CurseForge · Minecraft mod
[ES]Esoteric Spells - Iron's Spells Addon
Adds a series of Esoteric school-related content, with spells for offense, defense, spellblade & more! Also adds default-friendly warlocks & trials, powerful endgame accessories, and a completely friendly dimension!
Quick answer
Which [ES]Esoteric Spells - Iron's Spells Addon release should I use?
[ES]Esoteric Spells - Iron's Spells Addon esoteric_spell-1.3.51.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 [ES]Esoteric Spells - Iron's Spells Addon required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does [ES]Esoteric Spells - Iron's Spells Addon esoteric_spell-1.3.51.jar need?
esoteric_spell-1.3.51.jar. Change the file and its required mods may change too.
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.
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 [ES]Esoteric Spells - Iron's Spells Addon without breaking your instance.
Built for [ES]Esoteric Spells - Iron's Spells Addon esoteric_spell-1.3.51.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use esoteric_spell-1.3.51.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 esoteric_spell-1.3.51.jar. It opens that exact file at the source.
About this project
What does [ES]Esoteric Spells - Iron's Spells Addon add?
This mod adds balanced Esoteric school spells, along with matching orbs, runes, sorcerer armor sets, staves, and more.
The Esoteric Sorcerer of this school resides in the Origin Realm. They are friendly and offer many useful trades.
By completing the Esoteric Sorcerer's trial, you can obtain the mod's strongest accessory, the Rising Inolia Ring — an accessory comparable in power to Iron's Spells 'n Spellbooks' own Iron Crown.
Esoteric spells are divided into six branches: Spell, Spellblade, Familiar, Aura, Barrier, and Device.

Spells in the Spell branch generally take one or two seconds to cast, similar to mages in some MMORPGs who must stand still and chant before releasing their spells. You can bombard enemies with high-frequency spells such as Laser, unleash a long-chanting Finale for burst damage, or use other spells to charge the magic Cannon and blast your enemies to pieces.
The Spellblade branch focuses on melee combat. Some spells directly enhance the caster's melee attacks, causing them to deal bonus Esoteric damage on hit. Others release slash spells that launch sword waves and similar attacks to damage enemies.
The Familiar branch summons an untargetable black cat to assist you, but the cat only acts when you issue spell commands. At higher levels, the familiar can cast automatically and has a chance to copy spells cast by its master.
The Aura branch grants buffs centered on the caster to yourself and nearby allies, including but not limited to attack damage, attack speed, cast speed, and cooldown reduction.
The Barrier branch creates stationary zones that do not move with the caster, empowering allies inside them — for example, blocking damage or knocking enemies away.
The Device branch summons arcane devices to assist in combat, such as automatically launching magic missiles at enemies, or adding a follow-up attack after the caster deals damage.
The Esoteric Sorcerer can trade Ruined Books and other items that are difficult to renew in Iron's Spells 'n Spellbooks, as well as a special item that can increase your spellbook slots to 15.
The Rising Inolia Ring provides a huge amount of buffs, making it a true endgame accessory.
Additionally, the Rising Inolia Ring's model is compatible with the YSM mod and the Touhou Little Maid mod, and displays properly.
Project description from CurseForge.
Pick your setup
[ES]Esoteric Spells - Iron's Spells Addon by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
[ES]Esoteric Spells - Iron's Spells Addon versions and loaders
esoteric_spell-1.3.51.jar
3 Oct 2026
esoteric_spell-1.3.5.jar
30 Sept 2026
esoteric_spell-1.3.5-all.jar
30 Sept 2026
esoteric_spell-1.3.4.jar
30 Sept 2026
esoteric_spell-1.3.4-all.jar
27 Sept 2026
esoteric_spell-1.3.3-all.jar
26 Sept 2026
esoteric_spell-1.3.1-all.jar
22 Sept 2026
esoteric_spell-1.3.0-all.jar
21 Sept 2026
esoteric_spell-1.2.9-all.jar
21 Sept 2026
esoteric_spell-1.2.6-all.jar
17 Sept 2026
esoteric_spell-1.0.4-all.jar
24 Aug 2026
esoteric_spell-1.0.3-all.jar
21 Aug 2026
Looking for an older file? The official CurseForge project page is in Resources.