal edema.
Discovery Log: ██/██/20██
Reconnaissance Squad ████ sent to investigate paranormal hearings within radiated zone 3-██. Agent Zykov discovered abandon bunker near the edge of 3-██, now referred to as Bunker-1. Bunker-1 contained several items including [DATA EXPUNGED], Five (5) Number 2 unsharpened pencils, four (4) chains neatly stacked in the corner, and two (2) desks made of Oak and tempered steel. The body of ████ was located in the center of the room. Upon autopsy, death was likely caused by a combination of heavy radiation poisoning and major lacerations of the chest cavity. SCP-XXXX was located upon a table near the left corner of the room. [DATA EXPUNGED] resulting in Agent Zykov to require sedation and emergency evacuation. Reconnaissance mission aborted. [Addendum 4 for log] Agent Zykov taken into psychological evaluation, released soon after with none of the physical effects nor mental effects.
Dr. ████: Please reiterate your name into the microphone again. Please say it louder this time.
SCP-XXXX-2: My name is Lieutenant █████ of the ████ Division.
Dr. ████: Lieutenant, what is your mission?
SCP-XXXX-2: Sir, I am to oppose the riot occurring in █████, sir.
Dr. ████: The Riot has ended ██ years ago.
SCP-XXXX-2: Negative sir, the riot is still continuing. You just don’t know it, sir.
SCP-XXXX-2 denied any more questioning.
SCP-XXXX-2 laughs, sitting down on the chair.
SCP-XXXX-2: You know, before this all happened I used to be a somebody. Then of course he was elected. Apparently the people of █████ didn’t like that. Then one small
group [DATA EXPUNGED]. My wife was found in the pile of bodies being [DATA EXPUNGED]. Best way to deal with the [DATA EXPUNGED].
Dr. ████: Please state your name into the microphone, loud and clear.
SCP-XXXX-2 again remains silent.
SCP-XXXX-2 bolts out of the chair, knocking it over in the process. SCP-XXXX-2 immediately darts towards the door, pounding on the door until hands were heavily bruised.
Dr. ████: SCP-XXXX-2 Step away from the door or you will be executed.
SCP-XXXX-2: No, no you don't understand! She needs me, I can hear her screaming for me!
Dr. ████: SCP-XXXX-2, this is your final warning. Step back from the door or face termination.
SCP-XXXX-2: No, no way you fucking swine, open this door, now! Hurry before she becomes one of them!
Test was abruptly ended, SCP-XXXX-2 being terminated and SCP-XXXX placed back in storage.
Agent Zykov: This is Reconnaissance Squad █████ to Site ██, we have located a bunker near the reported site, permission to breach. Over.
Site ██: Confirmed, breaching permission accepted. Proceed with caution Squad █████
Agent Zykov: Alright, ████ and ████, you’re point. ████ watch my six.
Agent Zykov proceeds to breach the door, followed by the squad.
Agent Zykov: Nothing… Wait, a M-51. Heh, favorite brand.
Agent Zykov removes his mask, replacing it with SCP-XXXX
████: Sir, I don’t think this is under regulation.
Agent Zykov movements become spastic, the sound of hyperventilation are evident as equipment rattles.
Agent Zykov: Sh! Do you hear that? Group of people, talking..
████: Sir I hear nothing.
█████: Sir there is no voices. Sir, remove the mask now.
Agent Zykov turns to the squad, weapon drawn.
Agent Zykov: No, stand down. You will not touch this mask!
█████: ████ quick, get the sedation. Agent Zykov put the gun down, now.
█████: Shit, Site ██ we need immediate EVAC, we have one sedated with a possible SCP—
The rest of the audio log is distorted; possible cause was damage due to struggle with Agent Zykov.