How do I install Akoi Meexx: Catalysis?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does Akoi Meexx: Catalysis work with?

The listing gives Minecraft 1.21.1, 1.21.2, 1.21.3, among others. This is the version stated by the author or source site, not something we verified ourselves.

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DatapacksJava

Akoi Meexx: Catalysis

by akoimeexx · on Modrinth

An in-world block manipulation datapack designed to introduce additional gameplay mechanics for Slimes and Magma Cubes.

Which Minecraft do you have?

Every version of the game needs its own build. Pick yours, then download — the wrong build installs fine and then does nothing in the game. This mod is built for Data pack only.

Minecraft 1.21.1–1.21.4Newest
Minecraft 1.18–1.18.2

⬇ Download for 1.21.1–1.21.4 ⬇ Download for 1.18–1.18.2

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

Catalysis

Catalysis is a datapack that allows slimes and magma cubes to clean and oxidize copper blocks they land on top of, providing an in-game mechanic to increase the speed at which players can convert copper blocks to different states.

This pack was originally written for a 1.18 world and remains largely unchanged, with the exception of targeting more block types and swapping mob behaviors to have slimes be the 'cleaners' and magma cubes being the 'dirtiers' of the copper blocks.

Features

Sentence above says it all.

Future Planned Features

In-game advancements for nearby players when a block conversion by catalysis occurs
Any additional copper block additions to be added.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21.1, 1.21.2, 1.21.3
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.

Verified by MCModsHub

Downloads as Catalysis.datapack.zip
Download size: 9 KB
Download link checked 22 Aug 2026 — working

These come from our own check of the pack file, not from the source page.

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