Per 
Special Containment Procedures: Currently, SCP-XXXX is currently uncontained and uncontainable. Containment efforts are to primarily focus around manual and analog tracking and monitoring, with four members of MTF-ILLU-12 ("Sketchy Characters") assigned to monitor SCP-XXXX at any time. Any member of MTF-ILLU-12 placed on assignment is to be given a copy of this document by the current head researcher1, which is to be returned upon being recalled from assignment to the object. More members of MTF-ILLU-12 may be assigned at the digression of the current head researcher with approval from 05 Command.
Description: SCP-XXXX appears to be an underweight adult human male of Russian descent in his early twenties, standing at approximately 1.9 meters tall and weighing 596.6 kg, and possessing close-cut dark hair. Upon physical inspection, the entity's only anomalous qualities appear to be dark red iris pigmentation, as well as reversed pigmentation of the sclera and pupil2. However, the main anomalous property of SCP-XXXX is its ability to mold and shape its own body structure and function, both when willed and subconsciously. While it is not capable of producing new mass on its own, SCP-XXXX can "absorb" biological material to increase his current mass; however, absorbed mass will not change the appearance of SCP-XXXX, despite the entity being weighed by Foundation and the measurements obtained indicating that it has gained mass consistent with the mass of the biological matter it has absorbed. SCP-XXXX also possesses a secondary anomalous quality or ability that completely prevents any observation or monitoring of itself by any means other than the human eye. This ability thus far has made tracking by any electronic means impossible, including satellite, GPS, drone, CCTV monitoring, and monitoring of social media. This inability to be perceived by electronic means is what has led to current containment procedures.
Addendum 1: Discovery Log
SCP-XXXX was discovered in 1917, during a Foundation-operated raid on a Sarkic place of worship, which utilized the chaos of the Summer Campaign in Romania as a cover. A strike team formed from 6 members of Mobile Task Force Beta-77 ("Maz Hatters") was sent in to deal with what the Foundation had been informed was a Sarkic cult attempting create a possible high-threat biological anomaly, or had already completed such.3Upon entry to the bunker in which the Sarkites were residing, the MTF began encountering dismembered and disembowled corpses of the cultists, and a single still-living individual, who perished shortly after the MTF discovered them and was unable to provide information due to massive trauma to the throat. After informing command of a possible hostile entity, the MTF was given clearance to proceed further into the structure. The members of MTF Beta-77 continued to discover more corpses as they proceeded down four additional floors, which became noticeably more torn apart as they advanced. No survivors, aside from the one found close to the entrance, were discovered. Upon reaching the fifth and final level of the bunker, the MTF discovered what was presumed to be the leader of the Sarkic Cultists engaged in combat with another entity, now known as SCP-XXXX. While SCP-XXXX appeared exactly as desribed above, the supposed leader of the Sarkites had the appearance of an enormous slug, although it was significantly longer r
Addendum 2: Note from Dr. Mostana
Addendum 3: Termination Attempts (x4)
Addendum 4: Interview Logs
Interviewed: SCP-XXXX
Interviewer: Dr. Mostana
Foreword: Subject approached Dr. Mostana approximately 7 weeks after the final termination attempt while he was leaving his home in [black this out], requesting to speak to a Foundation doctor. The spontaneity of the interview appears to be the reason behind Dr. Mostana's unprofessional behavior later in the interview. The interview was recorded by a listening device placed on Dr. Mostana's personal vehicle, which was there for research on an unrelated SCP object.
<Begin Log, 05:42 AM MST>
SCP-XXXX: Hello there, doctor
Dr. Mostana: Hello. Can I help you?
SCP-XXXX: As a matter of fact, you can. Are you familiar with the SCP Foundation?
Dr. Mostana: Can't say that I am. Who are they?
SCP-XXXX: Doctor, if you think you can fool me, you are sorely mistaken. I am formally requesting an interview to be administered with SCP-XXXX immediately. If you weren't already aware, that'd be me.
Dr. Mostana Well, guess the jig's up then. If you would be so kind as to come with me to Site-SCP-XXXX No, I think I'm fine here, and I'm thinking you are too. Right, doctor? Also, who says that anymore?
Dr. Mostana I'm sorry?
SCP-XXXX Who says "The jig is up"? Like, seriously, who says that?
Dr. Mostana sighs audibly
Dr. Mostana Very well. Please, have a seat.
SCP-XXXX Thank you, doctor.
Dr. Mostana Now, why are you here?
SCP-XXXX I figured you and yours would have questions about me, and I was feeling generous. So, here I am
Dr. Mostana Well then…I must say, a surprise, but a pleasant one. So, to start, who are you? Are or were you human, or are you another entity entirely?
[Repeat as necessary]<End Log, [optional time info]>
Closing Statement: [Small summary and passage on what transpired afterward]
Addendum 5: Partial List of Observed Mutations
Addendum 6: Note from Dr. Mostana
Addendum 7: Miscellaneous Documentation
Addendum 8: Notice from Dr. Buckman, Current Head Researcher of SCP-XXXX
He was originally from a village of Sarkites, the village of Bumfuck, Middle-of-Nowhere, Siberia (not the actual name, that's how he describes it). He was selected by a visiting Karcist (possibly Grand Karcist Ion) to become a prophet of Yaldboth, and accepted the "blessing" of the Karcist due to pressure from the village elders, despite his reluctance. He soon became enthralled with his new abilities, and began to work under the Karcist as a personal assassin, taking care of "problems", such as influential Mekhanites or Daevite leaders. He wasn't aware of the Karcist's activites beyond when he called for him to give him a new target. He went to speak with the Karcist one day, hoping to ask for an increase to his power or additional abilities, when he found the Karcist experimenting on other people with his own abilities, transforming them into monstrous beings of flesh of bone, twisted monstrosities. He ran away, never returning, and vowed to never again participate in any Sarkic activities. He now loathes his abilities, and has been around for countless centuries. He has given many conflicting dates as to his birth, and has stated that he simply "wants to fuck with you all a little bit" to interviewing Foundation staff
His movements have been becoming increasingly erratic, and he is often seen spending extended amounts of time nearby known Sarkic hubs. He then proceeds to go missing for an extended period of time before reappearing in or nearby the original area, with any Sarkites that have visited the location he was staking out being found killed in various ways or disappearing entirely, often in their homes, with no evidence of forced entry, and few displaying signs of a struggle. The Foundation has thus far been unsuccessful in locating him during these periods of absence, and has not been able to prevent the deaths of any of the Sarkites due to various circumstances.
