Lexter's Cataclysm
by Lexter
Lexter's Cataclysm brings new weapons, dungeons, structures and advancements to vanilla survival worlds, built as a datapack that draws on the boss-and-dungeon style of earlier cataclysm-themed packs.
What it does
The add-on lists a set of custom weapons, including a netherite sword that fires a blaze-rod effect at mobs in front of the player and damages anything within a radius of two blocks. Other items use crafting grids built from gold nuggets, purpur blocks, amethyst shards, redstone, iron ingots and obsidian, and a mechanical rocket launcher is included among them.
Structures are placed in the world: a small structure holds a large amount of loot protected by two shulkers, and a bigger one has a secret room with a main chest, an elytra and a trading villager. Villages are a good place to find food. Advancements reward collecting dyes and the new custom items.
The mod is packaged as a datapack and requires a resource pack, so it cannot be installed as a loader-based mod. Players who use JEI can look up the recipes. Files are published for Fabric, Forge, NeoForge and Quilt, and every build targets 1.21.5 – 1.21.10 under a Creative Commons license that prohibits commercial use and derivatives.
Key features
Custom weapons
Swords and launchers add damage effects, such as a flame strike and a ring of darkness that teleports nearby entities.
Wither and slowness effects
Some weapons apply wither, weakness or slowness to mobs they hit, with the teleport radius varying between weapons.
Dungeon structures
Small and large structures add loot rooms, guarded chests and a trading villager to the world.
Advancements
A set of advancements tracks dye collection and the discovery of the new custom items.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners and survival players who want new weapons and structures inside the vanilla game, and who can install a resource pack alongside the datapack.
How it compares
Mowzie's Cataclysm is a separate mod for Forge and NeoForge, built as a client and server mod for 1.20.1 – 1.21.11 under All rights reserved. Reliquified L_Ender 's Cataclysm is NeoForge only, for 1.21.1, also client and server and not open source. Cataclysm & BetterCombat - Compatibility is for Forge and NeoForge, with server required and client optional, covering 1.20.1 – 1.21.1.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Lexter's Cataclysm | Fabric, Forge, NeoForge and Quilt | 1.21.5 – 1.21.10 | Server required, client optional | 2026-01-12 |
| Mowzie's Cataclysm | Forge and NeoForge | 1.20.1 – 1.21.11 | Client and server | 2026-09-17 |
| Reliquified L_Ender 's Cataclysm | NeoForge | 1.21.1 | Client and server | 2025-08-13 |
| Cataclysm & BetterCombat - Compatibility | Forge and NeoForge | 1.20.1 – 1.21.1 | Server required, client optional | 2025-12-18 |
Questions
Does Lexter's Cataclysm need a loader?
Does the server need the mod?
Which game versions does the datapack support?
In the catalog
Lexter's Cataclysm is one of 17,631 Equipment mods on ModsFinder, and one of 8,894 Equipment mods for Fabric. 15,569 mods support Minecraft 1.21.10.
More from Lexter
Similar mods
What the author says
DO NOT use Mods like JEI - They Wont work, because the Mod is just a Packaged Datapack! There Are many Achievements based on the Vanilla Game like Collecting all dyes.
Official listing
- Modrinth page
- modrinth.com/mod/lexters-cataclysm
- Owner
- Lexter
- Published
- 2025-06-18
- Updated on Modrinth
- 2026-01-12
- Facts verified
- 2026-10-15