Cataclysm: Spellbooks

Cataclysm: Spellbooks

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

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About this Mod

📜Description

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Cataclysm: Spellbooks is an addon for both Iron's Spells 'n Spellbooks and L_Ender's Cataclysm.

Currently this mod adds in a total of 65 new spells, with more planned for development. This mod also adds in two new spell schools: Abyssal and Technomancy. The Abyssal School houses all of the Leviathan based spells, and Technomancy is inspired by The Harbinger.

NOTE: THIS MOD IS STILL BEING DEVELOPED AND SPELLS WILL BE ADDED!

If you would like to see which spells are planned, head over to the Github Page to check!


Discord Button (StarOcean)Discord Button (Ace)

🔗Links

Discord Server (StarOcean)
Discord Server (AcetheEldritchKing)
Github Source (New 1.21.1)
Github Source (1.21.1)
Github Source
Curseforge Page

Available Versions

Cataclysm: Spellbooks 1.1.11-1.21release
MC 1.21.1neoforge
March 2, 2026
Cataclysm: Spellbooks 1.1.10-1.21release
MC 1.21.1neoforge
March 2, 2026
Cataclysm: Spellbooks 1.2.9-1.20.1release
MC 1.20.1forge
February 27, 2026
Cataclysm: Spellbooks 1.2.8-1.20.1release
MC 1.20.1forge
January 11, 2026
Cataclysm: Spellbooks 1.1.10-1.21release
MC 1.21.1neoforge
December 20, 2025

How to Install Cataclysm: Spellbooks on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Cataclysm: Spellbooks". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forgeneoforge

Minecraft Versions

1.21.1, 1.20.1, 1.19.2

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Cataclysm: Spellbooks server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Cataclysm: Spellbooks compatible with forge and neoforge?

Cataclysm: Spellbooks officially supports forge, neoforge for Minecraft 1.21.1, 1.20.1, 1.19.2. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Cataclysm: Spellbooks – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Cataclysm: Spellbooks consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Cataclysm: Spellbooks with just one click on your server.

Recommended RAM
4 GBfrom €5.2/mo
Minimum 3 GB | per 8 players
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NVMe SSD Storage
DDoS Protection included

Details

License
GNU Lesser General Public License v2.1 only
Server-side
Required

Supported Versions

1.21.11.20.11.19.2