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Pyrellium

The vanilla+ nether overhaul

FabricNeoForge
Loaders
FabricNeoForge
Downloads on Modrinth
13.8K
Followers on Modrinth
41
versions
40
Updated
October 8, 2026Oct 8
Published
in 2025
Crystal forest · swipe

At a glance

Runs on Fabric and NeoForge
For Minecraft 1.21.1, 1.21.11 …
Needed in the game and on the server
Latest version — 0.4.1-1.21.1-neo from October 8, 2026
License CC-BY-4.0 — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.20–1.20.2, 1.21.1, 1.21.11

The Nether has always been dangerous... but it's never been this alive.

Pyrellium

Pyrellium is a content-rich expansion mod that introduces 9 brand new biomes, seamlessly integrated with the vanilla Nether for a natural and immersive experience. Whether you're an explorer, builder, or survivalist, Pyrellium offers new challenges and rewards deep within the fiery realm.

Description

Flaming Forests

Discover blazing biomes, and obtain new spoils. But watch out, even the flora is out to harm you.

Burning Grove

Icy Depths

Find chilling places where frostbite meets fire. These treacherous frozen lands are as beautiful as they are deadly.

Frostburn Valley

Spider Sanctuaries

Venture into eerie caverns where intelligent spiders spin homes of silk and secrets. Tread carefully. You're not alone.

Infested valley

Calming hopes

Not every biome is deadly, venture into the crystal forest to enjoy lands of beauty. and take a break from the danger.

Crystal forest

And More!

Frequently Asked Questions

Forge?

Pyrellium is fully compatible with sinytra connector, use that for playing pyrellium on forge.

Since version 0.4.0, Pyrellium does have a native neoforge version for minecraft 1.21.1

Is this compatible with X mod?

Pyrellium was built with compatibility in mind. It works alongside all major Nether mods and fits naturally into both vanilla and modded environments.

Will you be adding more biomes or features?

Pyrellium is currently in beta, this means more features are on the way. Adding more biomes itself will be unlikely, but stay tuned for new mobs, items, and other features.

Hey this looks a lot like Lankasters Nether.

Yes. Pyrellium started as Lankasters Nether, but eventually grew to big to be just a datapack, and it was decided to switch over to making a mod. Lankasters Nether is still available as it's own project for archiving purposes, but it is recommended where possible to use Pyrellium instead.

FAQ

How to install Pyrellium?

Install Fabric for your Minecraft version, download Pyrellium for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Pyrellium support?

Pyrellium has builds for Minecraft 1.20–1.20.2, 1.21.1, 1.21.11.

Is Pyrellium needed on the server?

Needed in the game and on the server

License and source
Creative Commons Attribution 4.0 Internationalfree to share with credit to the author and the license
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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