On / /20 , SCP-3663's behaviour diverged briefly from established 
patterns. At 14:20, the entity emerged from the Site-54 maintenance 
tunnels and began to emit vocalisations in excess of 80 dB. These 
vocalisations, described as ‘pained’ by on-site staff, had a profound 
psychological effect, placing many personnel into a state of shock’. 
For ~4 hours, SCP-3663 wandered the facility, attacking staff and 
engaging in small-scale vandalism of facilities. Of note is the fact 
that SCP-3663 repeatedly attempted self-harm, by means of knives, 
pipes, water taps, and firearms. While SCP-3663 was repeatedly 


destroyed in this process, it subsequently re-manifested in the 
nearest air duct or maintenance area. 


Following the event, two bodies of former personnel were recovered 
from within Site-54. Autopsies showed the cause of death was a 
buildup of paper residue/wood pulp in all major blood vessels, as 
well as sinuses, ear tubes, and the majority of the digestive and 
respiratory systems. A number of other staff members were found to 
have been affected to a lesser degree, but are expected to make full 
recoveries. The entity's object class and definition of an SCP-3663- 
Applicable area have been updated accordingly. 


Subsequent information gathering revealed that this event coincided 
almost exactly with the death of POI-3663-12, who died of natural 
causes at the age of 79. Prior to their death, the individual in 
question had led an entirely unremarkable life, with no connection to 
any other anomalous groups, individuals, or objects. Attempts to 
establish a connection with the creation or origin of SCP-3663 are 
currently ongoing. 


Addendum.3: Discovery Log: 
> Show Video Transcript 3663-1 


Foreword: The following is a transcript of 
Video 3663-1, recovered from civilian CCTV 
footage in [REDACTED]. The footage displays 
the first recorded evidence of SCP-3663's 
existence; prior to this date, no records, 
sightings, or physical disturbances suggesting 
anomalous activity relating to the entity have 
been found. 


<Begin transcript [15:22, 08/09/1979]> 


00:00: Two young children, both males 
between the ages of 8 and 12, are seen 
playing in an abandoned construction yard. 
One (designated POI-3663-1) is running from 
the other (designated POI-3663-2), who is 
wearing a crude cardboard 'suit’ resembling 


SCP-3663. 


00:23: Both individuals leave the camera's 
view briefly, before returning. The 'game' they 
are playing seems to revolve around -2 
chasing -1 through an unfinished water 
drainage system. POI-3663-2 repeatedly grabs 
-1 and attempts to pull them deeper into the 
tunnel; likewise, POI-3663-1 uses a number of 
make-believe weapons to fend off the 
assaults. 


01:04: The sky is observed darkening slightly 
as POI-3663-1 trips on a length of pipe. 
POI-3663-2 is seen speaking, grabbing -1 and 
pulling them upright. POI-3663-1 pushes them 
away, apparently angered. POI-3663-2 steps 
backwards as if struck. 


01:30: POI-3663-2 begins to shudder, while 
the visible sky continues to darken.3 
POI-3663-1 clutches at their head, pointing at 
POI-3663-2 and shouting. Both children 
appear extremely distressed. 


01:50: POI-3663-2 tries, and fails, to remove 
the upper portion of their ‘suit’. 


02:49: Camera visuals are lost, replaced by 
static. A continuous hum is heard. All other 
electronic devices in a 200 m radius are also 
recorded to have failed simultaneously. 


04:12: Camera visuals return. Neither 
individual is in view, and no additional 
anomalies are observed. 


06:08: SCP-3663 is seen walking past the 
camera. The entity shudders briefly, clawing at 
its face before demanifesting. 


<End transcript> 


POI-3663-1 was later found lying unconscious in a 
disused subway line, over 4 000 km away. They 
displayed no memory of either SCP-3663 or POI-3663-2, 
and claimed to have been playing alone. Societal 
reintegration of the subject occurred with no 
complications. To date, neither POI-3663-2 nor any 
record of their continued existence have been recovered. 


Footnotes 

1. Phrases recorded include "Don't leave me", "I don't want this", 
and "Let me go home", among others. 

2. See Addendum.3 for more details. 

3. Note that no anomalous weather patterns were recorded for 
[REDACTED] during the period of time in question. 


SCP-3664: The Only Weapon You Need is the One in 
Your Head 


Item #: SCP-3664 
Object Class: Keter 


Special Containment Procedures: An automated system is in 
place to manage the containment and research of SCP-3664. Three 
Foundation staff assigned to SCP-3664 will be directed to Testing 
Chamber 3664 on a weekly basis, with two of the staff overseeing. 
The researcher in the chamber will be provided full information on 
the weapon and will begin testing as per orders of the overseeing 
staff. Upon conclusion of testing all researchers will be exposed to 
Countermeme Asi-Aleph to remove information on the anomaly 
needed for its usage. 


All members of Research Team 3664 must receive training on 
managing their thoughts from the Memetics Division prior to being 
exposed to knowledge of SCP-3664. Persons prone to daydreaming 
or similar behaviors will not be allowed on the team. As per orders 
by Senior Researcher Marion Wheeler, Testing Chamber 3664 is 
the only location where detailed information on the weapon is 
permitted. Persons wholly compromised by cognitohazardous 
phenomena produced by SCP-3664 will be put into appropriate 
detainment. 


Description: SCP-3664 is a metaphysical weapon that wholly exists 
as a conceptual construct. As it lacks any physical form, the only 
way to interact with SCP-3664 is to think about interacting with it. 


Personnel who have used the anomaly describe it as resembling an 
assault rifle, combined with components from laser and anti-tank 
weaponry. Multiple portions are reportedly damaged. Only 
ambiguous details on the appearance can be provided, and 
attempts at drawing it result in the subject drawing a shaded-in 
rectangle. The only known way to improve the detail of descriptions 


most beautiful thing he'd ever seen. He never was 
religious, but he said that he'd found God. He said he 
only wanted me to see what God had shown him. 

We don't leave our people behind. We just... we don't. 


<End Log> 


Closing Statement: Professor and associates present on the 
research vessel _are confirmed to have been "acquired" by 
SCP-473. Recommend extreme measures be taken to prevent 
personnel and civilians from expiring in close proximity to SCP-473. 
Currently advise maintaining containment at present location due to 
the inherent danger of recovery and the threat of exponential 
strengthening through acquisition of Class-D subjects at any given 
Site. 


Note: Interview subject J. _'s corpse was found in his quarters on 
April 24, 20 ; suicide is suspected. A note nearby read "| 
SHOULDNT HAVE LEFT THEM". Testing of SCP-473 as a possible 
cognitohazard is recommended. 


Addendum 2: 

Continuing research has found that one Professor led the 
doomed University expedition to the site of SCP-473. Though his 
research notes appear to have been lost with him, his last out-going 
email includes some context of his expedition. 


Sent 1/15/20 

Samantha, 

You're right, the research papers are wordy and | could 
never put my opinion in them anyway. 


You already know that he led a small army south to 
Ecuador and eventually killed the high priest in charge of 
appeasing Supai. But it seems that he also captured his 
two daughters and arranged to have them sent back to 
Spain as examples of the indigenous population. Sick 
bastard wanted them as trophies, or worse. Anyway, the 
ship's manifest listed a number of cultural artifacts in the 
girls' personal belongings. On that list was an item that | 


is through the use of mnestic drugs. 


The minimum amount of information needed for a subject to interact 
with SCP-3664 is a description of its appearance. Once this is 
completed the subject can fire the weapon by thinking about firing it, 
which will cause anomalous events to occur in the vicinity of the 
subject. 


Through a trial-and-error process of guessing the weapon's 
functions, researchers have created a list of anomalous events and 
their corresponding thoughts, provided below. 


Thought Outcome 

Fire/Pull trigger Three projectiles composed of 
plasma will be ejected from in 
front of the subject, following their 
line of sight until impacting an 
object. 

Cloak/Hide The subject stops receiving all 
sensory stimuli from their 
environment for a period of 2 
minutes. On occasion, subjects 
get a faint sense of nearby 
objects or movement. 

Enable tracking beacon A repeating soft thrumming sound 
is heard by the subject, 
originating from a position behind 
them. Following the initial tracking 
beacon test, the sound has been 
heard by subjects in all 
subsequent tests, lasting for a 
short interval after each use of the 
anomaly. 

Fire at self The subject becomes unable to 
perceive smoke and persons 
wearing gray formal attire. 

Activate primary laser An indiscernable projectile ejects 
from in front of the subject and 
penetrates into the head of the 
nearest person, leaving no 


Bludgeon 


Activate secondary laser 


Fire rocket 


injuries. The person will begin 
conceptually degrading, with 
details on their appearance 
becoming less defined and 
visually blurry as they forget 
details on their identity. Persons 
that begin questioning their own 
existence will permanently vanish. 
Administering mnestics and 
providing false information on the 
person's identity will reverse and 
end these effects. 

The subject vanishes, 
reappearing after one minute. 
Upon reappearing, the testing 
chamber enters a state of severe 
disrepair and has viscera 
manifest along its walls and floor. 
The viscera is all non-human and 
unidentifiable, with the exception 
of human eye tissues. Other 
researchers knowledgeable on 
the weapon report feeling "at 
ease” after this event Occurs. 
Persons visible to the subject 
begin perceiving their 
environment as rapidly degrading 
while changing structure, with 
areas breaking apart and falling 
into a "pit" below the floor. This 
results in severe disorientation, 
ending when the persons 
experience sensory overloads. 
Those that perceive themselves 
entering a pit experience full brain 
death. Mnestic chemicals are 
present in their bloodstreams 
during the event. 

Undetermined. Although files 
exist detailing planned 


experiments where the anti-tank 
weaponry is tested, no members 
of Research Team 3664 have any 
memory on the researchers 
involved in the planning or any 
actual tests of it. 

Self destruct A monotone voice is perceived, 
which states "You are not an MT 
—[indiscernable] agent. Access 
denied." Further testing on this 
command Is forbidden. 

Failsafe/Last resort An indiscernable projectile ejects 
from in front of the subject and 
forms a cognitohazardous symbol 
on impact, formed from human 
blood. Persons affected by the 
symbol will permanently believe 
they are a Mobile Task Force 
agent involved in an "important 
operation." These persons are 
incapable of providing further 
details. 


How SCP-3664 came to the attention of the Foundation is unknown. 


Addendum: Starting on 5/Feb/2014, members of Research Team 
3664 began reporting that they were experiencing intrusive thoughts 
during testing. These thoughts have involved the researchers 
abruptly thinking about severed limbs, a bleeding human, and 
volleys of artillery fire. On 13/Feb/2014 Researcher Linda Ward 
thought about grabbing onto the injured human. A male subject 
wearing bulletproof security armor manifested on the ground next to 
Ward, who repeatedly attempted to communicate through American 
Sign Language: 


FOLLOWED-TELL-GUN 


A loud cracking sound was heard a minute later and the subject 
expired. Inspection of the cadaver (SCP-3664-a) found large 
lacerations and bite wounds matching no known organisms on all 
sections of the body. SCP-3664-o’'s facial features, ID, fingerprints, 


and any potential identifiers cannot be wholly perceived for 
undetermined reasons. This does not affect the Foundation seal 
tattooed onto the back of the cadaver's head. 


The thrumming sound produced by the tracking beacon has since 
increased in intensity, and is reportedly heard from numerous 
positions around subjects. The sudden loss of Research Team 3664 
members' memories on SCP-3664 is under investigation. Sightings 
of bite marks and large holes on the heads of researchers are 
unverified. 


SCP-3665: Instant Demon, Just Add Blood! 


Item #: SCP-3665 
Object Class: Safe 


Special Containment Procedures: SCP-3665 is to be contained in 
a standard Safe Class locker in Site-19. In the event that the 
packaged ‘Imitation Blood’ contained within SCP-3665 runs out, 
blood obtained from D-Class personnel may be used. During testing, 
research staff are advised to ensure that the powder used in the 
activation of SCP-3665-1 is not lost. 


Description: SCP-3665 is a 15x10x3.5cm package of a powdery 
substance, labelled as 'Instant Demon, Just Add Blood!’, with a 
depiction of a stylized male and female demon, with ram-like horns, 
and bat-like wings, on either side of the text. Inside the package, 
there is a moderate amount of dry powder of an unidentified 
substance, or mixture of substances, having the overall consistency 
of talcum powder. Also packaged is a small, plastic container of 
‘Imitation Blood’, containing what appears to be cranberry juice, red 
food coloring, and a currently unidentified substance, along with 
instructions for use. 


+ Show transcribed text obtained from instructions booklet. 


Homo, fuge!' 
Instructions 


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Add Blood!’ by Asmodeus Labs! We always 
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own home! 

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Step 1: Pour the powder out of the package, 
and onto a flat surface. 

Step 2: Drop three drops of our imitation blood 
into the powder, and use it to write your name. 
No worries for you diehard occultists out there, 
real blood works as well! 

Step 3: Wait, and enjoy! When you're done, 
just collect the powder back into the bag, and 
you're ready to use it again! 


(Back cover) 


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When these instructions are followed, the powder around the area 
where the subject's name was written will begin to steam, and will 
continue to do so for roughly twenty minutes. Following this, 
SCP-3665-1 will appear to the individual who activated SCP-3665, 
appearing first as a red mist, before adopting its usual form, 
expressing discontent that it must ‘limit itself to such a lowly form’, 
and greeting the individual who 'summoned' it.