ModsJava
Doom Block Mod (26.1.2, 1.21.1) – Build Lethal Obstacle Courses
Java mod listed for Minecraft 1.21. Download on the author's site.
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Doom Block Mod adds lethal hazard blocks that take down players on contact. Stepping onto one of these surfaces deals 500 points of damage that ignores armor and protective potion buffs. The mod turns simple hallways into deadly obstacle courses and tension-filled challenge runs.
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Features:
- Lethal Contact: Stepping on a trap block delivers 500 damage and bypasses standard defenses.
- Redstone Activation: Levers, buttons, and sensors trigger specific trap reactions on demand.
- Game Mode Separation: Creative mode removes blocks cleanly while Survival mode drops loot and items.
- Snow Accumulation: Snowing blocks generate rising layers of snow underfoot over time.
- Rain Effects: Raining blocks drop water particles overhead when activated.
- Tuned collision boxes detect foot contact at the exact edge of the block.
- Colorful variants let you blend traps into different floor designs and map themes.
- Invisible trap blocks catch trespassers completely off guard.
Trap Block Types:
- Colored blocks: Red, Orange, Yellow, Lime, Blue, Cyan, Purple, Magenta, Pink, and White versions for color-coded puzzles.
- Weather blocks: Fire, Raining, and Snowing blocks with active environmental particle effects.
- Invisible blocks: Concealed hazard blocks without visible shadows or textures.
Commands:
/doomblock <x> <y> <z> <boolean>: Sets up a custom trap zone across specific coordinate ranges with an active or inactive state.
Configuration:
blockKillsEntities: Toggles whether the hazard blocks kill mobs and players or remain harmless during testing.
How to Use:
- Place a hazard block directly into the floor or conceal it beneath a trap path.
- Connect a redstone wire, lever, or pressure plate to power the block if you want remote activation.
- Use the
/doomblockcommand to define a wider danger zone across multiple coordinates. - Test your trap layout safely by toggling the
blockKillsEntitiesrule off before running the challenge.
Screenshots:




Doom Block Mod Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on the file's original source — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Doom Block Mod (26.1.2, 1.21.1) – Build Lethal Obstacle Courses is a free Minecraft Java mod. Compatible with Minecraft 1.21.1. Download it and open it directly in the game.