Addendum [0-40a]: As has been verified repeatedly, the presence 
of persons born after March 1965 does not in and of itself trigger a 
hostile event. For reasons still unknown, SCP-147 objects mainly to 
manufactured items. Dr. recently conducted an experiment 
in which he clothed himself with vintage (pre-1965) articles of 
clothing, with the caveat that he had three Bic Flair pens (invented in 
the 1970s) in his shirt pocket. What he saw while seated in front of 
SCP-147, he would later describe as "a bizarre episode of / Love 
Lucy featuring a surprising amount of gunplay." 


Addendum [1-80]: Recent tests that involved exposing convicted 
rapists and psychopaths to the object while it was hostile has 
indicated that the object is able to tailor the images to the viewer. A 
rapist was strapped into a metal chair manufactured in 1986, and 
during that time not a single rape was shown on the screen, while 
scenes of genital mutilation (primarily male) occurred more often. 
Similarly, a psychopath who had tortured someone to death saw 
fewer scenes of torture, and more scenes of botched executions. 


« SCP-146 | SCP-147 | SCP-148 » 


SCP-148: The "Telekill" Alloy 


Item #: SCP-148 

Object Class: Euclid 

Special Containment Procedures: 
REVISION 3 


SCP-148 is to be stored as 120 cast ingots, each of which weighs 
approximately 10 kg at time of writing. Ingots of SCP-148 may not 
be housed at the same site as any SCP (due the potential for 
unforeseen interactions); otherwise, said ingots should be 
distributed equally among acceptable Foundation facilities. The 
mass of each contained ingot of SCP-148 must be measured and 
reported monthly. 


Under no circumstances should any SCP with mind-affecting or 
extrasensory properties come into contact with SCP-148. In the 
event of such contact, the immediate area must be evacuated and 
the affected sample of SCP-148 detonated remotely. 


Personnel are not to be assigned to SCP-148 for a period of time 
longer than three weeks. Any personnel assigned to SCP-148 are to 
be given regular psychological evaluations. 


Description: SCP-148 is a metallic substance, composed of a 
variety of known and unknown elements. The total mass of SCP-148 
on hand is approximately 1.1 1.2 tonnes. SCP-148 has a gray-green 
color with a bluish tinge and oxidizes readily in the presence of 
water. SCP-148 has a melting transition point of approximately 
4500°C and a boiling transition point of approximately 9000°C. 
SCP-148 has a density of 6.20 g/cm 6.76 g/cm? and qualifies as 
HRC 39 in a Rockwell hardness test. It exhibits material properties, 
such as strength, ductility, and workability, similar to platinum. 


SCP-148 is composed primarily of platinum and iridium, the two 
composing 62% and 20% of its mass respectively. In addition, 
several other known metals are present in its composition, including 
iron, cobalt, and copper, which collectively make up 16.5% of 
SCP-148’s mass. However, given the mass of the material, it is 
believed that there are other substances not detectable by mass 
spectrometry or other means. Images of SCP-148 taken with a 
scanning tunneling microscope show gaps in its lattice that, under 
normal circumstances, would be filled with other materials. 


SCP-148 blocks or otherwise hinders extrasensory mind-affecting 
properties of living organisms in proximity to it. This effect, while 
difficult to quantify, appears inversely proportional to the square of 
the distance from the subject to SCP-148’s surface and directly 
proportional to the quantity of SCP-148 in consideration. The range 
for which this effect is detectable is roughly 0.8 meters per kilogram 
of SCP-148. 


1.1 tonnes of SCP-148 were retrieved from the metallurgical 
department of Prometheus Labs’ base facility during the 
Foundation's sweep of the building. Documents concerned with the 
project had unveiled that the substance was to be subject to 
additional development, sold to , trademarked, and sold as 
“Telekill Alloy”. However, due to [REDACTED] and its political 
fallout, along with the destruction of the Prometheus Labs’ base 
facility, has acquired an estimated 1.3 tonnes of SCP-148 
and sold it to unknown buyers. Foundation agents and forensic 
accountants are in the process of tracking the remaining supplies of 
SCP-148. 


Addendum 148-01 

Due to its potential for use in containment of mind-affecting SCPs, 
SCP-148 has been approved for cross-testing with SCP objects. 
While tests are still in their early stages, tests with low-level 
anomalous items seem to indicate that SCP-148 will be an effective 
tool in containing said items. However, it does not appear to affect 
items whose notable properties are purely memetic. 


Addendum 148-02 
Beginning / / _ , staff reported irrational behavior and poor 
communication skills among janitorial staff tasked with regular 


maintenance of SCP-148’s containment.! After three weeks of 
increasingly abnormal behavior, two custodians were taken in for 
questioning and examination. Testing revealed that the 
aforementioned personnel were incapable of interpreting body 
language and did not appear to notice the intonation or phrasing of 
sentences. In addition, the affected subjects were incapable of 
determining the emotional state or intent of others and demonstrated 
severely limited vocabulary. 


Further testing has revealed that the language and communication 
skills of persons with regular contact or extended exposure to 
SCP-148 will, over time, deteriorate and disappear. It has been 
shown that, after eight weeks, affected subjects will be rendered 
completely mute and incapable of understanding or giving nonverbal 
requests, commands, or other statements, despite showing 
otherwise normal mental capacity. 


Addendum 148-03 

A measurement takenon // ( months after the Foundation’s 
acquisition of SCP-148) indicated that, despite no increase in 
volume, SCP-148 has increased in mass by 0.1 tonnes (a density 
increase of 9.0%). The source of this additional mass is unknown. 


Incident Report 148- -1 

To test the limits of SCP-148’s effects and its capacity to change in 
mass, 0.9 kg of it was placed on a scale and moved to SCP-__’s 
chamber. Predictably, SCP- ’s [REDACTED] was nullified by 
SCP-148’s presence. However, the sample of SCP-148 began to 
grow in mass by upwards of 5 grams per second. After one minute, 
this rate began to decrease, and SCP-148 ceased to increase in 
mass forty seconds later, at which point it weighed 1.4 kilograms. It 
remained at this mass for eight seconds before plummeting to 0.8 
kilograms in the space of two seconds. During this time, personnel 
within sixty meters (twelve times the effective range of SCP-_) 
began to experience SCP-_’s effects, albeit at a vastly increased 
rate, resulting in [DATA EXPUNGED] lockdown until the affected 
subjects could be removed. 


As of this incident, contact between SCP-148 and any mind- 
affecting items is strictly forbidden. 


Addendum 148-04 

Measurements taken since Incident 148- -1 indicate that the 
combined mass of SCP-148 is increasing at a rate of [REDACTED]. 
It is speculated that should a large quantity of SCP-148 undergo an 
event similar to the sample used in Experiment 148- , [DATA 
EXPUNGED]. Containment procedures are under review. 


Footnotes 


1. At the time, containment consisted of a single storeroom, swept 
and checked on a daily basis. 


« SCP-147 | SCP-148 | SCP-149 » 


SCP-149: The Blood Flies 


Item #: SCP-149 
Object Class: Keter 


Special Containment Procedures: SCP-149 in any of its instances 
is to be kept inside a sealed plexi-glass box for observation. Oxygen 
and a nutrient mist are to be released into the containment cell every 
two hours. If any instance of SCP-149 escapes its cell, Protocol-42- 
Charlie is to be brought into effect on any and all contaminated 
personnel, by order of O5-12, after Incident 149-1. 


Description: SCP-149 is a breed of mosquito which carries a strain 
of retrovirus (herein referred to as SCP-149-A) that mutates 
regenerating human cells into fertilized mosquito eggs. SCP-149-A 
is injected directly into the bloodstream when SCP-149 feeds. The 
SCP-149-A quickly works on the nucleus of the cells, warping the 
DNA. The first set of cells bred from these changed instructions 
closely resemble cysts, and are concentrated in the lining of the 
esophagus and the sinuses. Upon dissection, however, these 'cysts' 
are revealed to be filled with SCP-149's larvae, the cysts acting as a 
protective casing against external forces. SCP-149 appears to go 
through its maturation cycle in a matter of hours; by the time the 
subject is able to feel any effects, the first generation of SCP-149 
has already grown inside the subject's body. SCP-149 primarily 
achieves exodus through the mouth and nostrils, occasionally being 
diverted through the Sphenoid sinuses to escape through the eye 
sockets. Infection by SCP-149 is fatal, and chance of infection has 
been estimated to be 50% from one bite. 


Addendum: 


Incident 149-1: An incidence of SCP-149 escaped and infected 
multiple Class-D subjects, the majority of whom did not report 
SCP-149's contact with them. Within 5 hours, SCP-149 had matured 
in these hosts and burst out of them, infecting _ staff. It was only 


thanks to the quick thinking of Doctor , who sealed sub-levels 12 
through 15, that the entire site was not infected. As a response to 
this, O5 command has created Protocol-42-Charlie, to be used if 
SCP-149 escapes confinement. 


« SCP-148 | SCP-149 | SCP-150 » 


SCP-150: Ship of Theseus 


Item #: SCP-150 
Object Class: Keter 


Special Containment Procedures: SCP-150 patients kept for 
study should be contained in Level-3 Biohazard Containment Cells, 
with no more than 1 instance per cell. Cultures of SCP-150 are 
contained in vacuum-sealed glass flasks in the Site-42 infectious 
materials lab. Standard pathogen-handling procedures should be 
followed at all times. Any instances of SCP-150 found outside of 
containment are to be incinerated. 


Description: SCP-150 is an obligate parasite that resembles the 
tongue-eating louse (Cymothoa exigua), but is adapted to form 
conjunctive symbiotic relationships with humans for a period of its 
lifespan. Upon contact with a human subject, SCP-150 embeds itself 
deeply in the flesh of its host. Over the course of approximately 
seven days, the parasite will burrow into the host and effect 
numerous physiological alterations. 


The most glaring alteration is the gradual conversion of the limb 
nearest the infection site into a chitinous appendage: as SCP-150 
consumes the host's flesh, it excretes tissue that replaces and 
augments the functionality of the host's limb without causing 
transplant rejection. It is suspected that SCP-150 is able to secrete 
anesthetic and immunosuppressant substances to prevent the 
host's body from responding to the change. Furthermore, the 
nervous tissue excreted by SCP-150 is able to interface with the 
host's nervous system. By the time the process is complete, the host 
will be able to control the affected limb with no loss in mobility and 
often with improved strength, reflexes, and resilience. 


For a period of one to two weeks, SCP-150 will reproduce, feeding 
on nutrients from and depositing eggs! into assimilated blood 
vessels. The eggs are deposited throughout the human body via the 


bloodstream - while the vast majority of them die off, enough survive 
to begin colonizing and altering the rest of the host's body. Though 
subjects report discomfort and occasional loss of motor control 
during this process, they often will not recognize the cause of said 
discomfort. It is still unclear why the offspring do not compete with 
each other for space or resources, nor how the assimilation process 
leaves the body's cell signaling mechanisms and processes 
unaffected. SCP-150 reproduces during this assimilation process: as 
the lungs are assimilated, more eggs are produced and spread by 
the patient's coughing. Although as many as 10,000 eggs may be 
produced during this time, it is estimated that only 1% of them find 
their way into another host, of which 1% survive the host's immune 
response and implant successfully. 


Although SCP-150 inevitably results in the assimilation and 
alteration of the central nervous system, including the spinal cord 
and brain, the host's consciousness and behavior are seemingly 
unaffected. Interviews with subjects infected by SCP-150 have 
yielded little information, as infected subjects unaware of SCP-150 
claim to sense no changes or improvement in certain senses and 
faculties. While subjects aware of the infection are able to pinpoint 
the source of the change, they exhibit little to no negative feelings 
and often express positivity towards it. 


Addendum 150-E: Transcript of Exploratory Leukotomy and 
Nervous Tissue Transformation Experiments 


Two D-Class subjects, D-13732 and D-016002, were infected with 
SCP-150 and allowed to progress through all stages of the infection. 
In order to examine the full effect of the infection, exploratory 
neurosurgeries were performed on both subjects. D-13732 was 
euthanized; his nervous tissue was found to have been entirely 
replaced by smaller instances of SCP-150. The instances 
comprising his brain matter were extracted and stored for 
experimentation on D-016002. 


The following decompressive craniotomy and leukotomy were 
performed by Dr. Harlan Sun, Dr. Wendy Robin, and Dr. Alex 
Harlow on D-016002. A full transcript follows. 


<Begin Log, 21:43> 


(D-016002 is partially anesthetized to numb her during 
the initial drilling of the skull. The process is uneventtul, 
though Harlow reports expecting less resistance from the 
skull while drilling into and cutting a flap from it. Upon 
removing the flap of bone and exposing the dura mater, 
numerous smaller instances of SCP-150 are observed 
lying in the cranial cavity where the brain should be. 
Harlow reports this to Robin, who alerts Sun to begin the 
interview process while she marks off areas of 
D-016002's brain on a mapping projection.) 


Dr. Sun: What is your name? 
D-016002: Mako [REDACTED]. 

Dr. Sun: Name something to sit in. 
D-016002: Chair. 

Dr. Sun: What is the color of grass? 
D-016002: Green. 

Dr. Sun: What is one plus one? 
(D-016002 pauses for a moment.) 
D-016002: Two. 


Dr. Robin: We have marked off the approximate location 
of the Wernicke's area. 


Dr. Harlow: Thank you, Doctor. Sun, | will now extract 
some of the specimens from this area. 


(Dr. Harlow carefully makes an incision into the dura 
mater and extracts some of the instances from the area 
using forceps. He places each instance into a glass vial, 
corks it, and places it on a nearby stand. Each instance 
appears to stir to life and begin wriggling only upon being 
removed. This process takes approximately ten minutes, 
during which time Sun repeatedly asks D-016002 the 


same questions. Once Harlow has extracted 
approximately 100 instances, he gestures for Sun to 
continue.) 


Dr. Sun: Name something to sit in. 
D-016002: Uh... uh, seat. 

Dr. Sun: What is the color of grass? 
D-016002: Green? 

Dr. Sun: What is one plus one? 
D-016002: ...two. 


Dr. Sun: Note for the record that D-016002's responses 
have been slightly slowed. This indicates that the 
instances within her cranial cavity are indeed acting as 
neuron analogues, though it is unclear as to how many 
neurons each instance is equivalent to. 


Dr. Harlow: | am placing a sample of neural tissue 
acquired from D-13732 into D-016002 now. The 
instances from D-13732 have been tagged with a 
radioactive luminescent dye to distinguish them for 
extraction later. 


Dr. Sun: Name something to sit in. 
D-016002: Couch. 

Dr. Sun: What is the color of grass? 
D-016002: Blue. 

Dr. Sun: What is one plus one? 
D-016002: Two.