Blood and Deepslate
Blood and Deepslate makes mining riskier underground, with coal dust clouds, depth-based hazards and a molybdenum ore that supplies gas mask and hardhat crafting.
What it does
Mining coal can release a cloud of coal dust, and near a fiery block the cloud can explode violently. Going below Y level 4 in the overworld applies mining fatigue, slowness and a gas mask requirement, and below Y level -28 the effects grow to mining fatigue II, slowness II and nausea. Suffocation damage follows when no gas mask is worn. The mod is built as a gradual progression step for players who want more challenge than vanilla underground mining offers.
Molybdenum ore and deepslate molybdenum ore generate between Y -63 and Y -12. Mining them drops raw molybdenum, which is smelted into molybdenum ingots and molybdenum oxide. The ingot and oxide serve as crafting ingredients for the gas mask and hardhat, and the gas mask filter is a required part of the gas mask recipe. The mod needs Forge or NeoForge and runs on client and server, so both the server and every player must install it. It is released under the AFL-3.0 license and is not open source.
Key features
Coal dust clouds
Mining coal has a 50% chance to create a cloud of coal dust, which fades over time.
Depth-based hazards
Lower layers of the overworld apply fatigue, slowness and nausea, with suffocation damage if no gas mask is worn.
Molybdenum ore
Molybdenum ore and deepslate molybdenum ore generate between Y -63 and Y -12, dropping raw molybdenum.
Gas mask and hardhat
Molybdenum oxide and ingots are used in gas mask and hardhat crafting, with the filter required for the mask.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Harder underground progression
Players who want mining to carry more risk can rely on the gas mask before going below Y level 4.
Early gear crafting
Molybdenum ore is the source for the materials needed to make protective equipment.
Who it’s for: Players who want gradual underground challenges in survival play, and server owners who want to add a layer of mining hazards to a world.
How it compares
Deepslate Tools adds deepslate-based tools for Forge and NeoForge across 1.20.1 – 1.21.5, under the MIT License, and runs on client and server. Glaiden's gas mask mod is Forge only, for 1.20.1, under All rights reserved, and is a gas mask mod without the wider underground hazards.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Blood and Deepslate | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-05-06 |
| Deepslate Tools | Forge and NeoForge | 1.20.1 – 1.21.5 | Client and server | 2025-04-03 |
| Glaiden's gas mask mod | Forge | 1.20.1 | Client and server | 2024-03-09 |
Questions
Does Blood and Deepslate need to be installed on the server?
Which loaders and versions does Blood and Deepslate support?
Where does molybdenum ore generate?
In the catalog
Blood and Deepslate is one of 17,631 Equipment mods on ModsFinder, and one of 9,216 Equipment mods for Forge. 32,366 mods support Minecraft 1.21.1.
More from RealSkullface
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What the author says
Hello, player! Welcome to Blood and Deepslate, a mod for those seeking more challenge and a more gradual progression in Minecraft! Come try this little expansion to the vanilla gameplay yourself. Hope you enjoy!:D
Official listing
- Modrinth page
- modrinth.com/mod/blood-and-deepslate
- Owner
- RealSkullface
- Published
- 2023-10-09
- Updated on Modrinth
- 2026-05-06
- Facts verified
- 2026-10-15