The Spell Library
by bob_bacon
The Spell Library is a Fabric library mod that gives other mods a shared base for spells, rituals and a mana system, and it needs Registry Helper Lib.
What it does
The mod is a code-driven library that provides developer-friendly utilities for building customizable spells and rituals. It bundles a mana system in which mana regenerates according to the player's current health, so lower health slows the regeneration rate. Spells are found in scrolls, and the default registered spells are added to scrolls; a scroll contains the spell it is used to cast.
Registry Helper Lib is a required dependency and must be installed alongside The Spell Library on Fabric. A server running it needs every connecting player to have it too. Files are published for Fabric only, across four game versions, 1.20.1 – 1.20.4, with 1.2.15 for 1.20.4 as the latest file, an alpha build released on 2026-04-12. The mod is released under All rights reserved, and its source code and a wiki are linked publicly.
Key features
Mana system
Mana is a resource that regenerates over time and scales with the player's current health.
Spell scrolls
Spells are obtained as scrolls, and default registered spells are added to the scroll set.
Spell book
A spell book item is included for keeping and organizing spells.
Developer utilities
Mod developers get a library of helpers for registering spells, rituals and their mana costs.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Building spell-based mods
Developers can use the library as a foundation for new magic content that needs spells and rituals.
Who it’s for: Players who want spell scrolls and a health-linked mana system, and mod developers who want a base for spells and rituals on Fabric 1.20.4 and its neighboring versions.
How it compares
Spellbound is a Fabric mod for 1.20.1 – 1.20.6 that runs on client and server, and it is released under the MIT License without open source code. Archon is a Fabric mod for 1.20 – 1.20.6, client and server, under the GNU General Public License v3.0 only, and it is open source. Matadora is a Fabric mod for 1.20.1 only, client and server, under All rights reserved and not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| The Spell Library | Fabric | 1.20.1 – 1.20.4 | Client and server | 2026-04-12 |
| Spellbound | Fabric | 1.20.1 – 1.20.6 | Client and server | 2025-08-10 |
| Archon | Fabric | 1.20 – 1.20.6 | Client and server | 2025-04-23 |
| Matadora | Fabric | 1.20.1 | Client and server | 2026-03-14 |
Questions
Does The Spell Library need Registry Helper Lib?
Does the server need The Spell Library?
Which game versions does The Spell Library support?
In the catalog
The Spell Library is one of 7,216 Magic mods on ModsFinder, and one of 3,630 Magic mods for Fabric. 13,907 mods support Minecraft 1.20.4.
More from bob_bacon
Similar mods
What the author says
This library provides useful tools to develop spells and rituals, with an integrated mana and scroll system. This mod is currently in alpha
Official listing
- Modrinth page
- modrinth.com/mod/the-spell-library
- Owner
- bob_bacon
- Published
- 2026-02-10
- Updated on Modrinth
- 2026-04-12
- Facts verified
- 2026-10-15