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Cataclysm Bosses in Dungeon Realm by Karl Karlmann

Cataclysm Bosses in Dungeon Realm by Karl Karlmann

DATA PACK
Simple Datapack that places Cataclysm Bosses and Mobs inside Dungeon Realms
by Karl_Karlmann
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Updated Oct 14, 2026
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Adventure Miscellaneous Mod Support
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This is a compatibility data-mod that integrates the entities and structures from L_Ender's Cataclysm into the dungeon generation system of Dungeon Realms.

Technical Features

  • Arena Integration: Selected original Cataclysm boss structures were sliced and adapted to function as Dungeon Realms map_boss rooms. Sizes range from 3x3 to 6x6 chunks. Teleport offsets have been configured to align the player spawn point with the specific arena geometry.

  • Modified Spawner Tables: The default Dungeon Realms mob spawner lists (handled via Library of Exile) have been expanded. Dungeons will now spawn Cataclysm mobs corresponding to the dungeon's environment tag (e.g., Draugr in graveyards, Deeplings in sewers).

  • Format: The datapack is packaged as a standard Forge .jar file (lowcodefml) for standard installation. Place it in your mods folder.

Known Issues & Disclaimer

Please be aware that this project is provided "as is" and contains several flaws:

  • Incomplete Porting: Not all arenas or bosses from Cataclysm have been transferred into the dungeon system yet.

  • NBT Flaws: The .nbt structure files used for the arenas are partially flawed or unpolished. Slicing massive external structures into the strict chunk-grid of Dungeon Realms causes minor generation artifacts or cut-offs.

  • Balancing: Spawn weights and mob distribution might require further adjustments. There is generally room for optimization.

Dungeon_Cataclysm_Compat.zip
MC 1.20.1
Beta 2026-05-13 Get

Requirements & install

How to use this data pack in Minecraft
Mods needed
None, works in vanilla
Minecraft
1.20.1
Install folder
saves/<world>/datapacks

How to install data packs

  1. Download the data pack .zip file (do not extract it).
  2. New world: click Data Packs on the world creation screen and drop the .zip in. Existing world: open .minecraft/saves/<world>/datapacks.
  3. Put the .zip into the datapacks folder of the world (servers: world/datapacks).
  4. Run /reload in game (or rejoin the world) and check it with /datapack list.
Browse more: Data Packs for 1.20.1 All data packs

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