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Ars Ocultas Mod for Minecraft 1.20.1, 1.21.1

Ars Nouveau Integration for Occultism

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19 downloads
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Updated
Updated 26.10.2026

About the Ars Ocultas mod

Adds compatibility between Ars Nouveau and Occultism

Features :

  • Spirits can now be used from Containment Jars!
  • Spirits automatically pull items around them in a 7x7 area and process them.
  • Player can also right-click items on the jar to process them
  • Containment Jars containing spirits has an Item Capability attached. In other words, Items can be piped into the Jar! (pipes, hoppers, starbuncles all work!)
  • Janitor Spirits have a special functionality where it will automatically try pushing its contents into an inventory on top of the jar
  • New recipes to make progression easier
  • QoL changes :)

For a full overview, check the Ars Ocultas section of the Worn Notebook (Ars Nouveau Patchouli Guidebook)

Future :

Access Spirit GUI from with Jar Maybe mix familiar system and armor perks?

How to install Ars Ocultas

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 ars_ocultas-1.21.1-2.6.1.jar (83 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: Ars Ocultas 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
1.21.1NeoForgeArs Ocultas 1.21.1-2.6.183.1 KB 8
1.20.1ForgeArs Ocultas 1.20.1-1.2.2210 KB 11

FAQ

Which Minecraft versions does Ars Ocultas work on?

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

Is Ars Ocultas for Forge or Fabric?

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

Does Ars Ocultas need other mods?

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

Which Java does Ars Ocultas 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 Ars Ocultas safely?

On this page: the file ars_ocultas-1.21.1-2.6.1.jar (83 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: 92c5e7fcbf07141fc8bb0195e28ed9c3e77e1004.

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