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GTBC's SpellLib/API Mod para Minecraft 1.20.1, 1.21.1

Un mod de librería y almacenamiento de código común para todos mis mods que contiene herramientas útiles para facilitarme la vida al crear complementos de ISS.

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Actualizado 21.10.2026

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A new library/API mod for all of my Iron's Spellbooks Addons!

This mod does not do ANYTHING on it's own!!

This mod is mainly created for Iron's Spellbooks add-on developers and myself included in mind... Since I have soo many ISS addons it's annoying to copy-paste every necessary things from one place to another whenever I start working on a new addon. Thus.. this library is created!

What this Library/API mod adds:

  • New Attributes like Spell Crit rate/DMG, Spell Projectile DMG, Spell Damage
  • Many pre-made patterned particle managers
  • AdvancedRandomImbuingCurio class to create curios that on right-click, imbues itself with specified random spells
  • Easy way to create flexible trades with AdvancedTrades class
  • Comfortable armor imbuement options with customizable slots and pre-imbued spells with AbstractImbueableArmorItem class
  • Geckolib Geo armor items, Geo magic sword items with GeoArmorItem & GeoMagicSwordItem classes
  • MultiAttributeCurio class that support multiple attributes
  • AdvancedSpell class for playing random animations and sounds on cast start-finish from a list, with a boolean to choose either play them on a order or not
  • CurioUtils class for easily checking wearing curio on a player
  • SummonCheckHelper class for checking summons in a radius with owner (I mainly use it for summon limit system on T.O Tweaks mod)
GTBC's SpellLib/API — captura 1

I&rsquo;ve also recently opened a Patreon to support the development of my mods. If you like my mods and want to support the development, it would mean a lot <3. There are perks for patrons that you can check out on the Patreon page (such as Alpha/Beta versions and Patreon specific dev-teasers).

License: All Rights Reserved (ARR)

I reserve all the rights to this mod. Please refer to the following list for what you can and cannot do with this mod.

You Can:

  • You can use this mod in any modpack you're playing or creating
  • You can use this mod as dependency for your addons (make sure to ask for github access to me)
  • You can develop datapacks for this mod

You Cannot:

  • Extract, reuse, or redistribute any assets or code from this mod
  • Modify, decompile, or re-upload this mod in any form
  • If I grant you GitHub access, it is for reference purposes only (to help you use the API correctly in your addons)
  • You are not allowed to copy, reuse, or adapt code from the repository for your own projects without my explicit approval

Credit:

  • The base of the screen shake system was referenced from Cataclysm (with permission) and further developed into a more advanced implementation for this mod

Why your project is Closed Source and How can we get access to it?

In the past, I had some unfortunate experiences with my college projects (personal matters) that left me with trust issues. Let&rsquo;s just say I&rsquo;ve developed a sort of trauma, and it&rsquo;s hard for me to trust people easily. Since I&rsquo;m fairly new to this community, I feel the need to be cautious. That&rsquo;s why my projects are currently closed-source. However, if I stay in the modding scene long enough and build more trust, I might consider making them open-source in the future.

For now, if you&rsquo;re a known modder or someone I personally know and you&rsquo;d like access to my projects for personal use or to help me directly, feel free to reach out. You can contact me on Discord or CurseForge, and I&rsquo;ll gladly provide collaboration access to my GitHub repositories.

Cómo instalar GTBC's SpellLib/API

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 1.20.1–1.21.1 on Forge or NeoForge automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Install Forge or NeoForge

    The loader must match the game version of the mod file, for example Minecraft 1.21.1. After installing it, a separate profile appears in your launcher.

  2. Download the file for your version

    In the version list above, pick the file gtbcs_spell_lib-2.2.0-1.21.1.jar (301 KB) for your game version and loader.

  3. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.

  4. Launch the loader profile

    Open “Mods” in the main menu: GTBC's SpellLib/API should be in the list.

Minecraft 1.21.1 runs on Java 21: with a different Java version the game may close right after launch.

Versiones

Con dependencias

MinecraftCargadorArchivoFechaAcciones
1.20.1Forgegtbcs_spell_lib-2.2.0-1.20.1287 KB 10
1.21.1NeoForgegtbcs_spell_lib-2.2.0-1.21.1301 KB 14
1.21NeoForgespell_lib-1.0.0-1.21.158.9 KB

FAQ

Which Minecraft versions does GTBC's SpellLib/API work on?

There are files for 1.21.1, 1.21, 1.20.1. The newest is 1.21.1.

Is GTBC's SpellLib/API for Forge or Fabric?

There are files for Forge: 1.20.1 and for NeoForge: 1.21–1.21.1. There are no files for Fabric: a mod for another loader will not start.

Does GTBC's SpellLib/API need other mods?

The author lists no required dependencies: the Forge or NeoForge loader is enough.

Which Java does GTBC's SpellLib/API need?

Minecraft 1.21.1 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.

Where can I download GTBC's SpellLib/API safely?

On this page: the file gtbcs_spell_lib-2.2.0-1.21.1.jar (301 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: 36cce8ab3117e89ae992a84a566d596709db2ffe.

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