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    2,055,424 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 2026.269,392 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.

    Spell Engine Extension (RPG Series Tweaks)

    Mod

    Gives spell creators more ways to customize how spells work.

    A94/ 100
    • OverviewA
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.21.1
    • ModpacksIn 26
    • ReleasesLatest 29 Sep

    Download

    spellengine-extension-2.17.2.jar

    Released 29 Sep 2026 · 159.6 KB

    Passed: our checks found nothing harmful in this file.

    Download

    Required to run

    • Fzzy ConfigAMinecraft 1.21.1 · Fabric (release 0.7.7)
    • Spell EngineAMinecraft 1.21.1 · Fabric (release 1.10.9)
    • Fabric APIAMinecraft 1.21.1 · Fabric (release 0.116.17)
    • Fabric Language KotlinNeeded by Fzzy ConfigAMinecraft 1.21.1 · Fabric (release kotlin.2.4.21)
    • Cloth Config APINeeded by Spell EngineAMinecraft 1.21.1 · Fabric (release 15.0.140)
    • Spell Power AttributesNeeded by Spell EngineAMinecraft 1.21.1 · Fabric (release 1.6.0)
    • playerAnimatorNeeded by Spell EngineBMinecraft 1.21.1 · Fabric (release 2.0.4)
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade A

    How grades work

    Strengths

    • Security checks passed
    • Regular releases for Minecraft 1.21.1, a version many recently updated mods still support
    • Public source code and issue tracker
    • Around for years

    Points lost

    • Many modpacks removed it−3 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      Full points27 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4 weeks ago (29 Sep 2026) 12 / 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.1.21.1 on Fabric. 53% of the 718 popular Fabric 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 19 of the last 24 months 6 / 6

    • Stability

      3 points lost19 / 22
      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.4 of the 20 modpacks with two or more versions removed it in a later one (20%) See the 4 modpacks7 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.2 of its 38 releases in 2 years needed a quick fix (5%) 7 / 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

      Full points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · TheRedBrain/spellengine-extension 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · TheRedBrain/spellengine-extension 3 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.48,190 3 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.2.5 years, 45 releases 8 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files for recent Minecraft versions. See Security
    Total94 / 100

    66.5 of the 71 points that apply = 94 out of 100. The points above are rounded to whole numbers.

    About

    Spell Engine Extension is a toolkit for Spell Engine mod and data-pack authors, adding configurable ways to define spell behavior rather than changing gameplay on its own. Authors can set direct damage and healing, override damage types, consume the casting item, and charge health, mana, stamina, or status effects, including costs applied repeatedly while channeling. Mana and stamina costs work when the corresponding Mana Attributes or Stamina Attributes mod is installed, and spell costs can be adjusted with multipliers or spell modifiers. Casting can be restricted by the item and hand used, and conditional spell containers can switch off or replace an item's spells depending on whether it is held one-handed, two-handed, or dual-wielded. Server-configurable movement locking can prevent movement and rotation during tagged spells and for a defined period after casting. The extension also supports spell modifiers for extra costs, damage, and healing; effects or enchantments that provide spell lists; and configurable spell hotbar display options, including cooldown indicators and alternate cooldown icons. Its built-in data pack enables Spell Engine Extension features for RPG Series mods, including allowing weapon skills in the use-item spell hotbar slot.

    Written from Modrinth and the GitHub README . How we write it

    In-game changes

    Changes the game's code in 4 areas, as a library other mods build on: Mobs and their behaviorChanges 4 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., PlayerChanges 3 game code files in this area: your character: movement, abilities, hunger and controls., Game optionsChanges 1 game code file in this area: settings, key bindings and the option screens. and Game coreChanges 1 game code file in this area: the main loop, lighting and other code the whole game uses..

    Adds no new blocks, items or other content.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Often used with it

    See all 30
    RunesAWizards (RPG Series)AMod MenuAFerriteCoreALithiumA

    Details

    Creator
    TheRedBrain
    License
    MIT License
    Downloads
    48K
    Created
    6 May 2024
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues , Discord

    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 · 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. Both 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
    • 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 · 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 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 so far that AI was used to make it

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

    We have not read its code history 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.
      No AI content or AI features declared.
    • Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.
      Not read yet
    • 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
      20 of 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
      2 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
      58 code files read

    Compatibility

    See all 45 files
    Fabric
    1.201.2126.126.3

    Point at or tap a version to see its loaders.

    Runs onWhere to install it: in your game, on the server, or both. As the author says on Modrinth.Needed in your game and on the server, or you cannot join.
    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.
    Fzzy ConfigASpell EngineAFabric APIA
    OptionalProjects it can work with but does not need. The author lists them.
    Ranged Weapon APIAAttack Range Attributein some filesCStamina AttributesBRPG Inventoryin some filesBMana AttributesB
    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.It has no file for Minecraft versions newer than 1.21.1. Many recently updated mods still support 1.21.1.

    Modpacks using this project

    Find modpacks with it

    Modpacks that include Spell Engine Extension (RPG Series Tweaks) in at least one of their versions, most downloaded first.

    ModpackDownloadsLast version with it
    Guild Adventures145K downloadslast version with it 17 Jul 2025S-Rank Studios Cobblemon5.6K downloadslast version with it 23 Jan 2025Realism+5.6K downloadslast version with it 27 Jan 2025Femboy Hideaway Cobblemon2.4K downloadslast version with it 17 Dec 2024The variety pack2.3K downloadslast version with it 19 Nov 2024MC Forever1.6K downloadslast version with it 19 Apr 2026VeinBorne Realms1.5K downloadslast version with it 25 Dec 2025ApostleCraft1.1K downloadslast version with it 17 Jun 2024Enhanced Vanilla Plus ++1.1K downloadslast version with it 14 Jul 2025World Of Ariell [MMORPG ULTIMATE]912 downloadslast version with it 17 Oct 2024
    1 to 10 of 26123

    Often in the same modpacks

    Mods that modpacks often add together with Spell Engine Extension (RPG Series Tweaks). Share: how many of the modpacks with Spell Engine Extension (RPG Series Tweaks) also have that mod.

    ProjectTypeShareGrade
    RunesAModin 92% of the modpacks with Spell Engine Extension (RPG Series Tweaks)Wizards (RPG Series)AModin 77% of the modpacks with Spell Engine Extension (RPG Series Tweaks)Mod MenuAModin 77% of the modpacks with Spell Engine Extension (RPG Series Tweaks)FerriteCoreAModin 73% of the modpacks with Spell Engine Extension (RPG Series Tweaks)LithiumAModin 73% of the modpacks with Spell Engine Extension (RPG Series Tweaks)Extra RPG AttributesAModin 69% of the modpacks with Spell Engine Extension (RPG Series Tweaks)Paladins & Priests (RPG Series)AModin 65% of the modpacks with Spell Engine Extension (RPG Series Tweaks)Farmer's Delight RefabricatedAModin 65% of the modpacks with Spell Engine Extension (RPG Series Tweaks)Archers (RPG Series)AModin 62% of the modpacks with Spell Engine Extension (RPG Series Tweaks)Chat HeadsAModin 62% of the modpacks with Spell Engine Extension (RPG Series Tweaks)
    1 to 10 of 30123

    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
    1.21.1·Fabric2.17.22.17.2 · spellengine-extension-2.17.2.jarSends: None foundRequires:Fzzy Config, Spell Engine, Fabric APIFzzy Config, Spell Engine, Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Fabric1.3.11.3.1 · spellengine-extension-1.3.1.jarSends: None foundRequires:Spell Engine, Fabric API, Fzzy ConfigSpell Engine, Fabric API, Fzzy ConfigPassedOur checks found nothing harmful in this file. Its code was read too.

    45 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1The latest file for its Minecraft version and loader·Fabric2.17.22.17.2 · spellengine-extension-2.17.2.jar (main file)·29 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 159.6 KB
    1.21.1·Fabric2.17.12.17.1 · spellengine-extension-2.17.1.jar (main file)·29 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 159.6 KB
    1.21.1·Fabric2.17.02.17.0 · spellengine-extension-2.17.0.jar (main file)·18 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 159.6 KB
    1.21.1·Fabric2.16.22.16.2 · spellengine-extension-2.16.2.jar (main file)·11 Aug 2026PassedOur checks found nothing harmful in this file. Same code on Modrinth and CurseForge.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 156.1 KB
    1.21.1·Fabric2.16.12.16.1 · spellengine-extension-2.16.1.jar (main file)·29 Jul 2026PassedOur checks found nothing harmful in this file. Same code on Modrinth and CurseForge.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 156.1 KB
    1.21.1·Fabric2.16.02.16.0 · spellengine-extension-2.16.0.jar (main file)·25 Mar 2026PassedOur checks found nothing harmful in this file. Same code on Modrinth and CurseForge.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 157.6 KB
    1.21.1·Fabric2.15.12.15.1 · spellengine-extension-2.15.1.jar (main file)·11 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 158.2 KB
    1.21.1·Fabric2.15.02.15.0 · spellengine-extension-2.15.0.jar (main file)·11 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 158.4 KB
    1.21.1·Fabric2.14.02.14.0 · spellengine-extension-2.14.0.jar (main file)·5 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 158.3 KB
    1.21.1·Fabric2.13.02.13.0 · spellengine-extension-2.13.0.jar (main file)·1 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 256.7 KB
    1.21.1·Fabric2.12.02.12.0 · spellengine-extension-2.12.0.jar (main file)·23 Jan 2026PassedOur checks found nothing harmful in this file. Same code on Modrinth and CurseForge.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 228.7 KB
    1.21.1·Fabric2.11.22.11.2 · spellengine-extension-2.11.2.jar (main file)·10 Dec 2025PassedOur checks found nothing harmful in this file. Same code on Modrinth and CurseForge.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 223.9 KB
    1.21.1·Fabric2.11.12.11.1 · spellengine-extension-2.11.1.jar (main file)·1 Nov 2025PassedOur checks found nothing harmful in this file. Same code on Modrinth and CurseForge.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 223.9 KB
    1.21.1·Fabric2.11.02.11.0 · spellengine-extension-2.11.0.jar (main file)·4 Oct 2025PassedOur checks found nothing harmful in this file. Same code on Modrinth and CurseForge.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 223.9 KB
    1.21.1·Fabric2.10.22.10.2 · spellengine-extension-2.10.2.jar (main file)·15 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 155.3 KB
    1.21.1·Fabric2.10.12.10.1 · spellengine-extension-2.10.1.jar (main file)·25 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 155.4 KB
    1.20.1The latest file for its Minecraft version and loader·Fabric1.3.11.3.1 · spellengine-extension-1.3.1.jar (main file)·25 Aug 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 126.5 KB
    1.21.1·Fabric2.10.02.10.0 · spellengine-extension-2.10.0.jar (main file)·21 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 155.4 KB
    1.21.1·Fabric2.9.02.9.0 · spellengine-extension-2.9.0.jar (main file)·10 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 129.2 KB
    1.21.1·Fabric2.8.02.8.0 · spellengine-extension-2.8.0.jar (main file)·28 Jul 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 98.0 KB
    1 to 20 of 45123

    Quick fixes

    In the last 2 years, 2 releases needed a quick fix: a new release within 3 days to fix a problem. This counts in the grade, but it is too few to lose points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.2

    • 2.15.111 Mar 20262.15.1 Fixes - fixed crash when casting modified spells - temporarily…
    • 2.5.531 Mar 2025…2.5.5 - now works with Spell Engine 1.6.2 - fixed a crash that could occur when rendering tooltips