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    2,046,932 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 24 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 24 Oct 2026.269,480 projects gradedProjects with a letter from A to F. Counted on 24 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Cataclysm: Spellbooks

    Mod

    An addon for Iron's Spells and Spellbooks and L_Ender's Cataclysm.

    B89/ 100
    • OverviewB
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.21.1
    • ModpacksIn 1,347
    • ReleasesLatest 9 Sep

    Download

    cataclysm_spellbooks-1.1.11-1.21.jar

    Released 2 Mar 2026 · 708.2 KB

    Passed: our checks found nothing harmful in this file.

    A newer beta from 9 Sep 2026 is in Releases.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    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
    • Widely used
    • Around for years

    Points lost

    • Many modpacks removed it−4 points
    • Releases replaced within 3 days to fix a problem−4 points
    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.6 weeks ago (9 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 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 14 of the last 24 months 6 / 6

    • Stability

      8 points lost14 / 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.79 of the 381 modpacks with two or more versions removed it in a later one (21%) See the 79 modpacks6 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.8 of its 28 releases in 2 years needed a quick fix (29%) See the 8 releases3 / 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 · AceTheEldritchKing/Cataclysm_Spellbooks 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · AceTheEldritchKing/Cataclysm_Spellbooks 3 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.4,334,028 4 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.2.1 years, 35 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
    Total89 / 100

    63.1 of the 71 points that apply = 89 out of 100. The points above are rounded to whole numbers.

    Images

    • All Armors (Day)
    • All Armors (Night)
    • Guns
    • Phantom Remnant

    About

    Cataclysm: Spellbooks is an addon for Iron’s Spells and Spellbooks and L_Ender’s Cataclysm that adds 65 spells, organized in part into the Abyssal and Technomancy schools. Its spells draw on Cataclysm bosses, including the Leviathan, Ignis, and Ender Guardian, with Abyssal magic centered on the Leviathan and Technomancy inspired by the Harbinger. The spell roster includes targeted attacks and area effects such as Abyssal Beam, which marks a target for a damaging void beam, and Dimensional Rift, which pulls in entities and blocks before exploding. Other examples include Abyssal Predator, which improves movement and damage underwater or in rain, and Ignis-themed spells such as Incineration, Infernal Strike, and Hellish Blade, which can apply Blazing Brand and stun. Some spells must be unlocked before crafting by carrying or holding particular items; for example, Burning Manuscripts unlock Ignis fire spells, Frozen Tablets unlock Maledictus ice spells, and the Tidal Claw unlocks certain Abyssal spells.

    Written from Modrinth . How we write it

    In-game changes

    Changes the game's code in 1 area: Game optionsChanges 1 game code file in this area: settings, key bindings and the option screens..

    Adds 77 items, 3 mobs, 4 projectiles, 24 other entities, 65 recipes, 3 loot tables 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 30
    L_Ender's CataclysmBIron's Spells 'n SpellbooksAMowzie's MobsBRelicsASophisticated StorageA

    Details

    Creators
    AceTheEldritchKing and StarOcean
    License
    GNU Lesser General Public License v2.1 only
    Downloads
    4.3M
    Created
    9 Sep 2024
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues

    Security

    No harmful code found

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

    What it can do on your computer

    Creates settings files
    The mod keeps its settings in the config folder of your game, where you can change or delete them.

    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 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.
      3 latest files: the newest file for each Minecraft version and loader. The answer above is about the 2 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 that AI was used to make it

    We looked for AI tools in its texts, files, images and code history 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 · 6 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.
      Nothing found
    • 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
      249 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
      142 code files read

    Compatibility

    See all 35 files
    NeoForge
    Forge
    1.191.2126.1

    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.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.It has no file for Minecraft versions newer than 1.21.1. Many recently updated mods still support 1.21.1.

    Related projects

    Projects that need Cataclysm: Spellbooks to work.

    ProjectTypeDownloadsGrade
    Cataclysm: Spellbooks & BetterCombat - CompatibilityCMod180K downloadsCataclysm: Spellbooks ReimaginedAResource pack68K downloadsElemental SynergiesAMod61K downloadsBetter Combat x Cataclysm Spellbooks CompatibilityEMod49K downloadsRemnants Of A Cruel WorldCMod13K downloadsIgnis Soulfires: SpellbooksCMod5.5K downloadsJust Enough Mods: CalamitousBMod94 downloads

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    2001000
    Oct 2024: 3 modpacksNov 2024: 6 modpacksDec 2024: 6 modpacksJan 2025: 3 modpacksFeb 2025: 19 modpacksMar 2025: 38 modpacksApr 2025: 38 modpacksMay 2025: 40 modpacksJun 2025: 51 modpacksJul 2025: 90 modpacksAug 2025: 135 modpacksSep 2025: 145 modpacksOct 2025: 125 modpacksNov 2025: 117 modpacksDec 2025: 131 modpacksJan 2026: 159 modpacksFeb 2026: 141 modpacksMar 2026: 161 modpacksApr 2026: 139 modpacksMay 2026: 144 modpacksJun 2026: 148 modpacksJul 2026: 146 modpacksAug 2026: 156 modpacksSep 2026: 144 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20243
    Nov 20246
    Dec 20246
    Jan 20253
    Feb 202519
    Mar 202538
    Apr 202538
    May 202540
    Jun 202551
    Jul 202590
    Aug 2025135
    Sep 2025145
    Oct 2025125
    Nov 2025117
    Dec 2025131
    Jan 2026159
    Feb 2026141
    Mar 2026161
    Apr 2026139
    May 2026144
    Jun 2026148
    Jul 2026146
    Aug 2026156
    Sep 2026144

    More modpacks put it in their new versions than a year ago: 146 a month now, 83 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..

    1,347 modpacks include Cataclysm: Spellbooks in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    Craftoria2.9M downloadslast version with it 13 Sep 2026MC Eternal 21.9M downloadslast version with it 16 Sep 2026Soulrend - Dark Fantasy RPG Soulslike1.1M downloadslast version with it 13 Oct 2025Age of Fate564K downloadslast version with it 16 May 2026SUPERIOR - RPG513K downloadslast version with it 26 Jul 2025MineField Mods361K downloadslast version with it 26 Mar 2026TNP Limitless 8 - LL8333K downloadslast version with it 16 Oct 2026Official Tensura: Reincarnated Survival Server325K downloadslast version with it 15 Jan 2025Medieval MC [NEOFORGE] MMC5310K downloadslast version with it 4 May 2026Tensura Journey of Reincarnation285K downloadslast version with it 4 Mar 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with Cataclysm: Spellbooks. Share: how many of the modpacks with Cataclysm: Spellbooks also have that mod.

    ProjectTypeShareGrade
    L_Ender's CataclysmBModin 100% of the modpacks with Cataclysm: SpellbooksIron's Spells 'n SpellbooksAModin 100% of the modpacks with Cataclysm: SpellbooksMowzie's MobsBModin 67% of the modpacks with Cataclysm: SpellbooksRelicsAModin 65% of the modpacks with Cataclysm: SpellbooksSophisticated StorageAModin 64% of the modpacks with Cataclysm: SpellbooksAttributeFixAModin 58% of the modpacks with Cataclysm: SpellbooksApotheosisAModin 57% of the modpacks with Cataclysm: SpellbooksAmendmentsAModin 56% of the modpacks with Cataclysm: SpellbooksMmmMmmMmmMmmAModin 55% of the modpacks with Cataclysm: SpellbooksLoot IntegrationsAModin 54% of the modpacks with Cataclysm: Spellbooks
    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·NeoForge1.1.11-1.211.1.11-1.21 · cataclysm_spellbooks-1.1.11-1.21.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.2.91.2.9 · cataclysm_spellbooks-1.2.9-1.20.1-all.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.19.2·Forge1.2.01.2.0 · cataclysm_spellbooks-1.2.0-1.19.2-all.jarSends: None foundRequires:AzureLib, Iron's Spells 'n Spellbooks, L_Ender's CataclysmAzureLib, Iron's Spells 'n Spellbooks, L_Ender's CataclysmPassedOur checks found nothing harmful in this file. Its code was read too.

    35 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1·NeoForge1.1.14-1.211.1.14-1.21 · cataclysm_spellbooks-1.1.14-1.21.jar (main file)Beta·9 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 1.1 MB
    1.21.1·NeoForge1.1.13-1.211.1.13-1.21 · cataclysm_spellbooks-1.1.13-1.21.jar (main file)Beta·2 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 1.1 MB
    1.21.1·NeoForge1.1.12-1.211.1.12-1.21 · cataclysm_spellbooks-1.1.12-1.21.jar (main file)Alpha·31 May 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Alpha · 855.0 KB
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.1.11-1.211.1.11-1.21 · cataclysm_spellbooks-1.1.11-1.21.jar (main file)·2 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 708.2 KB
    1.21.1·NeoForge1.1.10-1.211.1.10-1.21 · cataclysm_spellbooks-1.1.10-1.21.jar (main file)·2 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 698.4 KB
    1.20.1The latest file for its Minecraft version and loader·Forge1.2.91.2.9 · cataclysm_spellbooks-1.2.9-1.20.1-all.jar (main file)·27 Feb 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.2 MB
    1.20.1·Forge1.2.81.2.8 · cataclysm_spellbooks-1.2.8-1.20.1-all.jar (main file)·11 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.2 MB
    1.21.1·NeoForge1.1.10-1.211.1.10-1.21 · cataclysm_spellbooks-1.1.10-1.21.jar (main file)·20 Dec 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 440.4 KB
    1.20.1·Forge1.2.71.2.7 · cataclysm_spellbooks-1.2.7-1.20.1-all.jar (main file)·21 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.2 MB
    1.20.1·Forge1.2.61.2.6 · cataclysm_spellbooks-1.2.6-1.20.1-all.jar (main file)·20 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.2 MB
    1.20.1·Forge1.2.51.2.5 · cataclysm_spellbooks-1.2.5-1.20.1-all.jar (main file)·4 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.2 MB
    1.20.1·Forge1.2.41.2.4 · cataclysm_spellbooks-1.2.4-1.20.1-all.jar (main file)·3 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.2 MB
    1.20.1·Forge1.2.31.2.3 · cataclysm_spellbooks-1.2.3-1.20.1-all.jar (main file)·3 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.2 MB
    1.21.1·NeoForge1.1.9-1.211.1.9-1.21 · cataclysm_spellbooks-1.1.9-1.21.jar·25 Aug 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 459.6 KB
    1.21.1·NeoForge1.1.8-1.211.1.8-1.21 · cataclysm_spellbooks-1.1.8-1.21.jar·24 Aug 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 458.9 KB
    1.20.1·Forge1.2.21.2.2 · cataclysm_spellbooks-1.2.2-1.20.1-all.jar (main file)·14 Jul 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.1 MB
    1.20.1·Forge1.2.11.2.1 · cataclysm_spellbooks-1.2.1-1.20.1-all.jar (main file)·12 Jul 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.1 MB
    1.20.1·Forge1.2.01.2.0 · cataclysm_spellbooks-1.2.0-1.20.1-all.jar (main file)·11 Jul 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.1 MB
    1.19.2The latest file for its Minecraft version and loader·Forge1.2.01.2.0 · cataclysm_spellbooks-1.2.0-1.19.2-all.jar (main file)·11 Jul 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.1 MB
    1.21.1·NeoForge1.1.7-1.211.1.7-1.21 · cataclysm_spellbooks-1.1.7-1.21.jar (main file)Beta·15 Apr 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 448.3 KB
    1 to 20 of 3512

    Quick fixes

    In the last 2 years, 8 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 4 points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.8

    • cataclysm_spellbooks-1.1.11-1.21.jar2 Mar 2026Changelog: Fixed crash with potion effects, Pharaoh's Wrath is now…
    • cataclysm_spellbooks-1.2.7-1.20.1-all.jar21 Oct 2025Changelog: - Fixed startup crash
    • cataclysm_spellbooks-1.2.5-1.20.1-all.jar4 Oct 2025Changelog: - Actually fixed Final Rend crash this time
    • cataclysm_spellbooks-1.2.4-1.20.1-all.jar3 Oct 2025Changelog: Fixed crash regarding crafting the Excelsius armors…
    • cataclysm_spellbooks-1.1.9-1.21.jar25 Aug 2025Changelog: - Fixed armor attributes not applying correctly
    • cataclysm_spellbooks-1.2.2-1.20.1-all.jar14 Jul 2025…Strike damage to 1.21.1 values Fixed Missile Barrage
    • cataclysm_spellbooks-1.2.1-1.20.1-all.jar12 Jul 2025Changelog: Fixed recipes for certain items not appearing Fixed…
    • cataclysm_spellbooks-1.1.2-1.21.jar4 Feb 2025Changelog: Fixed server crash