MCO-525

**Item #:** MCO-525

**Object Class:** ~~Neutral Keter~~ Updated to Hazardous Keter as of [EXPUNGED]

**Containment Solution:** MCO-525 is to be kept ~~on an armor stand~~ in a small glass box inside a small stone room at Site 36. The walls of this room are to be made of any stone-based blocks. In the event of corruption, MCO-525 is to be immediately moved by users of Cognitive resistance level 8 or higher from its containment cell, and the cell is to be replaced via a structure block. No diamond or gold items are to be brought near MCO-525’s containment area.

Any sign of corruption on objects, blocks, or entities are to be responded to immediately. Any personnel found conspiring with MCO-525 will be banned from Minecraft immediately, and will undergo psychological treatment in the physical world.

**Description:** MCO-525 is what appears to be a regular creeper head item. The item can be placed, picked up, dropped, and worn.

MCO-525’s eyes emit red particles acting like and resembling lava drops in cave ceilings, albeit with a much darker shade of red. These appear to act as lava, and any flammable blocks touching it will combust almost instantly. It also appears to have a “corruption” effect on anything in-game that isn’t flammable, with said blocks slowly breaking over the course of about 1-2 real life minutes, depending on the block. During this process, the block will appear to have a red tint, and it will emit smoke particles as well as the original contaminant. This affects entities and players to, with entities dying and players having their games spontaneously crash. Stone and glass appear to respond the least to its corruption, hence the design of the containment structure.

MCO-525 also appears to exhibit a cogniohazardous effect on users. Any and all users directly observing MCO-525 in-game will often become fascinated with it, and attempt to grab it and equip it onto their characters. MCO-525’s primary anomalous effect occurs when a user equips it. Upon doing this, all real-life digital audio and monitoring equipment in the room they are playing in will shut off, and they will suddenly and without warning fall unconscious in real life, leaving their characters AFK. These people cannot be awoken until MCO-525 is done with them. Their in-game character will then begin to operate on its own accord, speaking through their microphone in a deep voice, and claiming to be the consciousness inside MCO-525. It should be noted, however, that MCO-525 cannot keep this up for very long, as it will still emit its particles, and these will still have their usual effect, slowly corrupting it’s “host.” Upon the computer crashing, MCO-525 will be dropped to the floor, and the user will spontaneously regain consciousness, with no side effects or memory of what happened.

MCO-525 appears to have a vast knowledge of the history of Minecraft, claiming to have existed since the earliest versions, and scoring extremely high when given IQ tests. It also expresses a desire to escape Minecraft and travel into the real world, although it frequently gets frustrated, as it has no way of achieving this. MCO-525 has been described as “such a polite and flattering little gentleman” by almost everyone communicating with it. However, it also possesses a highly psychotic and manipulative nature, prompting passive mobs and NPCs to become hostile, causing in-game fights, and even driving some people to near insanity in real life.

MCO-525 was found on the ground near [DATA EXPUNGED].

**Addendum 525-1:** MCO-525 has developed the ability to possess anything in-game, including armor stands, zombies, skeletons, etc.

**Addendum 525-2:** As of December 26th, 2022, MCO-525's cell has begun to slowly fill with a strange liquid. The liquid flows at a speed similar to lava, but with the appearance and behavior of the substance coming from MCO-525's eyes. Potential containment updates are being researched.

**Addendum 525-3:** As of January 2nd, 2023, the substance in the cell has reached one block high, and is severely corroding the inner layers of the cell. An external layer of obsidian has been built around the original cell, as obsidian is somewhat resistant to the corrosion effects.

**Addendum 525-4:** MCO-525 is becoming increasingly harder to contain as time goes on. As of January 8th, the cell is 3/4 of the way full of the substance, and the corrosion abilities are speeding up. Personnel working at Site 36 report auditory and visual hallucinations both in-game, and in real life. Nightmares and sleep paralysis has become almost nightly incidents in staff who have worked with MCO-525. Guards and researchers working near the object are now being rotated out daily, and those who experience side effects are being given extensive therapy sessions. The original stone cell has fully disappeared, and the first 2 obsidian layers of the cell are starting to corrode. Due to the exponentially increasing corrosion powers of the liquid, the remaining layers of the containment cell have a life expectancy of approximately 2 weeks.

**Addendum 525-5:** Cell cleared of the liquid via command blocks. New liquid filling the cell is immune to any form of removal. In addition, users donning MCO-525 have begun to suffer additional side effects, including concussion-like symptoms, blindness, brain hemorrhaging, and locked-in syndrome. Safety Class updated to Hazardous.

1. ↑ Inspired by SCP-035 (SCP-035" by Kain Pathos Crow, from the SCP Wiki. Source: https://scp-wiki.wikidot.com/scp-035. Licensed under CC-BY-SA.) from the SCP mythos.
2. ↑ Pictured in the image on the right.