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    2,054,198 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 25 Oct 2026.636,163 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 25 Oct 2026.269,438 projects gradedProjects with a letter from A to F. Counted on 25 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Mystelium

    Mod

    Add a biome, tools, armor, structure, achievements and more

    E33/ 100
    • OverviewE
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.21.4
    • ModpacksIn 1
    • ReleasesLatest Mar 2025

    Download

    Mystelium V1.19.6.jar

    Released 15 Mar 2025 · 88.7 KB

    Passed: our checks found nothing harmful in this file.

    A newer beta from 20 Mar 2025 is in Releases.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade E

    How grades work

    Strengths

    • Security checks passed

    Points lost

    • No release in 19 months−20 points
    • Releases replaced within 3 days to fix a problem−7 points
    • No source code link−7 points
    • Releases in only 4 of the last 24 months−3 points
    • Under 5 million downloads−2 points
    All 11 criteria

    • Maintenance

      15 points lost12 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.19 months ago (22 Mar 2025) 0 / 12
      Supports 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.1.21.4 on NeoForge, 1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 1.21.1. Latest Minecraft: 26.3. 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 4 of the last 24 months 3 / 6

    • Stability

      7 points lost5 / 12
      Removed 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.Not measured yet.
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.24 of its 56 releases in 2 years needed a quick fix (43%) See the 24 releases0 / 7
      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 / 5

    • Transparency

      7 points lost0 / 7
      Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.Does not apply. CurseForge links are not in our data.

    • Popularity

      2 points lost2 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.5,283 2 / 4

    • Track record

      8 points lost0 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.23 months, 102 releases 0 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 3 latest files for recent Minecraft versions. See Security
    Total33 / 100

    19.2 of the 58 points that apply = 33 out of 100. The points above are rounded to whole numbers.

    Images

    • MYSTELIUM LOGO
    • Mystelium creative inventory
    • Mystelium planks
    • Mystelium shovel
    • Mystelium hoe
    • Mystelium ingot
    • Mystelium leaves
    • Mystelium nugget
    • Mystelium armor
    • Mystelium ore
    • Mystelium wood
    • Mystelium axe
    • Mystelium sword
    • Mystelium pickaxe

    In-game changes

    Does not change the game's code directly.

    Adds 5 blocks, 12 items, 1 biome, 1 structure, 26 recipes and 3 advancements.

    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.

    Details

    Creator
    XAYWOX
    License
    Not known
    Downloads
    5.3K
    Created
    10 Nov 2024
    Official page
    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 · All 3 latest files checked, last on 19 Oct 2026
    • 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. All 3 are for recent versions. 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
    • 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 · All 3 files read
    • 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 all 3 files, for recent Minecraft versions. See each file in Releases

    AI

    No sign that AI was used to make it

    We looked for AI tools in its texts, files and images 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 · 4 places read
    • 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.
      Not on Modrinth.
    • Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.
      Nothing found
      40 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 found
      19 images 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 file
      27 code files read

    Compatibility

    See all 102 files
    NeoForge
    Forge
    1.201.2126.126.3

    Point at or tap a version to see its loaders.

    RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.Nothing
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    IncludesProjects packed inside its files.Nothing
    Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.Its newest file is for 1.21.4. It has no file for the 6 newer Minecraft versions. It also supports 1.21.1, a version many recently updated mods still support.

    Modpacks using this project

    Find modpacks with it

    Modpacks that include Mystelium in at least one of their versions, most downloaded first.

    ModpackDownloadsLast version with it
    [FORGED] Mystic And Beyond301 downloadslast version with it 18 Feb 2025

    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.

    MinecraftLoaderVersionSecuritySendsRequires
    1.21.4·NeoForge1.19.61.19.6 · Mystelium V1.19.6.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·NeoForge1.19.61.19.6 · Mystelium V1.19.6.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.19.61.19.6 · Mystelium V1.19.6.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    102 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1·Forge2-pre-release-92-pre-release-9 · Mystelium V2 pre-release 9.jarBeta·22 Mar 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Beta · 1.5 MB
    1.20.1·Forge2-pre-release-82-pre-release-8 · Mystelium V2 pre-release 8.jarBeta·21 Mar 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Beta · 1.5 MB
    1.21.1·NeoForge2-pre-release-72-pre-release-7 · Mystelium V2 pre-release 7.jarBeta·20 Mar 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Beta · 1.5 MB
    1.20.1·Forge2-pre-release-72-pre-release-7 · Mystelium V2 pre-release 7.jarBeta·20 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 1.5 MB
    1.21.4·NeoForge2-pre-release-62-pre-release-6 · Mystelium V2 pre-release 6.jarBeta·20 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 1.5 MB
    1.21.1·NeoForge2-pre-release-62-pre-release-6 · Mystelium V2 pre-release 6.jarBeta·20 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 1.5 MB
    1.20.1·Forge2-pre-release-62-pre-release-6 · Mystelium V2 pre-release 6.jarBeta·20 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 1.5 MB
    1.21.4·NeoForge2-pre-release-52-pre-release-5 · Mystelium V2 pre-release 5.jarBeta·19 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 149.1 KB
    1.21.1·NeoForge2-pre-release-52-pre-release-5 · Mystelium V2 pre-release 5.jarBeta·19 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 145.3 KB
    1.20.1·Forge2-pre-release-52-pre-release-5 · Mystelium V2 pre-release 5.jarBeta·19 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 149.2 KB
    1.21.4·NeoForge2-pre-release-42-pre-release-4 · Mystelium V2 pre-release 4.jarBeta·18 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 147.4 KB
    1.21.1·NeoForge2-pre-release-42-pre-release-4 · Mystelium V2 pre-release 4.jarBeta·18 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 143.8 KB
    1.20.1·Forge2-pre-release-42-pre-release-4 · Mystelium V2 pre-release 4.jarBeta·18 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 147.6 KB
    1.21.4·NeoForge2-pre-release-32-pre-release-3 · Mystelium V2 pre release 3.jarBeta·17 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 138.6 KB
    1.21.1·NeoForge2-pre-release-32-pre-release-3 · Mystelium V2 pre release 3.jarBeta·17 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 134.9 KB
    1.20.1·Forge2-pre-release-32-pre-release-3 · Mystelium V2 pre release 3.jarBeta·17 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 138.5 KB
    1.20.1·Forge2-pre-release-22-pre-release-2 · Mystelium 2 pre-release 2.jarBeta·16 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 119.4 KB
    1.21.1·NeoForge2-pre-release-22-pre-release-2 · Mystelium V2 pre-release 2.jarBeta·16 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 116.0 KB
    1.21.4·NeoForge2-pre-release-22-pre-release-2 · Mystelium V2 pre-release 2.jarBeta·16 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 119.7 KB
    1.21.4·NeoForge2-pre-release-12-pre-release-1 · Mystelium V2 pre-release 1.jarBeta·15 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 119.7 KB
    1 to 20 of 102123456

    Quick fixes

    In the last 2 years, 24 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 7 points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.24

    • Mystelium V2 pre-release 821 Mar 2025…2 bugs with the world arrival message have been fixed [Removed] An unnecessary Mystelium shard…
    • Mystelium V2 pre-release 216 Mar 2025…Mystelium Eternal Night [Bugfix] Fixed a bug with Mystelium nuggets
    • Mystelium V1.19.5 and 1 other release14 Mar 2025…texture changes [Bugfix] 4 bug fixes Translation fixes
    • Mystelium V1.19.413 Mar 2025…Achievement name changes [Bugfix] Fixed a bug in Mystelium biome generation with version 1.20.1…
    • Mystelium V1.1911 Mar 2025[Bugfix] Bug fix with translation [Changes]…
    • Mystelium V1.19.111 Mar 2025Bug fix texture Mystelium log and Mystelium planks
    • Mystelium V1.18.110 Mar 2025…Deepslate Mystelium ore. [Bugfix] Fixed a bug with the Spanish translation.
    • Mystelium V1.175 Mar 2025Bug fix with translation Fxed bug with block sound…
    • Mystelium V1.16.13 Mar 2025fix a bug on the Spanish translation
    • Mystelium V1.162 Mar 2025Fixed an issue with Spanish translation
    • Mystelium V1.15.228 Feb 2025…Added Canadian and Spanish translation Fixed issues with French and English translation
    • Mystelium V1.14.122 Feb 2025-Fixed 2 bugs with leaves -New version of MCreator -Small…
    • Mystelium V1.11.117 Dec 2024Bug fixes
    • Mystelium V1.1027 Nov 2024bug fixes add mystelium house
    • Mystelium V1.10.127 Nov 2024bug fixes
    • Mystelium V1.10.227 Nov 2024bug fixes mystelium's eternal night color changes
    • Mystelium V1.9.224 Nov 2024Bug fixes.
    • Mystelium V1.922 Nov 2024…biome spawn change Mystelium nugget added bug fixes better mod item names better mod item locations…
    • Mystelium V1.7.514 Nov 2024bug fix for mystelium leaves.
    • Mystelium V1.814 Nov 2024Fixed texture bug related to Mystelium wood. Added…
    • Mystelium V1.713 Nov 2024fixed bug related to mystelium biome.
    • Mystelium V1.612 Nov 2024…new tools: mystelium tools + crafts fixed name bugs
    • Mystelium V1.511 Nov 2024fixed bug with enchanting mystelium ingots changed…