Per 
SCP-XXXX-A
Item #: SCP-XXXX
Object Class: Euclid
Special Containment Procedures:
using a remote-controlled mechanical arm installed in the containment cell, routinely provide an assertion of elements found in the puddle (except for the unidentified ones) to the SCP-XXXX instances for them to replenish the Puddle
don't touch the puddle
never look at the puddle
don't mention the puddle while near 50 meters of the containment cell
Description:
SCP-XXXX refers to a population of symbiotic organisms of extraterrestrial origin. SCP-XXXX instances are fully sentient and significantly more intelligent than the average human. SCP-XXXX instances are amorphous in nature, though they are capable of taking any given form, according to the situation's requirements.
SCP-XXXX-A refers to the dominant species. There are 1200 instances of SCP-XXXX-A currently contained by the Foundation. SCP-XXXX-A are sentient by themselves, despite appearing to be one single cell. The means of sentience is currently unknown1. Though SCP-XXXX-A is capable of both sentience and locomation by themselves, they aren't very adept in that state. Because of this, SCP-XXXX-A instances will form complexes with SCP-XXXX-B instances.
SCP-XXXX-B refers to the submissive species. There are between 1 quadrillion and 9 quadrillion SCP-XXXX-B instances, as the number varies according to the type of bodies needed by SCP-XXXX-A instances. SCP-XXXX-B instances do not appear to be capable of any kind of autonomous decision making, and trillions of them at a time are controlled by singular SCP-XXXX-A instances. SCP-XXXX-B insatances' main feature is high malleability, as they can take the form of anything in order to perform a task on hand that is to be solved by SCP-XXXX-A. They can also detach from and attach to body complexes at the wills of SCP-XXXX-A instances. SCP-XXXX-A l instances are located in a random, but often central area of the body mass. When SCP-XXXX-A instances are removed from the complex, the body structure made by SCP-XXXX-B will revert back to their original states if they previously were in the form of a specialized tissue (such as "blood" cells, neural cells, muscle cells), fall on the ground as a mass of organic matter and decay shortly after.
SCP-XXXX-A instances haven't been observed to age, or be altered through time.
The only proven method of termination of SCP-XXXX-A is shock-freezing the cell with liquid methane, then incinerating it with a temperature of 2500000 degrees Celcius.
Following the termination of an SCP-XXXX-A instance, a new instance of SCP-XXXX-A will emerge from SCP-XXXX-D.
SCP-XXXX-D is a "puddle" made of a bright turquoise, viscous liquid. Further testing of the liquid concluded that SCP-XXXX-D is composed of oxygen, hydrogen (both protium and tritium), silicone, carbon, aluminum, sulfur, and %1 various other elements; including neptunium, argon, zinc, and 2 superheavy elements on the Foundation's expanded periodic table2. The means of keeping all the elements at a liquid state despite the liquid being at room temperature (measured with laser thermometers) and 1 atm pressure or how the radioctive elements are kept stable is unknown.
Addendum 01:
1. Interview log with SCP-XXXX-1
Dr. Mun enters the room. On the other side of the polycarbonate window, SCP-XXXX-1 is seated. SCP-XXXX-1 is in a humanoid form, but remarkably, its head is a translucent orange serpentine form with 4 circular black eyes. Upon initial eye contact, Dr. Mun shows a slight sign of unease, however, reverts to their initial expression shortly after. Dr. Mun gets seated and activates the microphone on their end.
Dr. Mun: Good morning SCP-XXXX-1-. I have a couple of questions for you and I want you to help me find the answers to them, alright?
There is 22 seconds of silence. Dr. Mun once again shows signs of unease and starts fidgeting, showing further signs of anxiousness. When they were asked by the security staff overseeing the interview if they would like to terminate the interview, they replied in negative with a head gesture, and the interview proceeded.
SCP-XXXX-1: Who are you?
Dr. Mun: Oh, my bad. I haven't introduced myself. You can call me Dr. Mun, and I am a researcher here. I am just trying to learn some things about you, that's it really.
SCP-XXXX-1: And you… You are trying to get information by using… Speech? Really? Is this the extent of your civilization? Is this ACTUALLY all you can do? Have you people even harnessed the breath of a star?
Dr. Mun: I- I am not sure what you mean by that. can you clarify that a bit please?
SCP-XXXX-1: [unintelligible]3, you actually don't understand. And the rest had thought you would be some super capable creatures because of the fucking size of your neural mass. My fucking [unintelligible].
Dr. Mun: Oh.
Dr. Mun can be seen fidgeting even more visibly. They start lightly tapping their feet, and avoid eye contact with all 4 of SCP-XXXX-1's eyes.
SCP-XXXX-1: Hah. Fear. An emotion I haven't encountered in a long time. Millenias of life and still, there IS fear in the universe. And the one that fears is… this.
Dr. Mun: I am not afraid, SCP-XXXX-1. You are restrained behind a bulletproof wall and I have a heavily armed team of security behind me.
SCP-XXXX-1: So then, why are you secreting that liquid "Mun"? Look at my eyes, Mun. Stop bouncing your leg, Mun. Or, Mun, are you just… very, very… stressed out Mun? Look at me, Mun.
The subject's two pairs of eyes start moving and merging. Other cells around the newly formed central eye start changing color and structure. The central eye glows with a depiction of a galaxy cluster as Dr. Mun looks at it.
Dr. Mun: W- What is-
SCP-XXXX-1: Don't talk to me Mun. Listen. Use your eyes.
Dr. Mun looks concentrated, and all the expression on their face vanishes abruptly. In this seemingly emotionless state, vocalizations resembling a monotone and quiet scream start emanating from Dr. Mun, their mouth still shut. After 16 seconds, the vocalization stops and Dr. Mun is capable of speech once again.
Dr. Mun: (Visibly distressed) What the hell just happened SCP-XXXX-1? I need answers, and you are going to give them to me.
SCP-XXXX-1: Here, here… You didn't calm down much did you?
Dr. Mun: This interview will be continued at a later time.
After Dr. Mun left the interview room, they were immediately taken to the nursery and administered antidepressants to regulate their anxiety. When they returned to their normal state, they reported they were feeling much better and they requested permission for a second interview. The security staff allowed for a revisit, but this time an agent trained in cognitohazards was to accompany Dr. Mun.
Addendum 02:
2. Interview log with SCP-XXXX-1
following the last interview that was abruptly cut, Dr. Mun returns back to the interview room with an agent accompanying them this time.
//Dr. Mun gets seated and proceeds to open the microphone standing before them. After its activation, Dr. Mun lightly taps the device, presumably to check whether it has activated or not. The speakers on the holding cell on the other side replicate the tapping, and SCP-XXXX-1's attention turns towards Dr. Mun.
SCP-XXXX-1: Well hello, look who is back. Are you still nervous, Mun?
Dr. Mun: I do not intend to have any personal conversation with you. Now, if you could just kindly let me do my job, I have a few questions I need you to answer.
SCP-XXXX-1: Fıne Mun, send them.
The previously orange coloring of SCP-XXXX-1 changes to a deep, glowing purple. It is also important to note that the previous singular eye has reverted to the original state, which was two pairs of eyes on each side of the "head".
Dr. Mun: Firstly, what is your name, if you have one?
SCP-XXXX-1: [unintelligible]
Dr. Mun: It seems though my biology doesn't allow me to perceive those sound patterns. Could you choose a name from the human hearing range which you would be comfortable with?
SCP-XXXX-1: Seymour.
Dr. Mun: Seymour?
SCP-XXXX-1: Isn't that in your hearing range?
Dr. Mun: Yes, yes my bad. Now, the second question. Where are you and the others from?
SCP-XXXX-1: Not Terra.
Dr. Mun: Any specific locations or coordinates?
SCP-XXXX-1: (Subject remains silent.)
Dr. Mun: Okay, we are doing better than the last time. Now, I want to know how did you guys get here, and how did you learn to communicate?
SCP-XXXX-1: We… we just used our vessel covered in golden light? Y'all don't have that?
Dr. Mun:
SCP-XXXX-1:
Dr. Mun:
SCP-XXXX-1:
we used to have a spacefaring civilization, we tamed stars and enslaved blackholes, reality was whatever we wanted, time was nothing but a spatial dimension to traverse to us until that day. that damned day. when your fucking metal box was spotted by one of our space cleanup ships everyone lost their goddamn minds because we thought we were alone. oh, great [unintelligible] I beg of you, turn their beloved Sol into a magnificent supernova and incinerate them. I will never forget what your silly little space game caused. My kin's plasma is on your appendages. You disgust me you filthy flesh thing. You and your life juice called blood. Primitive. Unsophisticated. Repulsive.
Addendum 03:
Interview log with SCP-XXXX-2
The subject was selected for its remarkable cooperativeness and docility, however, the incident is regarded, was done with several layers of 120mm polycarbonate windows between the subject and dr Mun
Dr. Mun: Thank you for your extremely well behavior SCP-XXXX-2. I will be asking you some questions, but before we proceed, I wanted to ask you if you had any personal requests.
SCP-XXXX-2 Some super heavy water'd [sic] be nice. Thanks [sic] you.
Dr. Mun: You're welcome SCP-XXXX-2. Now I believe, we can continue as-.
A mechanical arm inserted in the subject's cell delivers a cup of tritiated water. SCP-XXXX-2 takes a humanoid form and "drinks" the water by absorbing it through its "hand" dipped in the cup. After the water was depleted, SCP-XXXX-2 rapidly changes colors for approximately 2 minutes until settling on a bright, pulsating blue, darker in color than SCP-XXXX-D. During this period, security staff stood on hold.
Addendum 04:
Experiment Log
tried to take A cells soul with scp 158 but it self destructed and reconstructed from the puddle
scp 1548
