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Mythic Compat Mod for Minecraft 1.21.1, 1.21

A small library mod to add recipe compatibilities for Mythic Upgrades.

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Updated 18.10.2026

About the Mythic Compat mod

☕ About Mythic Compat

  • Mythic Compat (Mythic Lib) adds cross upgrade recipes for Mythic Upgrades!
  • Thanks to Mythic Compat, you can upgrade your Topaz Chestplate to Ametrine Chestplate, same goes for every helmet, chestplate, leggings, boots, axe, sword or whatever!

How to install Mythic Compat

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 1.21–1.21.1 on Fabric or Quilt automatically.

  3. Launch the game

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

Manually

  1. Install Fabric or Quilt

    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 mythiclib-2.0+mc1.21(.1).jar (277 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: Mythic Compat 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.

Versions

With dependencies

MinecraftLoaderFileDateActions
1.21Fabric, QuiltMythic Lib 2.0 / 1.21(.1)277 KB

FAQ

Which Minecraft versions does Mythic Compat work on?

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

Is Mythic Compat for Forge or Fabric?

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

Does Mythic Compat need other mods?

The author lists no required dependencies: the Fabric or Quilt loader is enough.

Which Java does Mythic Compat 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 Mythic Compat safely?

On this page: the file mythiclib-2.0+mc1.21(.1).jar (277 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: ab5e1c30898c8d1f5e3c2b5baf68faa625e4401c.

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