CurseForge · Minecraft mod

Ace's Spell Utils

An util API for making Iron's Spells and Spellbooks addons

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Ace's Spell Utils release should I use?

Updated 11 days ago

Latest stable file aces_spell_utils-1.2.7.2-1.21.1.jar

Game version 1.21.1

Loader NeoForge

Ace's Spell Utils aces_spell_utils-1.2.7.2-1.21.1.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 5 required mods have matching files.

Where it goes

Is Ace's Spell Utils required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say

Dedicated server Source doesn’t say

Loader for this release NeoForge

Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Ace's Spell Utils aces_spell_utils-1.2.7.2-1.21.1.jar need?

aces_spell_utils-1.2.7.2-1.21.1.jar. Change the file and its required mods may change too.

All 5 required mods have matching files

Install Iron's Spells 'n Spellbooks, playerAnimator, Iron's Lib, GeckoLib and 1 more first. We found matching files for this game-version and loader setup. 5 come through another mod in the chain.

1 listed on this file 5 pulled in by those mods

Iron's Spells 'n Spellbooks Needed by Ace's Spell Utils aces_spell_utils-1.2.7.2-1.21.1.jar

required

Matching file found Matched file: v1.21.1-3.16.3

playerAnimator Needed by Iron's Spells 'n Spellbooks

pulled in

Matching file found Matched file: player-animation-lib-forge-2.0.4+1.21.1.jar

Iron's Lib Needed by Iron's Spells 'n Spellbooks

pulled in

Matching file found Matched file: irons_lib-1.21.1-2.1.0.jar

GeckoLib Needed by Iron's Spells 'n Spellbooks

pulled in

Matching file found Matched file: NeoForge 1.21.1 4.9.2

Curios API Needed by Iron's Spells 'n Spellbooks

pulled in

Matching file found Matched file: curios-neoforge-9.5.1+1.21.1.jar

bendy-lib Needed by playerAnimator

pulled in

No matching file

5 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.

Before you install it

Add Ace's Spell Utils without breaking your instance.

Built for Ace's Spell Utils aces_spell_utils-1.2.7.2-1.21.1.jar. Pick another file and the loader, install side or required mods may change.

01
Stick to this file

Use aces_spell_utils-1.2.7.2-1.21.1.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
02
Bring the mods it needs

Install Iron's Spells 'n Spellbooks, playerAnimator, Iron's Lib, GeckoLib and 1 more first. We found matching files for this game-version and loader setup. 5 come through another mod in the chain.
03
Put it on the correct side

The project page does not say whether this file belongs on the client, dedicated server, or both.
04
Pick the file you checked

Use the “Get this file” button beside aces_spell_utils-1.2.7.2-1.21.1.jar. It opens that exact file at the source.

About this project

What does Ace's Spell Utils add?

Ace's Spell Utils is a util API made for making Iron's Spells and Spellbooks addons. This mod contains some useful methods and classes for mod devs to use for their addons. Features will be continuously added if something is suggested or the need arises to make more.

Current features:

Entities:

Unique Spellcasting Mob class, used for making mobs with custom models to have custom casting animations for long, instant and continuous spells
Unique Melee Spellcasting Mob
Generic Boss Entity class for making custom bosses more streamlined
Generic Unique Boss Entity class for making spellcasting entities with custom models
Wizard Spell Combo goal for spellcasting mobs
Custom Domain Spell Entity

Items:

Imbueable & Preset Imbue Curio class
Imbueable & Preset Imbue Staff class
Sheath Curio class (with custom player model rendering)
Custom item rarities for use
Extended, Imbueable & Preset Imbue Mace Item and Mace Staff Item (credit to Hazen)
Active + Passive Ability Sword Item
Active + Passive Ability Magic Sword Item
Magic Gun Item
Custom Loot Bag Item (drops specified loot tables)
Flat Cooldown Passive Ability Item
Passive Ability Spellbook

Attributes:

Mana Steal attribute
Mana Rend attribute
Goliath Slayer attribute
Hunger Steal attribute
Spell Resistence Penetration attribute
Evasive attribute
Magic Damage Crit Chance attribue
Magic Damage Crit Damage attribute
Magic Projectile Crit Chance attribute
Magic Projectile Crit Damage attribute
Magic Projectile Bonus Damage attribute
Life Recovery attribute
Vigor Reap attribute

Spells:

Custom spell schools: Occult, Hydro & Technomancy
Various custom casting animations free for use
Abstract Summon Spell class (credit to Auri)

Utils:

A general Boss Music Manager & Boss Music Instance classes for doing custom and dynamic boss music
A utils classes with niche methods for spells and mobs
Custom post-processing shader handler (credit to Fire)
Custom emissive Geckolib armor renderer

This mod is open source and MIT; any ISS addon dev is free to use this API for their mods. Any issues or suggestions should be added to the Github page

Need a server? Check out Bisect Hosting!

Project description from CurseForge.

Pick your setup

Ace's Spell Utils by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

1 available setups

Minecraft version

1.21.1

1 loader build

NeoForge aces_spell_utils-1.2.7.2-1.21.1.jar 36 stable files · 36 total · 2 Sept 2026

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Ace's Spell Utils versions and loaders

36 of 36 releases match

aces_spell_utils-1.2.7.2-1.21.1.jar

2 Sept 2026

Client Source doesn’t say Server Source doesn’t say Dependencies 5 required · matched Listed on Release listing

Check the 1.21.1 · NeoForge setup

1.21.1NeoForge release

Download on CurseForge