Spell Utils Mod (1.21.1) – Library for Iron’s Spells and Spellbooks Addons
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March 19, 2026
Spell Utils Mod is a utility API designed to help developers create addons for Iron’s Spells and Spellbooks Mod. It provides ready-to-use systems, classes, and tools that simplify the process of building custom spells, mobs, and bosses. This mod is mainly intended for mod developers, not regular players.

Features:
- Mob & Boss Systems
- Custom spellcasting mob class (supports long, instant, and continuous casting animations)
- Generic boss entity class (simplifies boss creation)
- Unique boss entity class (for bosses with custom models and spellcasting)
- Wizard spell combo AI behavior for spellcasting mobs
- Boss Music System
- Custom boss music manager
- Dynamic music handling during boss fights
- Items & Equipment
- Imbueable curio items
- Imbueable staff class
- Sheath curio support
- Custom item rarities
- Attributes
- Mana Steal
- Mana Rend
- Hunger Steal
- Evasive
- Utilities
- Helper classes for spells and mobs
- Various reusable casting animations
How to Install:
New to Minecraft? Follow our step-by-step guide to install Mods on your PC.View Guide
Spell Utils Mod Download Links
For Minecraft 1.21.1, 1.21
NeoForge version: Download from Server 1 – Download from Server 2
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