
Modrinth · Minecraft mod
Incendium Legacy
A nether biome overhaul combined with challenging structures to conquer, unique weapons to obtain, and tricky mobs to defeat.
Quick answer
Which Incendium Legacy release should I use?
Incendium Legacy 5.3.5 targets 1.20, 1.20.1, 1.20.2 with datapack. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Incendium Legacy required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Incendium Legacy 5.3.5 need?
5.3.5. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Incendium Legacy without breaking your instance.
Built for Incendium Legacy 5.3.5. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 5.3.5. It targets 1.20, 1.20.1, 1.20.2 with datapack; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 5.3.5. It opens that exact file at the source.
About this project
What does Incendium Legacy add?
Incendium
Incendium is a datapack that completely revamps the nether, way more than what Minecraft did in the 1.16 Nether Update.

Notes
- Incendium has an optional resourcepack called Sparkles! This is not required, but it allows all items to have their own beautiful textures.
- Incendium is not compatible with Amplified Nether
- Do not add this to an existing nether - reset yours first, or use a new world
- View the structures and biomes per seed using jacobsjo's Minecraft Datapack Map
Description
Biomes
Incendium adds 8 unique biomes to the nether. Do you bravely venture through the perilous Quartz Flats, wander the mysterious Withered Forest, or battle your way through the steep Infernal Dunes? Each biome has a unique personality and story to tell. With unique block themes in each biomes, opportunities for new farms for technical players, 3D biomes, and stunning terrain, there is truly something for everyone.
Structures
To complement the lovely biomes, there are 9+ structures for you to explore and conquer. In the Ash Barrens, the Forbidden Castle stands forebodingly, with courageous Piglins defending its treasured loot - one of the largest and complex random structures in Minecraft! Alternatively, you can conquer the ominous Sanctum with its illagers defending dark secrets and strong weapons. The skeleton chef Torte defends his Quartz Kitchen, and the Withered Director his Nether Reactor. What will you conquer first?
Items
Every mob you defeat and structure you conquer has its reward - Incendium pays you handsomely with rich loot and custom weapons! Defeating the Hovering Inferno could earn you the Trailblazer - a flame-spewing bow. A high damage, but taxing Greatsword of Sacrifice hides within the Forbidden Castle's walls, along with the helpful Hefty Pickaxe. Or maybe you prefer to find the Hazmat Suit to protect you from all types of poisonous attacks. There are over 25 items to forge your own playstyle with!
Mobs
No datapack would be complete without its own mobs to fight you. The Toxic Heap is home of the agile Toxic Slimes, and the Withered Forest is haunted by the Restless Spirits. On the other hand, you could go on a rescue mission to save the Ghastling from the Abandoned Tower - in return, it will defend you from Ghasts. If none of this is challenging, you can summon the all-powerful Hovering Inferno boss for a difficult and dirty battle.
Project description from Modrinth.
Pick your setup
Incendium Legacy by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
5 loader builds26.1.2
5 loader builds26.1.1
5 loader builds26.1
5 loader builds1.21.11
5 loader builds1.21.10
5 loader builds1.21.9
5 loader builds1.21.8
5 loader builds1.21.7
5 loader builds1.21.6
5 loader builds1.21.5
5 loader builds1.21.4
5 loader buildsShowing the newest 12 of 29 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Incendium Legacy versions and loaders
5.5.0
Incendium_Legacy_26.2_v5.5.0.jar
10 Jul 2026
5.5.0
Incendium_Legacy_26.2_v5.5.0.zip
8 Jul 2026
5.4.12
Incendium_26.1_v5.4.12_UNSUPPORTED.zip
29 Mar 2026
5.4.12
Incendium_26.1_v5.4.12.jar
29 Mar 2026
5.4.11
Incendium_1.21.11_v5.4.11_UNSUPPORTED.zip
14 Mar 2026
5.4.11
Incendium_1.21.x_v5.4.11.jar
14 Mar 2026
5.4.10
Incendium_v5.4.10_1.21.11_UNSUPPORTED.zip
19 Dec 2025
5.4.10
Incendium_1.21.x_v5.4.10.jar
19 Dec 2025
5.4.9
Incendium_1.21.5_v5.4.9_UNSUPPORTED.zip
7 Oct 2025
5.4.9
Incendium_1.21.x_v5.4.9.jar
7 Oct 2025
5.4.8
Incendium_1.21.5_v5.4.8_UNSUPPORTED.zip
30 Jun 2025
5.4.8
Incendium_1.21.x_v5.4.8.jar
30 Jun 2025
Looking for an older file? The official Modrinth project page is in Resources.

