Per 
Item #: SCP-5267
Object Class: Euclid/Potential Keter
Sketch of SCP-5267 by Agent Kenneth █████ (See Incident 5268-1-A)
Special Containment Procedures: As of now, SCP-5267 is not currently contained in any Foundation facility, but has been successfully sealed off in Foundation subway tunnels connecting Site-19, Armed Research and Containment Site 48, Site-12, and Site-██. Subway tunnels are to be routinely inspected every 12 (twelve) hours by a special team consisting of members of MTF Lambda-12 (“Pest Control”) equipped with Class 4 Hazmat gear in order to track down any “nesting ground” created by SCP-5267, or SCP-5267-1. If SCP-5267, or any specimen originating from it is seen outside of the aforementioned tunnels, MTF Beta-7 (“Maz Hatters”) are to be called in to reinforce MTF Lambda-12.
If SCP-5267 or any SCP-5267-1 hunting party is found attempting to enter Site-19, Armed Research and Containment Site 48, Site-12, or Site-██ via service elevator, maintenance tunnels, or other means, the facility is to enter full-site lockdown until all of the invasive specimen are either safely contained or terminated. The bodies of recently terminated SCP-5267-1 are to be handled with only Class 4 Hazmat equipment or higher, and any and all staff that were present in the facility during a suspected breach are to be examined for any signs of infection or transformation into SCP-5267-1.
If SCP-5267 is found, it is to be tranquilized and contained kept in a 10 m x 20 m room with small pools of water and a sandy substrate. Rocks and driftwood are to be left in a random arrangement for SCP-5267 to nest in. SCP-5267 is allowed 2 (two) live Class-Ds for conversion into SCP-5267-1 each week. These instances are to be terminated if they attempt to reproduce. The enclosure is to be cleaned on a weekly basis. Personnel are to ensure that any webs created by SCP-5267-1 are not damaged in the cleaning process. The edges of the chamber are to be lined with 3 (three) layers of iron, zinc, and copper in order to resist SCP-5267's corrosive saliva
Description: Description: SCP-5267 is a large eight-limbed creature, similar in appearance to that of an arachnid of the Theraphosidae family of arthropods. Subject appears to have originally been humanoid but appears to be in advanced stages of decay as a result of its physical deformities, which include three extra sets of smaller eyes around the ocular cavities, the addition of chelicerae1 in place of canines, which appear to have greatly damaged the rest of its skull, with the lower jaw being nearly torn in half, the forehead and cheekbones becoming warped backward in a similar fashion to how a tarantula’s head and thorax are fused together to create the prosoma. The nose of SCP-5267 appears to be missing, but this is likely a result of its already decaying qualities.
SCP-5267 is very agile and extremely hostile towards any mammal it senses, and usually attacks by swiftly crawling up the nearest wall and attempting to lunge at its victims. It has also been observed slashing with what are presumed to be its hands, which have been sharpened to the bones, and sometimes assaults its prey at a range by spitting a highly corrosive fluid which does little damage to organic matter but has been observed to melt through steel.2. Despite its wide range of attacks, as well as the fact that SCP-5267’s combat strategy greatly differs depending on its victim, barely any of SCP-5267’s assaults are fatal. The reason for this is unknown. This tactic is used by SCP-5267 to ensure the victim’s transformation into SCP-5267-1. (See Incident 5267-1)
Incident 5267-1-A: SCP-5267s first sighting was on █/██/201█, approximately one hour after a containment breach at Site-██ resulting in several missing high-importance SCPs, Agent Kenneth █████ was assaulted by the anomaly when getting off the subway after being reassigned to the site and was immediately taken to the medical ward. Surprisingly, the subject's wounds seemed to heal only one day after the attack, despite the gashes cutting almost 2 centimeters deep into the agent's skin. Agent █████ was a former police sketch-artist, and keeps a notebook on his person at nearly all times. When confronted by Head Researcher Krustovsky about the incident, Agent █████ described “not being able to get the damn thing out of his head.” Agent █████ was asked if he could possibly give a sketch of SCP-5267, and hesitantly obliged. This sketch is now the photo used for SCP-5267’s main file, and will be used in all files for SCP-5267 until accurate footage of SCP-5267 can be acquired or containment for the anomaly is established. At the conclusion of the interview, the agent obscurely stated “We haven’t forgotten about what you did.” Agent █████ will be monitored and will be given Class-C amnestics to counter the possible psychological trauma that SCP-5267's assault caused.
Incident 5267-1-B: Approximately 1 (One) day after being administered amnestics, Agent █████ reported having auditory and visual hallucinations, despite having no memory of the SCP-5267's first attack, as well as “excruciating headaches and muscle cramps.” Agent █████ was placed in the medical ward for medical and psychiatric evaluation. Upon receiving several X-rays and MRI examinations, it was revealed that as a result of SCP-5267’s attacks, a lethal prion similar to both SCP-███ and SCP-███ was transmitted into the agent’s bloodstream, causing the subject to begin transforming into an entity similar to SCP-5267. During this period, Agent █████ reported hearing messages along the lines of “They did this to me. Who says you’re safe?,” several monologues about “the cost of immortality,” and other messages referring to a “mother,” keeping him safe if he were to “come home”, seemingly referring to SCP-5267. The agent also showed signs of extreme arachnophobia and paranoia, and reportedly experienced several visual hallucinations involving spiders and other insects swarming around him. The agent was placed in quarantine to prevent possible transmission of this disease.
At 22:32 on █/██/201█, Agent █████ began vocalizing, showing clear signs of excruciating pain. Within ten minutes of these vocalizations, the agent began showing physical attributes similar to SCP-5267, but more humanoid in appearance overall3. This new anomaly spawned by the prion transmitted by SCP-5267 is hereby referred to as SCP-5267-1. The newly-created instance of SCP-5267-1 was seen spitting a similar corrosive fluid to SCP-5267 in order to melt a hole in its padded cell to escape through. Subject was not as agile as SCP-5267, but managed to outrun nearly all agents attempting to subdue it using a “spinneret” not previously seen in SCP-5267. The instance of SCP-5267-1 was terminated by MTF Lambda-12 upon arriving at the subway tunnels.
Since this incident SCP-5267 has been seemingly abducting personnel at random, and has been seen hunting in packs with 2-4 SCP-5267-1 at its flanks, although it has still been observed hunting alone on various occasions. Containment procedures have been revised as a result of this previously unseen ability of SCP-5267. SCP-5267-1 have not been observed to transmit the prion, meaning that it is likely a property that is exclusive to SCP-5267. Oddly, many SCP-5267-1 instances have been observed using the same spinneret seen in the first recorded SCP-5267-1, despite SCP-5267 not utilizing this ability. Many of the specimens have been seen using it for traps, enhanced maneuverability and acrobatics, and even creating nests (See Addendum 5267-1-A.)
Addendum 5267-1-A: Approximately one week after SCP-5267-1’s discovery, SCP-5267-1 “nesting grounds” were discovered in the Armed Research and Containment Site 48 maintenance tunnels. SCP-5267-1 instances appear to have developed a complex society in which different instances are assigned different roles. Along with this, a possible reproduction cycle has also been discovered. Instances which have spinnerets appear to be the "males" of the species, are incredibly agile and are responsible for the creation of nests. Females do not leave the nests often and mostly serve as concubines in order to ensure that SCP-5267-1 the species is plentiful in numbers. A handpicked group consisting of SCP-5267-1 instances of either gender are chosen as SCP-5267’s “royal guard,” which will almost always flank SCP-5267 when it leaves the nest. Despite being referred to as a “mother,” to SCP-5267-1 instances, (as described by hallucinations during the transformation into a SCP-5267-1 specimen,) SCP-5267 appears to be a male, but whether or not SCP-5267 abides by the same rules of sexual dimorphism as SCP-5267-1 is unclear due to their drastically different physical traits. Because of this discovery, it is likely that SCP-5267 only utilized its signature prion to ensure that the initial SCP-5267-1 population would grow into a proper, self-sustaining civilization with menial effort.
As the species grows exponentially, more Foundation personnel are either attacked or abducted by SCP-5267, and SCP-5267-1. One situation of note is an incident where Researcher ██████ was slashed across the face by SCP-5267. The researcher immediately entered shock and experienced seizure-like convulsions. Subject was found on the floor of Gate C at Site-12, repeatedly vocalizing the word “Frauds.” After MTF Beta-7 was called in to contain the situation, Researcher ██████ had already died of these shock-like symptoms before he could enter the transformation phase of infection. Due to the species' openly aggressive nature towards humans and other mammals, as well as its attempts to deliberately undermine the Foundation, it has been hypothesized that SCP-5267 plans to insert its kind into the world and cause an SK-Class Dominance Shift Scenario, and for SCP-5267-1 replace humans in society. However, as long as SCP-5267-1 populations are suppressed by MTFs Lambda-12 and Beta-7, and remain in the now sealed Foundation subway tunnels, SCP-5267 is considered a neutralized threat.
Addendum 5267-A: On ██/██/201█, Head Researcher Krustovsky dispatched the following notice:
To all researchers working on the SCP 5267 project,
I wish I could speak to you all under less grim circumstances, but it appears that many researchers are uncertain of the future of the SCP-5267 project, upon uncovering that there’s a whole species of these things living under some of our most valuable facilities, many anxious researchers have demanded reclassification of SCP-5267 to full Keter. I understand these concerns. The most common claim is that it could be very dangerous if a whole nest of these things escape. If they escape. There’s a reason why we’re only Potential Keter for now. We’ve already got Lambda-12 constantly inspecting the tunnels, and look at them; They still have yet to lose a single man. It’s more likely that the tram itself is an instance of 2086 than for the Queen and her guards to melt through it and convert you. To put it simply, we got lucky. Lucky that we could seal those tunnels before a thousand human-spider hybrids could come rampaging through the streets. Do you know why 3199 and 939 are Keter and 5267 is not? Those things are still in the wild. A regular person can get their voice stolen by a pack of vicious 939 at a moment’s notice. A guy can be taking a hike and minding their own business, and get liquified by a shrieking 3199. Even if it might be more dangerous, especially with its openly malicious attitude towards the Foundation, as long as 5267 doesn’t reach the wild, they’re sealed from the public, and we won’t have to think about their effects on a grander scale. Overall, be thankful that 5267 is only Potential Keter, but don’t think it isn’t capable of causing an SK-Class Dominance Shift Scenario. Take things seriously for once; It might just save the world.
Dr. Dominic H Krustovsky,
SCP-5268 Project Lead
Armed Research and Containment Site-48
