Per 
SCP XXXX Draft
Item Number: # SCP-XXXX
Object Class: Euclid
Special Containment Procedures: SCP-5913 is to be kept in a 4 x 4 x 5-meter room, made of a mixture of steel and concrete with glass windows. There should be a 50-meter radius around the containment with another wall at precisely 50 meters away from the room in all directions. Security cameras are to be positioned facing towards the main room, as well as on the walls surrounding the compound. The footage should be monitored for irregular movement. In the case of failure of the security camera, the camera is to be replaced only, in SCP-5913’s periods of inactivity. Under the circumstances of all camera’s failing 4 D-Class personnel must be sent into the containment to investigate. Only D-Class personnel may cross the 50-meter radius. All unauthorized personnel who attempt to cross the radius will be dealt with accordingly
Description: SCP-5913 is a vaguely human unisex creature of unknown origin. When viewed by the human eye it will appear as an attractive member of the opposite gender. Though, its true appearance can be viewed through electronic cameras and photographs. SCP-5913 is highly intelligent and seems to understand several languages including but not limited to English, French, German, Latin, Ancient Egyptian, and Sentinelese. SCP-5913 has never attempted to start communication with personnel.
SCP-5913 has only been observed to have extremely high speed and reflexes though exact levels cannot be measured due to high risk of being in close proximity. When attacking it will lure in prey with a strange noise, survivors who have escaped its pocket dimension (SCP-5913-A) are unable to describe the noise and will appear physically distressed when questioned. SCP-5913 appears to prefer human prey items in the 18-25 years age bracket and will capture no more than 3 human prey items at one time. The reasons for this are still unknown. SCP-5913 is capable of disappearing into SCP-5913-A on demand but is unable to stay in there for more than 8 hours each 24 hours and cannot escape through SCP-5913-A.
Limited observation of SCP-5913-A (assumed to be a pocket dimension) shows that SCP-5913-A consists of rooms that can only be described as glass or mirror rooms. Connecting these rooms are a multitude of tunnels and mazes of low light or complete darkness. SCP-5913 can exit the pocket dimension at any point but prey items can only exit the dimension if let out by SCP-5913. It is unlikely that this is a point of origin for SCP-5913 due to its inability to stay inside the pocket dimension for long periods. Prey captured aren’t directly killed by SCP-5913 but are instead trapped in SCP-5913-A until 2 of the 3 human prey items have either died via the other prey item or one prey item has sacrificed itself. After this, the prey item/items are released by SCP-5913 though very few survive more than a day outside SCP-5913-A.
Addendum:
Notes on Behaviour:
SCP-5913 is not very aggressive in nature and will go through short periods of inactivity where it takes little movement in its containment and doesn’t visit SCP-5913-A. The cause of this is unknown but these short periods usually occur the week after human prey items have died. After this week has passed no personnel other than 3 D Class personnel can go within a 50-meter radius of SCP-5913’s containment. If within another week SCP-5913 hasn’t received any human prey items its influence will expand to another 100 meters, every week expanding by 50 meters until it's received its human prey items. This has only occurred once where over 27 personnel of all ages were lost, to access further information read [REDACTED].
SCP-5913-A seems to only be accessible by SCP-5913 and those it chooses to let in. Though it appears that recording, filming, and communication equipment still work inside of the space. Other than unreliability in some areas of the darker tunnels. This ability to record and film in the pocket dimension has highlighted SCP-5913’s nature further. SCP-5913 does not interact with 2 out of the 3 human prey items, other than observing from a distance but one out of the 3 human prey items will become its focus. This prey item will begin to experience hallucinations and eventually will begin to [DATA EXPUNGED].
Expeditions:
Authorized personnel may refer to documents 5913-I through to 5913-V for transcripts of expeditions
Document 5913-I: [DATA EXPUNGED]
Document 5913-II: [DATA EXPUNGED]
Document 5913-III: [DATA EXPUNGED]
Document 5913-IV: Exploration IV
Document 5913-V: [DATA EXPUNGED]
Exploration Log IV, undertaken on the ███/██/20██
D-6872 is a 21-year-old Caucasian female of short build and slightly attractive appearance with an unremarkable psychological background. Class-D designation due to disrespect to [DATA EXPUNGED] as well as causing [DATA EXPUNGED]. D-6872 is equipped with a camera attached around their head fitted with a live connection, and an audio headset for communication with Dr. ██████ at control. They are also equipped with placeable wall cameras and batteries.
D-6872 approaches SCP-5913 slowly while glancing over at D-9867 and D-7521. Despite the proximity, SCP-5913 seems unaware of their presence.
D-6872: I think he’s asleep? Do we proceed?
Dr. ██████: Yes proceed. Can you hear any strange noises?
D-6872: No, I can’t hear any noises yet.
Dr. ██████: Thank you, proceed.
D-6872 continues at a slow pace for 10 meters until Subject halts at 20 meters away.
Dr. ██████: Please proceed D-6872.
D-6872: (indistinct mumbling) ….so….beautiful
Dr. ██████: Proceed D-6872.
Livestream is disrupted for a few minutes
Dr. ██████: D-6872 are you there?
D-6872: I…
Dr. ██████: Please describe your surroundings.
Subject seems to get agitated
D-6872: With all due respect Doctor I have just woken up in a strange place after suddenly blacking out while walking up to a SCP I-
Dr. ██████: Please describe your surroundings.
D-6872: I- Ok, I’m in a room, the floors are covered in mirrors- oh god so are the walls I can see myself everywhere.
Dr. ██████: Are you with D-9867 and D-7521.
D-6872: No I’m alone, there are also tunnels leading out of this… box. Should I proceed?
Dr. ██████: Yes, try to locate the other personnel. Could you give us a clearer view of the tunnels?
Subject’s camera is lowered showing a long low lit tunnel. Estimated length is 15 meters.
D-6872: Are you sure going in there is necessary?
Dr. ██████: Yes, before you proceed, place a camera.
Subject fixes a small camera to the wall.
Dr. ██████: The camera has connected to my system. Proceed.
D-6872: Okay….
[REDACTED]
Subject remains active moving through the tunnels for the next week. Connect remains. Subject has not come across D-9867 and D-7521, location still unknown. No contact has occurred with SCP-5913 but Subject discusses a feeling of being watched. The cause of the feeling is unclear. Possible cause is long exposure to SCP-5913-A or other unknown means.
D-6872: I’m never getting out, right doctor?
Dr. ██████: (no response)
D-6872: I haven’t eaten since I got here, I can’t find any of the others I.. how many times have you done this to-
Dr. ██████: Please remain professional D-6872.
D-6872: Are you insane! I… I’ve been here for a week I.. I can barely move… I’m going to die.
Dr. ██████: Please proceed.
D-6872: [REDACTED]
Half a week passes.
D-6872: ….Doctor are you there?
Dr. ██████: Yes.
D-6872: Are you hearing this?
Dr. ██████: Please describe the sound.
D-6872: It's… a male voice… he’s telling me that….
Dr. ██████: Telling you what? Please elaborate.
D-6872: He… he said I have to kill the others to be free, I- doctor I can be free! But-
Dr. ██████: D-6872 refrain from killing the other personnel, we want to see what will happen if no one dies.
D-6872: (incoherent muttering)
Subject’s camera shows frantic movements but Subject is unresponsive.
Subject comes across a body on the ground identified as D-7521.
D-6872: (incoherent muttering)
Subject checks the body for a pulse then picks up D-7521 and proceeds to [RECACTED].
Dr. ██████: D-6872 are you there.
Frantic movements begin again on the live stream and harsh breathing can be heard through the microphone. Until Subject comes across D-9867. D-9867 can be heard through the microphone appearing distressed.
D-9867: Hello?
D-6872: (Incoherent muttering)
D-9867: Lucy? Is that you? Are you ok?
Live stream shows D-9867 approaching Subject. Before Subject suddenly lunges forward 50 cms. Subject proceeds to [EXPUNGED]. Audio and Recording has been redacted due to respect to D-9867 and D-6872’s loss.
Dr. ██████: D-6872 are you there? Are you aware of what you have just done?
Subject’s live feed switches to darkness where only harsh breathing can be heard throughout the audio.
D-6872: No… no no no no I did what you said you promised… I’d be free! I did everything you asked, I was a good girl. Please-
Dr. ██████: D-6872 Please describe what you are seeing!
D-6872: No… please No (Subject continues to beg)
Subjects live feed cuts out after a minute or 2 of progressively louder begs.
Note: Subject was recovered █ hours after live feed cut out. Medical reports indicate Subject was physically untouched other than being physically weakened and malnourished. No other personnel were recovered. Subject has since been administered A-Class anesthetics and has been moved to a new site.
