Item #: SCP-XSMK

Object Class: Safe

Special Containment Procedures: SCP-XSMK is to be kept at Research Command-16 in a small wooden humidor, with appropriate hydration devices refilled as necessary to maintain a level of 70% +/- 2 humidity as measured by a standard hygrometer. The humidor may be stored in any standard storage room so long as it is kept within a locked cabinet or case of some kind.

Instances of SCP-XSMK-1 may not be used in testing without prior approval from two Level 4 Personnel in unrelated positions.

Let's remember, we have a very limited supply of these, and there's no reason to believe we'll get any more in the future. All further testing is hereby suspended.

—Director ███████

Description: SCP-XSMK appears to be an ordinary king size "crush-proof" pack of [REDACTED] brand class A mentholated cigarettes, produced in █████████████, ██, USA. Although the pack appears perfectly ordinary, it bears no serial number or expiry information. The cellophane wrapping bears a tax stamp from the state of ███████, USA, and indicates it was stamped in 199█. The pack shows some form of wear and tear around the corners and edges, but appears otherwise intact. At present, there is no reason to believe that the pack itself is any more or less resilient than any other pack of [REDACTED] cigarettes from the same era. Despite its advanced age (Manufacturer's guidelines state that the cigarettes should expire after 18 months) the contained cigarettes, hereafter referred to as SCP-XSMK-1, have not been described by test subjects (who typically smoke) as abnormal or unpleasant in any way.

Upon arrival at the foundation, 16 instances of SCP-XSMK-1 were present in the pack. Since then, testing has diminished this number to 9.

When an instance of SCP-XSMK-1 is lit, smoked and extinguished by a human subject, the latter event becomes a point of inflection from which an alternate timeline, SCP-XSMK-T, stems; subjects live a normal life with no apparent anomalous phenomena arising as a direct result. Upon death they will resume their life from the point of inflection, with full, intact memories of the events of the SCP-XSMK-T timeline.

As yet, there is no way to determine whether one is part of the standard SCP-XSMK-S timeline to which the subject will return after death, or the alternate SCP-XSMK-T timeline in which the subject lives until death and prior to the "reset event", other than interview or interrogation of the subject. Furthermore, during the SCP-XSMK-T timeline, additional instances of SCP-XSMK-1 exhibit no discernible anomalous effect. ETS1 does not appear to cause one to enter SCP-XSMK-T.

Testing has concluded that multiple individuals may share the same instance of SCP-XSMK-1 and will each enter a separate SCP-XSMK-T timeline which may be drastically different one from another, especially as the length of time of the respective SCP-XSMK-T instances goes on. Although actual experimentation was capped at three subjects for logistical reasons, there is no evidence to suggest that any upper limit exists outside of the effective time limit enforced as a consequence of the combustible nature of SCP-XSMK-1.

Repeated use of SCP-XSMK-1, especially in conjunction with long SCP-XSMK-T timelines, may cause mental instability, along with other pronounced psychological maladies. After use, subjects should undergo a period of supervised rest, followed by a mandatory 1 (one) month period of debriefing, psychological evaluation and abstention from further experiments with SCP-XSMK-1. As noted earlier, due to the difficulties inherent in determining on which timeline one resides, administration of Sodium Pentothal2 is authorized and highly recommended for post-experiment interviews.

SCP-XSMK came to the attention of the Foundation through the use of a routine keyword search, where two friends had posted on a blog about their "amazingly trippy" approximately 20-year hallucinations brought on by cigarettes. By the time Foundation personnel arrived on the scene, the owner of the cigarettes had smoked two more, and was incoherent. Careful administration of low-grade amnesiacs, psychotherapy and administration of Sodium Pentothal allowed for an insight into the key details that helped foster the Foundation's initial understanding of the object's properties. The original owner and his friend were given Class-A amnesiacs after the information was retrieved, and returned to their respective lives.

Addendum: It has been revealed during test subject interviews that researchers who become familiar with the nature of this phenomenon may, upon discovering they are part of the SCP-XSMK-T timeline, become extremely depressed and/or paranoid. As such, at the end of the month of debriefing and evaluation, all researchers in direct interaction with the subject or the creation of the reports, logs or associated documentation are to be administered Class B Amnesiacs, even if it is determined that the current timeline is SCP-XSMK-S.

Experiment Log LOG-XSMK-3
Experiment Log LOG-XSMK-4
Experiment Log LOG-XSMK-5

at this point I am still writing, so here's an infodump/mock writeup of the rest of the article's information

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