SCP-2521, ●●|●●●●●|●●|●
ModA mysterious black figure that appears when its own number is written or spoken.
Why gradeC
How grades workStrengths
Points lost
- No source code link−7 points
- Releases in only 2 of the last 24 months−5 points
- No release in 4 months−3 points
- No public issue tracker−3 points
- Under 5 million downloads−1 point
All 11 criteria
Maintenance
7 points lost20 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4 months ago (10 Jun 2026) 10 / 12Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.20.1 on Forge. 77% of the 516 popular Forge mods updated in the last 6 months also have files for 1.20.1. Latest Minecraft: 26.3. 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 2 of the last 24 months 1 / 6Stability
Full points15 / 15Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.3 of the 35 modpacks with two or more versions removed it in a later one (9%) 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5Transparency
10 points lost0 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.No link to report problems 0 / 3Popularity
1 point lost3 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.63,578 3 / 4Track record
1 point lost7 / 8AgeHow long the project has existed. It counts less when no new file came out recently.12 months, 3 releases 7 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file for recent Minecraft versions. See Security
45.1 of the 64 points that apply = 70 out of 100. The points above are rounded to whole numbers.
Images
About
SCP-2521 adds the mysterious entity from the SCP universe, a tall, pitch-black humanoid with flowing tentacles and a heart symbol on its head. Writing “2521” in chat summons it, even when the number appears in coordinates or another message. The creature moves quickly, phases through walls, and cannot be harmed; when its target is more than 15 blocks away, it teleports directly to them. When it reaches its victim, it drags them into the void and then vanishes.
Written from Modrinth . How we write it
In-game changes
Does not change the game's code directly.
Adds 2 items, 1 mob, 1 other entity and 1 sound.
Counted from the names and data files in the mod, so the list may not be complete.
Keeps all of vanilla Minecraft's textures, models and sounds.
Often used with it
See all 30Details
- Creator
- Zcoper
- License
- All rights reserved
- Downloads
- 64K
- Created
- 19 Oct 2025
- Official pages
- Modrinth , CurseForge
Security
No harmful code found
We checked its files and read their code, without running it.
Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.
How we checked
- FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.3 latest files: the newest file for each Minecraft version and loader. The answer above is about the one for a recent version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
- Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.Read without running it
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
- Looked for, not foundWe looked for these in the file and did not find them.The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.
Privacy
We found nothing it sends
We read its code without running it: it contacts no web address while you play.
Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.The code of its one file, for recent Minecraft versions. See each file in Releases
- Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.Nothing declared about crash reports, usage data or advertisements.
AI
No sign that AI was used to make it
We looked for AI tools in its texts, files, images and sounds and found none.
No sign of AI in the game
We found no AI service, AI library or AI model file in its code.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.No AI content or AI features declared.
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found3 of 9 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Nothing found
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Nothing found6 images read
- Sounds in its filesThe tags of the sound files in the files you download, where some AI music tools write their name.Nothing found3 sounds read
- Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.No AI service, AI library or AI model file33 code files read
Compatibility
See all 3 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with it| Oct 2024 | 0 |
|---|---|
| Nov 2024 | 0 |
| Dec 2024 | 0 |
| Jan 2025 | 0 |
| Feb 2025 | 0 |
| Mar 2025 | 0 |
| Apr 2025 | 0 |
| May 2025 | 0 |
| Jun 2025 | 0 |
| Jul 2025 | 0 |
| Aug 2025 | 0 |
| Sep 2025 | 0 |
| Oct 2025 | 2 |
| Nov 2025 | 6 |
| Dec 2025 | 8 |
| Jan 2026 | 11 |
| Feb 2026 | 10 |
| Mar 2026 | 7 |
| Apr 2026 | 8 |
| May 2026 | 9 |
| Jun 2026 | 5 |
| Jul 2026 | 10 |
| Aug 2026 | 7 |
| Sep 2026 | 5 |
More modpacks put it in their new versions than a year ago: 7 a month now, 0 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..
57 modpacks include SCP-2521, ●●|●●●●●|●●|● in at least one of their versions. Here are the 30 most downloaded.
SCP Reimagined8.7K downloadslast version with it 11 Jul 2026
SCP Re-Foundation2K downloadslast version with it 15 Nov 2025
Broken Minecraft [Horror]1.6K downloadslast version with it 21 Jul 2026
Zcoper's SCP (unofficial)1.5K downloadslast version with it 26 Mar 2026
The Dweller Archive1.5K downloadslast version with it 1 Oct 2026
scpsecretoperation1.3K downloadslast version with it 28 Feb 2026
All in One (SCP universe+)1.2K downloadslast version with it 17 Oct 2026
SCP Fundation Collection1.1K downloadslast version with it 3 May 2026
The Oblivion verse991 downloadslast version with it 31 Aug 2026
Project SCP (Discontinued)851 downloadslast version with it 26 Jan 2026Often in the same modpacks
Mods that modpacks often add together with SCP-2521, ●●|●●●●●|●●|●. Share: how many of the modpacks with SCP-2521, ●●|●●●●●|●●|● also have that mod.
SCP-330, Take only twoCModin 96% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-087, The StairwellCModin 96% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-1471, MalO ver1.0.0CModin 95% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-294, The Coffee MachineCModin 95% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-513, The CowbellCModin 95% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-003, Biological MotherboardCModin 93% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-049, The Plague DoctorCModin 93% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-789-J, The Butt GhostCModin 91% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-303, The DoormanCModin 91% of the modpacks with SCP-2521, ●●|●●●●●|●●|●
SCP-650, The Startling StatueCModin 91% of the modpacks with SCP-2521, ●●|●●●●●|●●|●Latest files
The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.