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    2,054,849 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 2026.269,417 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.

    MagnumOpus

    Mod

    Explore alchemy and primitive science in a rugged survival world.

    E29/ 100
    • OverviewE
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.12.2
    • ModpacksIn 13
    • ReleasesLatest Sep 2019

    Download

    MagnumOpus-1.12.2-0.0.40.jar Beta

    Released 18 Sep 2019 · 4.0 MB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade E

    How grades work

    Strengths

    • Security checks passed
    • Stable releases

    Points lost

    • No release in 7.1 years−26 points
    • Newest file is for 1.12.2, older than the versions mods are made for now−9 points
    • No source code link−7 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      27 points lost0 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.7.1 years ago (18 Sep 2019) 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.1.12.2 on Forge. About 9 years behind popular modding versions. Latest Minecraft: 26.3. Abandoned: no release for 7.1 years; no file for a popular modding version.0 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.No release in the last 24 months 0 / 6

    • Stability

      Full points15 / 15
      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.1 of the 10 modpacks with two or more versions removed it in a later one (10%) 10 / 10
      Quick 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 / 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

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.26,509 3 / 4

    • Track record

      8 points lost0 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.10.3 years, 4 releases 0 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files. See Security
    Total29 / 100

    17.6 of the 61 points that apply = 29 out of 100. The points above are rounded to whole numbers.

    Images

    • 2014-12-07_20.50.37
    • 2014-12-05_20.18.28
    • 2014-12-07_21.11.12
    • 2014-12-07_15.03.42
    • 2014-12-07_15.33.40

    About

    MagnumOpus is a PrimalCore add-on that blends alchemy with primitive earth science in a survival-focused world where gathering and exploration are central to progression. It adds expanded recipes for the PrimalCore cauldron, including special fluids whose crafting can depend on conditions such as the moon being visible in a particular phase; Arges pushes players downward, while Anemoi lifts them, and sneaking reverses the movement. The mod also adds moon-phase and rain detectors that emit redstone signals in suitable conditions, with moon-phase detectors varying their signal strength according to the current phase; both need a clear view of the sky. Other additions include weapons, redstone-powered Ignitors that direct vanilla fire from their top face and can be oriented to open or close a Nether portal, and spider eggs found in the world that hatch hostile spiders when disturbed. Horde spiders have biome-specific types, attack many other creatures, and leave more eggs behind.

    Written from CurseForge . How we write it

    In-game changes

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.7.10 to 1.12.2.

    Adds 223 items, 1 mob, 4 other entities, 77 recipes, 2 loot tables and 31 sounds.

    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
    An-Sar
    License
    Not known
    Downloads
    27K
    Created
    30 Jul 2014
    Official page
    CurseForge

    Security

    No harmful code found

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.7.10 to 1.12.2.

    We checked its files and read their code, without running it.

    What it can do on your computer

    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. Only in its files for Forge 1.12.2. See Privacy

    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 · Both latest files checked, last on 16 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.
      2 latest files: the newest file for each Minecraft version and loader. None is for a recent Minecraft version, so the answer above is about all of them. 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.
      Folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.7.10 to 1.12.2.

    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 · Both 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 both files, for Minecraft 1.7.10 to 1.12.2. See each file in Releases

    AI

    No sign so far that AI was used to make it

    We looked for AI tools in its description, files, images and sounds and found none.

    We have not read its changelogs yet.

    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 · 5 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 in the description
      Changelogs not read yet
    • 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
      885 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 found
      20 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 file
      376 code files read

    Compatibility

    See all 4 files
    Forge
    1.71.101.151.1926.1

    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.No file yet for any of the last 6 Minecraft versions.

    Modpacks using this project

    Find modpacks with it

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

    ModpackDownloadsLast version with it
    Technicians' Survival11K downloadslast version with it 4 Jul 2018Technicians' Survival 25.3K downloadslast version with it 19 Nov 2018Realm of Mazara5.3K downloadslast version with it 15 May 2020Trilex Pack5.1K downloadslast version with it 16 Jan 2018The HardRock2.3K downloadslast version with it 2 Nov 2019Victoria Gloria1.7K downloadslast version with it 12 May 2018Veridia1.4K downloadslast version with it 26 Jan 2018Primal Wilderness1.1K downloadslast version with it 20 Jan 2019SGBSWSPMC1K downloadslast version with it 27 Jun 2018Primal Engineers254 downloadslast version with it 21 Mar 2020
    1 to 10 of 1312

    Latest files

    The newest file for each Minecraft version and loader. None is for a recent Minecraft version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    Older Minecraft versions
    1.12.2·Forge0.0.400.0.40 · MagnumOpus-1.12.2-0.0.40.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.7.10·Forge0.7.570.7.57 · MagnumOpus-1.7.10-0.7.57.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    4 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.12.2The latest file for its Minecraft version and loader·Forge0.0.400.0.40 · MagnumOpus-1.12.2-0.0.40.jarBeta·18 Sep 2019PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Beta · 4.0 MB
    1.12.2·Forge0.0.390.0.39 · MagnumOpus-1.12.2-0.0.39.jarBeta·3 Jul 2019PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Beta · 3.4 MB
    1.12.2·Forge0.0.380.0.38 · MagnumOpus-1.12.2-0.0.38.jarBeta·17 Nov 2018PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Beta · 3.3 MB
    1.7.10The latest file for its Minecraft version and loader·Forge0.7.570.7.57 · MagnumOpus-1.7.10-0.7.57.jar·16 Jul 2016PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 3.0 MB