Generally the process begins at the level of gross anatomy: 
quadrupedal organisms will develop leg musculature for a bipedal 
stance, they will develop opposable thumbs on their hands or 
equivalent structures, and will develop in size and stature to a 
minimum standing (bipedal) height of approximately 1 meter. 
(Animals already larger than this will stay the same size, though they 
will develop other quasi-human features.) Additionally, virtually all 
animals will develop larger brains, with expansion most often seen in 
areas relating to language.3 Subjects will continue to practice 
SCP-1258, even in the absence of an instructor or any materials 
related to SCP-1258; they may display knowledge of forms and 
movements which they have not been previously exposed to.4 
Continual exposure will cause further expansion and development 
along these lines, and eventually development of the vocal cords (or 
equivalent structures), jaw, and esophagus. After enough exposure, 
subjects will be able to communicate verbally in human languages.° 
Subjects’ intelligence will increase appreciably as they continue to 
practice SCP-1258 routines and forms, usually to between 110 and 
140 1.Q. as measured by standard Foundation tests. Eventually, test 
subjects will refuse to cooperate with humans in any capacity and 
will begin attempting to escape confinement by any means. 


For a partial list of animal experiments, refer to Experiment Log 
1258. 


+ Addendum: Origins of SCP-1258 


Addendum: Origins of SCP-1258: The time and exact 
place of origin of SCP-1258 are unknown. Some of its 
forms are superficially similar to the Korean martial art 
taekkyeon, which may place its development as early as 
the beginning of the Three Kingdoms Era (57 C.E.); 
however, due to taekkyeon's resurgence following the 
end of the Japanese occupation of Korea in 1945, and 
the cross-pollination between many East Asian martial 
arts, SCP-1258 may be a much more recent 
development, or may be of entirely different origin. 
Further investigation is impossible barring the discovery 
of more material. 


+ Recovery Log 


Recovery Log: SCP-1258 was first discovered as part 
of a routine internet search for anomalous artifacts, 
events, or persons. On / /201 , the YouTube channel of 
user 'WayFyre91,' real name Isaac Waymire, was found. 
Of the thirty-seven (37) videos on Waymire's channel, 
the first thirty-three (33) were of no value.® In the thirty- 
third video, Waymire mentioned that he had begun 
taking martial arts lessons at a nearby school. The 
remaining 4 videos had been made within the space of 
roughly three (3) months. Transcripts of some of the 
relevant videos follow.’ 


Video: 01 
<Begin transcript> 


0:00:02: [Waymire steps into field of view, 
presumably after activating the camera.] 


0:00:05-0:00:24: Waymire: Okay, uh, | just 
started taking lessons at the dojo, and ... and 
you guys, you need to see this. | was 
practicing in front of Caesar® and ... just 
watch. 


0:00:25-0:00:38: [Waymire briefly steps off- 
camera, returning with Caesar in his arms. He 
places Caesar on the floor.] 


0:00:38-0:02:15: [Waymire performs an 
SCP-1258 routine. Caesar begins watching 
Waymire immediately. At 0:00:44, Caesar 
stands on his hind legs and begins imitating 
Waymire's movements. His balance appears 
to be poor and his range of motion is limited, 
but he attempts to follow the remainder of 
Waymire's routine. At the conclusion of his 
practice, Waymire begins laughing. He feeds a 
treat to Caesar, then picks him up and faces 
the camera.] 


0:02:15-0:02:23: Waymire: My little warrior! 


0:02:23-0:02:26: [Waymire moves behind the 
camera, and the recording ends.] 


Video: 02 
<Begin transcript> 


0:00:02:-0:03:56 [This video is a montage of 
multiple recordings of Waymire and Caesar 
practicing SCP-1258. There is no audible 
dialogue; instead, a German-language version 
of the song "Eye of the Tiger" plays over the 
video.] 


Notes: Due to the montage editing of this 
video, it is impossible to tell in what order the 
original sequences were filmed. However, 
Caesar is seemingly larger and has more 
developed musculature in his front and back 
legs. In certain shots, it appears that his 
muzzle is elongated as well, though the low 
resolution makes this difficult to verify. 


Video: 03 
<Begin transcript> 


0:00:02: [Extreme close-up of Waymire's face. 
He is outside his bedroom.] 


0:00:03-0:00:27: Waymire: Okay, uh ... 
Caesar's been acting ... really weird lately, 
and ... he ... just watch this. 


0:00:27-0:01:44: [Camera pans away from 
Waymire's face. The door to his bedroom is 
slightly ajar, and the camera is placed to sight 
into the bedroom. Caesar can be seen 
practicing an SCP-1258 form. Foundation 
martial arts experts note that this form is more 


advanced than had been seen in previous 
videos. Caesar is also noticeably larger, and 
has a much steadier bipedal stance.] 


0:01:45-0:01:49: [Camera moves back to 
Waymire while Caesar continues to practice. ] 


0:01:50-0:02:12: Waymire: | ... I'm not sure 
what's going on. I'm going to keep a close eye 
on him. 


Video: 04 
<Begin transcript> 


0:00:00: [Video opens on Caesar, in 
Waymire's bedroom. Waymire is not seen in 
the video; presumably he is holding the 
camera. Caesar is approximately twice his 
original size. His limbs are heavily muscled, 
and the skin has stretch marks, presumably 
from rapid growth. He is standing in what 
appears to be a basic SCP-1258 stance. ] 


0:00:01-0:00:11: Waymire: What is your 
name? 


0:00:13-0:00:29: Caesar: | ... am called ... 
Caesar. 


0:00:30-0:00:45: Waymire (breathing 
heavily): Why ... how can you talk? 


0:00:46-0:01:11: Caesar: | ... have learned. 
Through learning ... | became ... more. 


0:01:12-0:01:21: Waymire (stuttering): Www 
... what d-do ... 


0:01 :22-0:01:24: Caesar: Ask it. 
0:01:25-0:01:41: Waymire: What will you do 


with your ... learning? 


0:01 :42-0:02:22: Caesar: | will ... change ... 
the world. | ... will make us ... free. | will ... kill 
... the masters. 


0:02:23-0:02:28: [Caesar stops speaking but 
continues to stare at the camera. Waymire's 
breathing can be heard as well.9] 


0:02:29-0:02:31: Waymire: Is—is that 
enough? Can |I— 


0:02:31: [Caesar moves forward ina 
threatening manner. Camera jerks, likely due 
to Waymire flinching.] 


0:02:32-0:02:45: Caesar: You ... will not ... 
ask! You will ... tell ... the masters! They ... 
must know. 


0:02:46-0:02:51: [Camera holds steady on 
Caesar until end of video.] 


Using the IP address Waymire had uploaded the videos 
from and clues within the videos themselves, the 
Foundation traced him to the town of , Germany. 
Waymire was found dead in his apartment, with time of 
death approximately two days prior. Cause of death was 
determined to be blunt force trauma indicative of physical 
confrontation. Both of Waymire's legs and his right arm 
had been broken, along with seven ribs, and most of his 
internal organs were severely damaged or ruptured. 
Waymire's jaw was broken in several places, including 
two apparently post-mortem breaks. 


Foundation agents followed reports of attacks on hikers, 
as well as sightings of a "standing wolf" or "hairy dwarf", 
to a forest roughly east of . The bodies of two 
hikers with wounds similar to Waymire's were found 
approximately seventeen kilometers from the city. Their 


bodies had been dragged into a small stream and 
partially eaten. Caesar, now designated SCP-1258-1-01, 
was eventually located and confronted after a three-day 
pursuit. Two agents were killed and four more injured; 
SCP-1258-1-01 was shot and killed. 


+ Addendum: Document 1258-RX 


Addendum: Document 1258-RX: In January 201 , 
multiple incidents of wild animals attacking humans were 
reported in the town of , Colorado, USA. Some 
victims reported packs made up of multiple species, 
including predator and prey species together. The 
Foundation investigated and found widespread usage of 
SCP-1258. Sterilization of all wild and domesticated 
animals within a fifty-kilometer radius of the city, under 
guise of response to a rabies outbreak, was carried out 
without incident. Investigation led to a recently-opened 
dojo within the city; however, the dojo had burned down 
several days prior to the Foundation response.!9 No 
remarkable equipment was found in the dojo, and most 
documents were burned beyond retrieval. The only 
recoverable fragment of note has been classified as 
document 1258-RX, and appears to be a handwritten, 
incomplete translation into English of another document. 
The original document, if one existed, was not found. 


Learn the ways of THE MASTERS!!! We can 
Anyone can learn to stand as tall as man other 
men and confront the world! 

WE CAN teach you to be (bigger? tougher? 
taller?). 

WE CAN make you give you a fighting chance 
against humanity (the world? society?) 

MAKE YOURSELF BETTER! (maybe 
"improve yourself"? "change yourself"?) Find a 
NEW WAY! We know the SECRETS OF THE 
MASTERS passed handed down through the 
millennia ages! 

If they will not see us as equals, then we will 


BECOME equals! [This line was struck through 
twice.] 

When we are all equals, we 

[The remainder of the document was 
destroyed.] 


Footnotes 

1. Placental mammals only: marsupials display no anomalous 
effects. 

2. Even a single exposure to SCP-1258 may be enough to cause 
these anomalous developments. Exact period of exposure 
necessary depends on multiple factors, including the species of 
subject, time spent performing, the skill of the human performer, and 
so forth. See Experiment Log below for further information. 

3. These transformations require vastly increased nutritional intake, 
beyond what a healthy specimen should be able to consume 
normally. It is theorized SCP-1258 also speeds up metabolic 
processes in such a way as to allow for this high rate of growth. 
Without adequate nutrition, subjects’ growth will be retarded, but will 
progress. 

4. This anomalous knowledge is theorized to be another side-effect 
of exposure to SCP-1258. 

5. Generally, animals will have access to the language and 
vocabulary they were exposed to prior to their development by 
SCP-1258; for example, an animal raised by a English speaker will 
have retroactively "learned" the English they heard their owner 
speaking. Furthermore, most animals also show language 
acquisition skills comparable to a human toddler, allowing them to 
learn at an accelerated rate. 

6. Major topics included Waymire reviewing films or video games, 
responding to friends’ videos, or diary-style entries about his 
personal life. 

7. Dialogue has been translated from the original German. 

8. Waymire's pet dog, apparently a terrier mix. Exact breed 
composition is unknown. 

9. According to Foundation analysis, Waymire's labored breathing is 
probably due to an agitated emotional state, although he may also 
have suffered damage to his throat, lungs, or thoracic cavity. 

10. The cause of the fire was unclear. 


« SCP-1257 | SCP-1258 | SCP-1259 » 


Experiment Log 1258 


Experiment Log: A summarized version of the experiment log for 
SCP-1258 is given below; a full log can be found in the document 
cabinet in Site-19. 


Procedure: In order to minimize exposure to and potential 
outbreaks of SCP-1258, a Foundation agent with experience in 
multiple forms of martial arts was given access to all materials 
related to SCP-1258. The agent practiced multiple forms until 
performance was satisfactory. The agent was recorded performing 
all Known forms and movements, then given targeted class-B 
amnestics to remove all knowledge of SCP-1258.! These recordings 
were then played back to groups of animals of varying species. 


Species: Canis lupis familiaris, domestic dog, varying breeds, thirty- 
seven specimens (twenty-five males, thirteen females). 

Exposure time: Ten minutes per hour, eight hours per day. One 
specimen killed and autopsied at end of each day. 

Results: All specimens began watching immediately. Twenty-nine 
specimens attempted to copy movements during first exposure; all 
individuals copied movements during second exposure. Increased 
appetite following first day; additional protein and other supplements 
provided. Further increases needed on following days. Alterations in 
gross musculature seen following day seven. Alterations in bone 
structure seen following day twelve. Increased cranial diameter and 
altered vocal cords seen following day fourteen. Modified |.Q. test 
was presented on day fourteen; average score was 77. 

Notes: Experiment was forced to terminate prematurely. On day 
fifteen, one specimen displayed unexpected agitation and 
aggression. When handlers entered the containment area to remove 
the specimen, all specimens attacked simultaneously. Emergency 
lockdown procedures enacted immediately; all soecimens killed via 
nerve gas. Autopsies were consistent with observed results. 


Species: Rattus norvegicus, laboratory rat, forty-two specimens 


(twenty-six males, sixteen females). Normal nutritional supplement 
for a colony of this size was initially tripled. 

Exposure time: Ten minutes per hour, eight hours per day. One 
specimen killed and autopsied at end of each day. 

Results: All specimens began watching immediately. Twenty 
specimens attempted to copy movements during first exposure; 
thirteen additional specimens copied movements during second 
exposure; all soecimens copied movements during third exposure. 
Alterations in gross musculature seen following day ten. Alterations 
in bone structure seen following day thirteen. Population randomly 
sorted into two groups following day thirteen; control group received 
no further exposure, while experiment group continued standard 
exposure. Control group continued to perform SCP-1258 
movements despite lack of exposure. Both groups showed 
continued physical development, though control group's 
development was comparatively slower. (More precise data can be 
found in detailed experiment log.) Modified |.Q. tests presented to 
both groups on day twenty-two; control group averaged 63, while 
experiment group averaged 74. By day twenty-seven, experiment 
group was communicating largely in spoken English and was 
overheard planning escape from containment. 

Notes: Experiment was terminated prematurely due to concerns 
over possible escape. 


Species: Myotis californicus, California bat, seven specimens (six 
females, one male). Normal nutritional supplement for a group of 
this size was initially tripled. 

Exposure time: Ten minutes per hour, eight hours per day. One 
specimen killed and autopsied at end of each week. 

Results: All specimens began watching immediately. All specimens 
attempted to copy movements during first exposure, although 
movements were noticeably impaired by wing membranes. Major 
alterations in musculature, skeletal system, and cranial size seen 
following week one. By day eight, four of the remaining specimens 
were unable to fly due to diminished wing membranes; by day nine 
the other two had similarly lost flight capability. Two specimens 
showed bipedal movement on day ten; by day eleven all specimens 
were walking bipedally. Specimens began functioning during 
daylight hours on day twelve. Alterations in eye structure and vocal 
cords seen following week two. Specimens became fully diurnal on 


day fifteen. Subjects were conversing in English on day sixteen, 
though only in ultrasonic frequencies.