Per 
Item #: SCP–XXXX
Object Class: Safe
Special Containment Procedures: SCP–XXXX is currently contained in an underground cell at site [REDACTED]. The connecting corridors walls were rebuilt after its installation to make the corridor too small to fit it back through, in case of attempted theft. Two armed guards must be present outside at all times, and the corridor and cell must be constantly monitored by CCTV. Requests to study SCP–XXXX must be approved by Dr Mishima.
Description: SCP–XXXX is a 4x4x4m metal cube, discovered in a long disused Siberian bunker near the town of [REDACTED]. The bunker appears to predate its installation and to have been deserted before it was installed there.
SCP–XXXX is hollow, with five walls of 20cm thick steel and one largely taken up by a 3x3x3m viewing window made of equally thick toughened glass, which functions as a door. There appears to be no way to open the door from the inside. To the right of the door, next to the two handles cut into it, is a corroded steel plaque. It appears to once have been covered with writing, but now all that can be read are several unexplained numbers and the word EVOLVE.
No control panels can be made out, the walls and door appear x-ray proof and the inside metal walls glow with an unnatural and unexplained white light. On discovery the interior was covered with a tangled mass of flesh and foliage, some of which tested positive for human DNA. The rest was unidentifiable.
The foundation became aware of SCP–XXXX after receiving reports of a monster attack in [REDACTED], with descriptions of "something that used to be human". The monster was never found, but investigators soon discovered the nearby bunker. SCP–XXXX was moved to [REDACTED] shortly thereafter for examination, along with a number of documents found nearby.
When living organisms are placed within SCP–XXXX they slowly begin to mutate. New appendages, human or otherwise, grow within and without their body, with seemingly little rhyme or reason as to how or why. Dr Mishima's experimental notes are as follows:
Experiment 1: Subject D-6437 entered a state of panic fourteen hours after entering the chamber, insisting something was moving inside him, though no outward symptoms could be seen. After fifty-six hours, seemingly unaffected by his lack of food or water during this time, he suddenly clutched his chest and collapsed, dying within minutes. The autopsy discovered flowers and thin tree branches had grown throughout his body, snaking their way round organs, all covered in blood. The cause of death was determined to be a branch growing straight through the aortal wall.
Experiment 2: Subject D–6942 appeared normal for the first eighteen hours of containment, but afterwards began to clutch his mouth and his speech began to degrade. Nine hours later he convulsed, causing him to face the viewing window for the first time since he had begun deliberately hiding his face from it. A mass of thick tentacles were beginning to force their way out of his mouth, and after he died a few hours later the cause of death was determined to be a tentacle growing back up into his nasal cavity and blocking his airway. The tentacles had formed from his mucous membranes, and he had tried to bite through them on more than one occasion.
Experiment 3: Subject D-6214 was placed inside along with a tame wolf. After twelve hours the two were seen huddling together in a rear corner. After twenty-four hours the researcher noticed the two had begun to merge, and after thirty-six hours this had resulted in a bipedal hybrid creature, partially covered in fur with a tail growing from its left thigh and part of a wolf head protruding from the left side of its human head (sharing three eyes between them). Three hours later the creature began to vomit up blood, fell into a convulsive fit and died. There appears to be no method to how this device operates. Outside of use as a toy or an elaborate torture device I cannot imagine a purpose for it.
The documents found near SCP-XXXX in the bunker, in stacks beside a bed and some primitive furniture, have proved largely impossible to decipher. They are written in various, often unique, ciphers encrypting a wide variety of languages, including English, Japanese, Tagalog, Xhosa, Navajo, Hieroglyphics and High Valyrian.
The ciphers themselves are incredibly complex and/or obscure, one being discovered by a particularly eagle-eyed researcher to consist entirely of references to the work of W.B Yeats. Fewer than 1% have been translated, the remainder consisting of elaborate technical drawings and page after page of neatly typed gibberish. The few that are legible mostly give an insight into the psychology of SCP–XXXX's creator:
Document #XXXX-4: "–and it is the inevitable fate of all life to be consumed by the void. We are built to decay, as entropy always gets its due, and the only way to avoid a death by stagnation is to adapt to the new world. Humans are systems that try to maintain themselves through thick and thin and so they will eventually perish. But if we can change this, if evolution can take place within an organism rather than between generations, we need never die."
Document #XXXX-13: "–managing to encourage it now at a remarkable rate, but I do not see any way to direct it. By its nature it is random, throwing every possible thing at the wall to see what sticks. Maybe there is no way. But the failure rate is so high. We would need to put so many through to see a good result that it would need to be carried out on an industrial scale to have any chance of working. And no one would ever allow that, even if the future of the human race was at stake. The police are in the town now. I don't know who called them but my radio picked up a broadcast of a warning that a serial killer is loose in [REDACTED]. I'm running out of test subjects."
Document #XXXX-14: "It reached the village. The sounds of a police report crackled on my radio, reporting that a "monster" had been sighted in [REDACTED], screaming unintelligibly. It looked so docile sitting there on the floor when I opened the door. I never expected it to launch itself at me like that, knocking me to the ground and running for the exit. It screams were near inhuman, but I could make out the constant, repeated refrain: "Help me!" There's nothing I can do now. The police will no doubt find this place, and I am not a man who could evade them for long. I guess there's only one path left to me. No guts, no glory, I guess."
