What L_Ender's Cataclysm works with.
| Platform | Java Edition |
|---|---|
| Loaders | Forge, NeoForge |
| Minecraft versions | 1.19.2, 1.20.1, 1.21.1, 1.21.5 |
| Environment | Client, Server |
L_Ender's Cataclysm is a Java Edition mod that fills the End, the Nether, and other pockets of the world with hand-built dungeons and boss fights modeled on Minecraft Dungeons encounters. It runs on NeoForge for 1.21.1 and Forge for 1.20.1, and every install needs both the client and the server running the mod together with its two required dependencies.
What L_Ender's Cataclysm adds
Players clear structures such as the Ender Guardian arena, the Harbinger's underground factory, and the Cursed Pyramid to reach named bosses. Beating one drops armor and weapon sets built around that specific fight, so gearing up means working through the mod's own dungeons rather than a flat crafting list.
- Ignis, a fire-themed boss guarding a Nether structure
- The Harbinger, a machine boss inside an underground factory
- The Ender Guardian and the Ender Golem, End-dimension encounters
- Later additions including the Howling Storm, the Cursed Pyramid, the Frosted Prison, and the Acropolis
Required dependencies and compatibility
L_Ender's Cataclysm will not launch without Curios API and Lionfish API, both listed as required dependencies on every current NeoForge and Forge build. Curios API is TheIllusiveC4's item-slot library and needs no extra setup beyond installing it alongside the mod. Lionfish API is mcl_ender's own shared library for this mod and does not have a separate MinecraftHub page yet.
Supported loaders and Minecraft versions
The mod's two branches diverged after 1.20.1. NeoForge carries active development and reached 1.21.1 with the build published August 22, 2026. Forge stayed on 1.20.1, with its most recent build published June 14, 2026. Neither Fabric nor Quilt has a release, so players on those loaders have no supported option.
- NeoForge: current build targets 1.21.1
- Forge: current build targets 1.20.1
- Earlier Forge builds also covered 1.19.2, now superseded
- No Fabric or Quilt build exists
How to install L_Ender's Cataclysm
- 1.Install NeoForge 1.21.1 or Forge 1.20.1, matching the branch you want to play
- 2.Download Curios API and Lionfish API for the same loader and version
- 3.Download L_Ender's Cataclysm itself from its Modrinth page
- 4.Place all three jar files in the mods folder on both the client and the server
- 5.Launch and confirm the mod loads before exploring a dungeon
L_Ender's Cataclysm mod showcase on NeoForge 1.21.1
Questions about L_Ender's Cataclysm.
5 questions
Does L_Ender's Cataclysm need Curios API?
Yes. Curios API is a required dependency on every current NeoForge and Forge build, alongside Lionfish API. The mod will not start without both installed on the client and the server.
Which Minecraft version does L_Ender's Cataclysm support?
NeoForge builds currently reach 1.21.1 and Forge builds stay on 1.20.1. The two branches diverged after 1.20.1, so pick the loader that matches the version you want to play.
Does L_Ender's Cataclysm work with Fabric?
No. The project only ships NeoForge and Forge builds. Players who want the mod's dungeons and bosses on Fabric or Quilt have no supported option yet.
Is L_Ender's Cataclysm safe to download?
The mod is distributed through its official Modrinth page under the mcl_ender account, licensed CC BY-NC-ND 4.0. Downloading from Modrinth avoids the rehosted copies and ad-gated mirrors that circulate for popular boss mods.
Where can I download L_Ender's Cataclysm?
The official source is the mod's Modrinth page, which lists separate NeoForge and Forge builds. MinecraftHub links to that page rather than hosting the file.
