Reclassified as Safe by authority of Dr. ██████
Object Class: Keter Safe
Special Containment Procedures: Due to the size and nature of SCP-XXXX, it is to be contained on-site in facility XXXX, which was specially constructed for this purpose. Facility XXXX is surrounded by a 3m tall barbed wire electric fence, with automated sentry gun turrets spaced every 12m . Access to the facility must be approved by Dr. ██████ or personnel with 05 clearance. All personnel serving at facility XXXX must be replaced in 48 hour shifts, and only allowed to return after spending at least 48 hours outside of the affected zone.
Instances of SCP-XXXX-1 may not be removed from SCP-XXXX unless authorized by Dr. ██████. If any suspected instances of SCP-XXXX-1 are discovered outside of the structure, they are to be immediately returned to the interior of SCP-XXXX, and may only be removed again after 6 hours have passed.
All flora and fauna in the affected area is to be immediately incinerated. A supply of napalm and ground salts is to be maintained at █████ ████ Airfield to curb attempts by SCP-XXXX to increase its area of effect.
Description: SCP-XXXX is an ancient limestone pyramid, built in the style of the [REDACTED] culture of South America. It is located at coordinates ██°██'██"S ██°██'██"W, within the nation of Peru. The height of the structure is ███m, and it's total volume exceeds ██████m3. Radiometric dating indicates its age as being in excess of █████ years (significantly predating the arrival of humans in the Americas).
The structure outwardly displays no anomalous properties. When encountered, it was overgrown with native flora (since incinerated). An entrance is located at ground level on the north side. This leads to an interior corridor lined on both sides by 8 small rooms. After █ meters, the corridor slopes downwards, opening into a large chamber which has been termed the "Treasure Room". When a sapient being observes the inside of this room (either personally or remotely, see experiment log XXXX-3j), one or more instances of SCP-XXXX-1 will manifest. These entities will take the form of anything the observer considers to be valuable, leading to the natural inclination to obtain them (no memetic or compulsory effects have been observed). SCP-XXXX-1 is always something that the subject is familiar with or has previously conceived of, and displays all of the properties of said entity. Instances of SCP-XXXX-1 will continue to be generated every time a new observer perceived the Treasure Room, until there is less than ██m3 of free space. If SCP-XXXX-1 is inside of the pyramid at precisely 6 hours after it first appeared, it will disappear. This process is unobservable by all known recording equipment.
If SCP-XXXX-1 is retained outside of the pyramid once 6 hours have passed, it will rapidly decay into a viscous, black liquid designated SCP-XXXX-2. Due to the ephemeral nature of this substance, analysis has proven impossible. SCP-XXXX-2 will disappear if prevented from reaching any topsoil, rocks, or outdoor plants. If the liquid reaches the ground, it will be absorbed, leaving a faint black stain. Chemical analysis of soil samples affected by SCP-XXXX-2 reveals higher concentrations of ██████ acid, as well as [DATA EXPUNGED].
Prolonged exposure to land affected by SCP-XXXX-2 leads to alteration in mental state and physical mutations. Symptoms of exposure initially include heightened aggressive tendencies, degradation of reasoning abilities among higher mammals, and indifference to pain and physical injury. The higher the quantity of SCP-XXXX-2 the land has been exposed to, the faster and more extreme the transformation. Physical mutations observed include mundane flora developing ambulatory tendrils coated with poisonous thorns, herbivorous fauna manifesting claws and teeth characteristic of carnivores, and already carnivorous fauna displaying instances of [REDACTED]. Mutated organisms will generally not attack each other, and have shown evidence of cooperation and a type of group intelligence in order to efficiently eliminate intruders.
When first discovered, the infected area was approximately 3.4km in radius, but has since dropped to 3.35km after containment procedures were implemented to prevent the spread of SCP-XXXX-2. Projections indicate that if the land is not subjected to any more SCP-XXXX-2, the affected area will completely disappear by the year 20██. Infected area is now approximately 3.6km in radius and slowly shrinking. See Incident Report XXXX-A.
Partial test log:
Incident Report XXXX-A