How do I install The Duality?

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 The Duality work with?

The listing gives Minecraft 1.20.3, 1.20.4. This is the version stated by the author or source site, not something we verified ourselves.

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The Duality

by MonoCode · on Modrinth

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 1.20.3–1.20.4Newest
Minecraft 1.19–1.20.2

⬇ Download for 1.20.3–1.20.4 ⬇ Download for 1.19–1.20.2

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 →

The Duality

This custom challenge forces you to stay underground (below y:60) during nighttime, and above ground (above y:50) during daytime. The area between those y-levels is always safe. To break this curse, you have to defeat 2 custom bosses, the Sun Emperor and the Void King. They may look familiar, but do not underestimate them, they are a force to be reckoned with.

Walkthrough (Mild Spoilers)

Sun Emperor To summon the Sun Emperor, you need to craft an arrow of light using and Arrow and surrounding it with Sun Essence, which is dropped twice from iron golems. You then need to shoot it upwards at daytime and the Sun Emperor will appear. Void King To summon the Void King, you need to craft a diamond block, which now only consists of 4 diamonds. When you break it, you will get a Void Crystal, which will summon the Void King when thrown onto bedrock.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.20.3, 1.20.4
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 The Duality 1.20.4 Data Pack.zip
Download size: 14 KB
Download link checked 8 Sept 2026 — working

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

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