Sulfur Depths
by Benj1kus
Sulfur Depths adds a sulfur-themed underground biome called Boiling Caves, along with new blocks, a sulfur slime mob and a set of hazardous materials.
What it does
The Boiling Caves biome generates beneath the surface and spawns sulfur lakes at the bottom. Several block types appear in it, including Cinnabar Sulfur, which can be smelted on a campfire into a more orange, more durable heated variant. Light-emitting blocks and an Amethyst block that rings when struck are also part of the set.
The mod introduces a sulfur slime with its own mechanics: it can be pushed toward mobs or players, and the damage it deals depends on the item used to strike it, including enchantments. Anvil Obsidian makes an object heavy so that a fast fall deals damage like an anvil. Magma blocks ignite nearby entities, and cactus blocks hurt everything around them. Emerald blocks lure villagers and gold blocks lure piglins.
Sulfur Depths is published for Forge and NeoForge across 3 release versions, 1.20.1 – 1.21.1, and runs on client and server, so the server and every player need it. The code is not open source, and the mod is released under All rights reserved. Pointed Dripstone and wool types round out the block set.
Key features
Boiling Caves biome
An underground biome with sulfur lakes at its base, generated in the world as new terrain.
Sulfur slime mob
A slime that can push mobs and players, with damage that varies by the item used to strike it.
Anvil Obsidian
A heavy block that deals anvil-like damage when it falls from a height at high speed.
Lure and damage blocks
Emerald and gold blocks lure villagers and piglins, while magma and cactus blocks harm nearby entities.
Cinnabar Sulfur variants
Cinnabar Sulfur can be crafted into decorative blocks or smelted on a campfire into a heated, more durable form.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Simple Sulfur is a Forge and NeoForge mod for 1.19.2 – 1.21, also client and server and under All rights reserved, so it covers an older version range. Slime Jump is Forge, Fabric and NeoForge for 1.20.1 – 1.21.1, with the same environment and license, and focuses on slime movement rather than biomes. Dripstone Craft is server-side required with an MIT License and spans 1.21 – 26.3 on Fabric as well.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Sulfur Depths | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-04-10 |
| Simple Sulfur | Forge and NeoForge | 1.19.2 – 1.21 | Client and server | 2024-08-05 |
| Slime Jump | Fabric, Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2025-05-22 |
| Dripstone Craft | Fabric, Forge, NeoForge and Quilt | 1.21 – 26.3 | Server required, client optional | 2026-10-07 |
Questions
Does Sulfur Depths need to be installed on the server?
Which loaders does Sulfur Depths support?
Does the sulfur slime work the same on every version?
In the catalog
Sulfur Depths is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 32,366 mods support Minecraft 1.21.1.
More from Benj1kus
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What the author says
Sulfur Depths - this mod adds a new biome to the game - the Boiling Caves. Cinnabar and Sulfur - which can be crafted into other decorative blocks using a workbench or stone cutter. Additionally, if you smelt any sulfur block using a campfire or fire, it will turn into a heated sulfur variant (more orange and more…
Official listing
- Modrinth page
- modrinth.com/mod/sulfur-depths
- Owner
- Benj1kus
- Published
- 2026-04-06
- Updated on Modrinth
- 2026-04-10
- Facts verified
- 2026-10-15