KubeJS Iron's Spells
An addon for KubeJS that allows for creating custom spells, spellbooks, and more from Iron's Spells 'n Spellbooks.
About this Mod
This mod does not add content on its own.
This is a KubeJS addon that allows for script creators to have access to creating custom Iron's Spells and Spellbooks features, such as:
- Custom spells
- Custom spell schools and attributes for them
- Custom special items such as staves, spell books, and magic swords
- Special event handlers, e.g.
PlayerEvents.changeMana - EntityJS compatibility for custom spell-casting mobs and changing existing mob AI to cast spells
- Alchemist Cauldron recipe support
- Full ProbeJS support
- More soon!
More info on the official KubeJS Wiki page for third-party addons.
Available Versions
How to Install KubeJS Iron's Spells on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "KubeJS Iron's Spells". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.20.1, 1.19.2
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
KubeJS Iron's Spells 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 KubeJS Iron's Spells compatible with forge and neoforge?
KubeJS Iron's Spells 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 KubeJS Iron's Spells – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if KubeJS Iron's Spells 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.
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Rent Modded Server
Install KubeJS Iron's Spells with just one click on your server.