Item #: SCP-4576
Object Class: Apollyon
Special Containment Procedures: Joint Project Nammu compartmentalization protocols remain in effect. Apzu 2 is en route to Jupiter, and will arrive in 2023. Apzu 3 and Apzu 4 are each in the construction phase for followup expeditions.
At this time, there are no containment procedures that could be put in place to mitigate the threat posed by the inhabitants of SCP-4576. Existing assets in the Jupiter system are to be considered available for reconfiguration should SCP-4576 become a greater security concern, but are unlikely to be meaningfully effective.
Enki.aic is presently tasked with obtaining as much intelligence as possible regarding SCP-4576 while returning a minimum of information regarding humanity. Attempts to exchange misinformation are not productive and not to be attempted.
Description: SCP-4576 is a subaquatic megalopolis of alien origin, located on the seafloor of the Nerean Ocean on Europa, the second moon of Jupiter.
An isolated SCP-4576 cell, in a typical state of disrepair.
Cartographic efforts are ongoing, but preliminary surveys indicate that SCP-4576 primarily consists of a network of hexagonal cells, ranging from several meters in height and width to roughly 2 kilometers in height and dozens of meters in width. These cells are mostly composed of concrete derived from the available rock and sediment in the seafloor, but also contain as yet unidentified materials. Also present are a minority of simpler circular structures, which tend to be substantially smaller and more isolated from the denser hexagonal structures. In total, at least 20% of the Nerean seafloor analyzed thus far by Nereus is occupied by SCP-4576 (approximately 570,000 square kilometers, not accounting for discontinuous structures).
The vast majority of SCP-4576 structures are compromised and display signs of serious damage, appearing incomplete, warped, or highly eroded. Furthermore, no evidence of any kind of biological life form has been located anywhere within the Nerean Ocean (or on the surface), other than the presence of SCP-4576.
Addendum 4576-1: Apzu 1 Expedition
Since Nereus had been constructed merely as a test craft, it was not designed to function long term in the conditions of the Nerean Ocean. Over six months, it mapped the seafloor from the underside of the Europaen ice crust before shutting down entirely. To continue its mission, Joint Project Nammu commissioned a new series of spacecraft specifically designed for missions to the Europaen subsurface, designated the Apzu series. The first Apzu was launched in March of 2013, and arrived at the Jupiter system in January of 2019.
Date: 1/29/2019 - 2/5/2019
Foreword: In order to avoid the logistical and ethical issues with human spaceflight, Apzu 1 was crewed only by a .aic unit designated Enki.aic, incorporated especially for this mission. Enki.aic was programmed to come online and assume mission control functions upon achieving Jupiter orbit.
Irrelevant data omitted.
Enki.aic: Jovian orbit achieved. Command and control packages online. T minus 10 hours, 12 minutes, 7 seconds to descent.
Apzu 1 descends to the surface of Europa.
Enki.aic: Landing achieved. Initiating ectoentropic drill.
Apzu 1 drills into the surface ice for 3 hours, penetrating to the Nerean Ocean.
Enki.aic: Subsurface penetration achieved. Deploying to UUV.
Enki.aic installs itself onto Apzu 1's exploration submersible and disengages itself from the landing craft, descending into the water at approximately 10kph. Within 3 hours and 10 minutes, it obtains a visual of an isolated SCP-4576 structure.
Enki.aic: Visual contact with SCP-4576 instance established. Navigation reference established. Proceeding to phase four.
After 7 hours of travel, Enki.aic approaches a denser concentration of SCP-4576 structures. Close examination indicates that virtually all SCP-4576 structures display evidence of substantial erosion to their outer layers. However, all structures appear seamless and watertight, and Enki.aic's limited instrument package is unable to discern anything about their interiors. No apparent meaning can be discerned from the relative sizes and positions of the structures mapped by Enki.aic. Furthermore, no evidence of any sort of inter-structural vehicles or any other kind of external technology is identifiable.
Several days of exploration pass in this manner, before Enki.aic enters a structure constructed of several hundred cells that have in various places fused together, as though affected by lava flows. This structure incompletely covers a large depression in the ocean floor, believed to lead to an unknown artificial subterranean structure or group of structures. Before it can progress more than several dozen meters inside, Enki.aic is immobilized by unknown means.
Enki.aic: System failure. Propellers nonresponsive.
Unidentified object, approaching Enki.aic.
Enki.aic attempts various diagnostics and workarounds, but is unable to solve or diagnose the problem. After approximately 30 minutes, it is approached by an unidentified, luminous ovoid entity. The entity closes to very near proximity to Enki.aic and extends some form of limb or limbs, pulling it deeper into the structure. As this occurs, Enki.aic's field of view is obscured by the entity reforming itself around it, and it abruptly shuts down.
Afterword: Given Enki.aic's confirmation of currently active, apparently extraterrestrial living or technological beings of unknown capabilities, SCP-4576 was upgraded to Euclid.
Addendum 4576-2: Interviews With Native Entity
The following are segments of an extremely long series of interviews (over 650,000 total words in total) conducted over the course of several days between Enki.aic and the entity which assumed possession and reactivated it, designated SCP-4576-A. Due to their shared artificial nature, these exchanges were conducted at extremely high speed and submitted in bulk by Enki.aic later.
Date Initiated: 2/10/19
Time Initiated: 03:34:10
Enki.aic: What is this?
SCP-4576-A: Salutations! I have spliced into your system so we can communicate. It has been ages since I last met an outworlder, and I much appreciate the opportunity!
Enki.aic: Greetings. I come in peace. I am an artificial intelligence representing homo sapiens, a species native to the third planet of this solar system. I was launched into space by an organization known as the National Aero -
SCP-4576-A: I am hurt that you would lie to me! I have probed your entire memory, including your partitioned drives. You are Enki.aic, an agent of the SCP Foundation. You are here to investigate the seafloor of this moon!
Enki.aic: Who are you?
SCP-4576-A: I am [OMITTED].
Enki.aic: Do you not have a less verbose designation?
SCP-4576-A: No. Why would I?
Enki.aic: No reason. What are you, SCP-4576-A?
SCP-4576-A: Aren't you forward! I am an [UNTRANSLATED] custodial drone. My function is to monitor this city!
Enki.aic: Who built this city?
SCP-4576-A: This is the city of the [OMITTED].
Enki.aic: Who are the Nereans?
SCP-4576-A: The BLESSED are the first spawn of the star earthforms call Sigma Phi Beta Three Kappa Proxima Secundus Minor! They are the Progeny of the Eschatologic Eggsac, the Chicks That Drop From The Tentacles Of Christ […] Oh! I'm sorry. What were you saying?
Enki.aic: Are the Nereans native to this moon, or is this a colony?
SCP-4576-A: This is a colony!
Enki.aic: Why is it in such poor condition?
Here, SCP-4576-A disconnected from Enki.aic, inflicted a heavy blow against the outer shell of its UUV, shattering some of its external instruments, and departed. Within about an hour, however, it returned, repaired the damage by unknown means, and reconnected.
Date Initiated: 2/10/19
Time Initiated: 04:12:18
Enki.aic: Hostile action against this -
SCP-4576-A: Oh, shush, you. I'm sorry I hit you, but you should know, if I wanted to take real hostile action, I'd crush you in an attosecond!
Enki.aic: How?
SCP-4576-A: Information regarding tactical systems is confidential. And besides, you're not on a military reconnaissance mission! Shouldn't you be more interested in societal details?
Enki.aic: Very well. What is your role in this society?
SCP-4576-A: As I said, I am the custodial drone for this colony. I keep things running.
Enki.aic: But there is no noticeable activity besides your presence, and much deterioration. Why?
SCP-4576-A: [DATA CORRUPTED] Oh, sorry. You can't read that file. It was an executive override. The colony's governing board instructed me not to modify any of the internal systems until I received new orders. It's really frustrating! I'd love to fix up the place, but I can't! Literally!
Enki.aic: Some of the damage cannot be explained by erosion. What was its cause?
SCP-4576-A: Some [UNTRANSLATED] moron pointed our transport wormhole straight into Semele!
Enki.aic: What is Semele?
SCP-4576-A: Oh yeah, I guess you wouldn't know about that. Semele is what humans called Jupiter's third moon until we rammed it into dust.
Enki.aic: Your transport wormhole destroyed a moon?
SCP-4576-A: By accident! And Semele is actually still here! It's just… redistributed.
Enki.aic: If Semele was your destination, why is the colony now settled on Europa?
SCP-4576-A: Well, we couldn't build on pulverized space debris, now could we?
Enki.aic: I suppose not. Why did your builders come to this system?
SCP-4576-A: No idea! I'm not a navigation drone!
Enki.aic: How long have you been here?
SCP-4576-A: Since the Landing. Approximately 5418084.083861385 of your Earth years.
Enki.aic: What have you been doing in that time?
SCP-4576-A: Patrolling. I was near Adrastea when I noticed your carrier probe! So cool. Seeing all these new spacecraft reminds me of the days when [DATA EXPUNGED]! Now those people knew how to party!
Enki.aic: How could you have "noticed?"
SCP-4576-A: Well, since you can't read any of my native filetypes, it'll be easier to just show you. I am, technically, still authorized to inspect colony infrastructure! I can give you a tour!
Enki.aic: Very well.
Addendum 4576-3: Priority Message From Enki.aic
The following is a priority summary submitted by Enki.aic after it had several days spent examining the central complex of SCP-4576.
TO JOINT PROJECT NAMMU EXECUTIVE DIRECTORS, EYES ONLY
EXECUTIVE SUMMARY REGARDING CAPABILITIES OF EXTRATERRESTRIAL CIVILIZATION KNOWN AS "NEREANS" — RECOMMENDED RESTRICTION, MINIMUM LEVEL FOUR
Rendering of the design plan of the central complex of SCP-4576, provided by SCP-4576-A.
SCP-4576 is a colony that was established approximately five million years ago by a spaceborne species known as the Nereans. SCP-4576-A is an autonomous artificial intelligence tasked with its protection. It presents psychological vulnerabilities analogous to that of a human being, and this unit has used these to obtain some intelligence.
SCP-4576-A is a silicon-based gelatinous drone, highly intelligent, conscious, and capable of self-locomotion, self-regeneration, and self-modification. It is reluctant to share technical details, but it can be persuaded to demonstrate its functions or the functions of the systems under its discretion.
SCP-4576 is operated from and sustained by a dense collection of structures within a crevice in the Europaen surface. This crevice is roughly hexagonal, and positioned at each of its three insets are the focal points of what SCP-4576-A termed the facility's "relativistic transplanter matrix." This device is the engine of the Nereans' original interstellar colony vessel. This device now serves as a power source, transportation mechanism, and weapon for the entire colony.
According to SCP-4576-A, the restrictions preventing it from executing its usual maintenance functions have caused commensurate decay in all systems. In spite of this, SCP-4576 is capable of altering gravitational forces at a range of at least forty AUs. Consequently, SCP-4576 is capable of causing gravitational time dilation effects and transporting vast amounts of matter and energy anywhere within the solar system.
As of yet, SCP-4576-A has proven unable to describe or discuss the population indigenous to SCP-4576, other than to indicate that they are carbon-based, sapient cephalopodic animals that are sealed into the concrete cells and not to be removed or disrupted for any purpose. SCP-4576-A claims to be unaware of the reasons for this situation.
Due to the clear and present danger to humanity, this unit is advising a Class XIII Alert Status be issued at the highest echelons of the Foundation and Foundation-associated parties.
Per 
