SCP-C420

Simplified aerial view of SCP-C420. SCP-C420 is presented in outline; Access Points A-E are marked in red.

Item #: SCP-C420

Object Class: Safe

Special Containment Procedures: With the cooperation of the Mongolian government, Site-C420 has been built above SCP-C420 and disguised as a government facility. Site-C420 conceals all access points to SCP-C420 and serves as a base of operations for all excavations and explorations of SCP-C420. Site-C420 is additionally used for the containment and study of several Safe- and Euclid-class anomalies, as well as other classified functions.

Description: SCP-C420 is a subterranean megastructure located in an uninhabited area of the Gobi desert, measuring 9.9km x 7.3km horizontally and extending 7.1km into the ground. It is an irregular network of stone tunnels surrounding SCP-C420-1, reinforced with a novel MoSiBTiC alloy¹ in lower areas. Five shafts, labeled A through E, allow SCP-C420 to be accessed from the surface.

Modern technology is insufficient to construct SCP-C420; further, there is no material or historical evidence pertaining to SCP-C420's creation. About 15% of SCP-C420 has been properly mapped; only 1.4% has been explored. SCP-C420's interior has been noted to smell strongly of peanuts, though no source for this scent has been found.

SCP-C420-1 is a massive incorporeal object composed of several hundred opaque triangles, similar to a polygon mesh used in 3D modeling. SCP-C420-1 does not interact with matter whatsoever; it can only be detected by its ability to reflect visible light. It is mostly composed of various shades of brown, though a large horizontal pentagonal section (found via Access Point E) is noted to be mostly red, with some yellow. A full digital reconstruction of SCP-C420 will likely remain incomplete for several years.

SCP-C420-1 (center) protruded 45cm above the ground at time of recovery.

SCP-C420-1 spans the entirety of SCP-C420, intersecting it at various points. It is presumed that SCP-C420 was built to facilitate access to and/or the creation of SCP-C420-1. Apart from SCP-C420-1, SCP-C420 appears to be entirely empty, save for several scattered coconut shells. Analysis has shown that these coconuts were harvested in April of 2020.²

Addendum: On 2020-07-30, a representative of Nintendo Co. contacted the Foundation regarding SCP-C420. Nintendo demonstrated awareness of SCP-C420's existence and location, referring to it as "the tomb", and requested that a team of its employees be allowed to access SCP-C420, offering 700 million yen (~6.5 million USD) as compensation. Due to ongoing difficulties in the Foundation's relationship with Nintendo, this request has been denied. Nintendo has refused to disclose its motives in this matter.

Footnotes

1. An alloy of molybdenum, silicon, and boron reinforced with titanium carbide. Variants of this alloy are used in ultrahigh temperature applications.

2. SCP-C420 itself was discovered in June of 2020.

Image sources (spoilers)

TOMB.png was created by me, using https://commons.wikimedia.org/wiki/File:Scale_kilometres_miles.svg, which is under the public domain, and https://commons.wikimedia.org/wiki/File:Simple_compass_rose.svg, which was made by Wikipedia user Howcheng as a modified version of this image by Wikipedia user Brosen. The polygonal figure was made by myself, using Donkey Kong's model from Donkey Kong 64 as a reference.

I created shallowgrave.jpg by modifying https://commons.wikimedia.org/wiki/File:The_Gobi_Desert,_Southeastern_Mongolia_02.JPG, which was created by Thomas D. Fischer.