Per 
SCP-XXXX
Class: Keter
Containment procedures:
SCP-XXXX is to be kept in a partitioned anti-corrosive container, with internal partitions having only one dimension larger than 1.26 centimeters. No more than 2 cubic centimeters of SCP-XXXX is to be removed for testing at any one time.
Full anti-corrosive environmental protection must be worn by all personnel while in the presence of SCP-XXXX.
Instances of SCP-XXXX which are not contained must be enclosed in a double hulled, pressurized containment building with an intervening, positively pressurized atmosphere of argon. The internal building must be constructed of anti-corrosive material, and painted on the internal surface to resemble the original environment surrounding SCP-XXXX.
When the instance of SCPX begins to migrate during event SCP-XXXX-B, the atmosphere of the internal hull must be filtered using a gas filter of no larger than 10 microns, and all particulate matter is to be contained as is detailed.
Description:
SCP-XXXX is a mass of fine particulate matter which can form itself into a variety of objects through unknown means. It has limited intelligence, including the ability to perform survival-related problem-solving tasks.
When not contained, SCP-XXXX takes the form of a store, either an antique or architectural salvage store. Within this "store" are two additional forms of SCP-XXXX.
SCP-XXXX-1 is a bipedal humanoid formed of SCP-XXXX. It is independently mobile and functions, in appearance as a human of any gender and between the ages of forty and sixty. This being can interact similarly to an actual human proprietor while within or close to a manifestation of SCP-XXXX with the ability to speak in simple sentences. However, SCP-XXXX-1 is not independently sentient. If SCP-XXXX-1 moves or is moved from the primary manifestation, at a distance of six meters, SCP-XXXX-1 loses structural cohesion and reverts to SCP-XXXX.
SCP-XXXX-2 visually resembles items available for sale within the primary manifestation of SCP-XXXX. These items will tend to match the style of manifestation, whether antique or architectural salvage. However, some items will be either out of place, appear to be made out of the incorrect material, or will not function as the original item it is mimicking. Like SCP-XXXX-1, if an instance of SCP-XXXX-2 is moved more than six meters beyond the primary manifestation, it will revert to SCP-XXXX.
Not all of the mass of SCP-XXXX is converted into the building, SCP-XXXX-1 and instances of SCP-XXXX-2. Small amounts of SCP-XXXX will collect on the surfaces within the manifestation and will remain inert until one of the two events.
Event SCP-XXXX-A
During event SCP-XXXX-A, unassociated instances of SCP-XXXX become motile, with the ability to move through a normal atmosphere. The nature of SCP-XXXX’s method of locomotion is currently unknown.
SCP-XXXX will cover any surface within the main manifestation which is not a part of SCP-XXXX and, once completely enclosed, will begin to break down the object employing an unknown corrosive agent. As the surfaced is ablated, it is converted into additional SCP-XXXX until none of the foreign material remains. At this point, 75-95% of the newly formed SCP-XXXX will manifest instances of SCP-XXXX-2. The remainder will settle within the primary manifestation.
Event SCP-XXXX-B
During event SCP-XXXX-B, the entire substance of an SCP-XXXX manifestation and all instances of SCP-XXXX-1 and SCP-XXXX-2 contained within will lose cohesion and revert into a mass the same volume as the manifestation. This volume will then migrate to a new location. At this new location, a new manifestation will form. The new manifestation will include a single instance of SCP-XXXX-1 and multiple instances of SCP-XXXX-2.
