Fabric Reinforced Obsidian
Fabric Reinforced Obsidian adds a wither-proof obsidian variant that explosions cannot damage, along with slabs, stairs, walls and two reinforced glass blocks.
What it does
Reinforced obsidian blocks let a player build a safe Wither cage with only a few blocks, and they can stand in for the bedrock nether roof below a Wither where bedrock is not available. Outside that use, the block is needed only where a wither-resistant surface is the goal. Slabs, stairs and walls share the same function as their full-block counterpart.
The mod adds reinforced glass and reinforced tinted glass, both wither-resistant variants of vanilla glass. Reinforced iron bars can take the place of the iron ingot in the center slot of the vanilla iron bar recipe, and the crafting path to reinforced obsidian uses a netherite ingot. The server and every player need the mod installed. It is published for Fabric only, for 1.20.1 – 1.21.8, and the license is Creative Commons Attribution 4.0, which means the mod is not open source; its source code and issue tracker are public.
Key features
Wither-proof obsidian
Reinforced obsidian cannot be damaged by explosions or by a Wither, which is the basis of the block set.
Full block set
The reinforced obsidian family includes slabs, stairs and walls in matching form, and the set also covers reinforced glass and reinforced tinted glass.
Reinforced iron bars
Reinforced iron bars can replace the iron ingot in the center slot of the vanilla iron bar recipe.
Recipes for the set
Crafting reinforced obsidian takes a netherite ingot, four iron ingots and four reinforced iron bars; the glass variants draw on obsidian, amethyst shards and reinforced iron bars instead.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x6 of 6 versions with builds
1.20.x3 of 3 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Movable Reinforced Deepslate is open source under the MIT License and is server required with the client optional, for 1.19 – 1.21.8 on Fabric. Instant Wither Spawn is client and server, not open source, under the MIT License, and covers 1.20.5 – 1.21.11 on Fabric. Reinforced Tools is open source under the MIT License and also runs on NeoForge and Quilt, for 1.21 – 1.21.1. This mod is client and server, not open source, under Creative Commons Attribution 4.0, and covers 1.20.1 – 1.21.8 on Fabric.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Fabric Reinforced Obsidian | Fabric | 1.20.1 – 1.21.8 | Client and server | 2025-07-23 |
| Movable Reinforced Deepslate | Fabric | 1.19 – 1.21.8 | Server required, client optional | 2024-08-24 |
| Instant Wither Spawn | Fabric | 1.20.5 – 1.21.11 | Client and server | 2026-01-27 |
| Reinforced Tools | Fabric, NeoForge and Quilt | 1.21 – 1.21.1 | Client and server | 2024-12-29 |
Questions
Does Fabric Reinforced Obsidian need Fabric API?
Does the server need the mod?
Which game versions have files?
In the catalog
Fabric Reinforced Obsidian is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 17,695 mods support Minecraft 1.21.8.
More from globalista-dev
Similar mods
What the author says
This mod adds a block called reinforced obsidian, that can't be broken by the Wither. It also adds reinforced bars used to create the reinforced obsidian. The block itself comes from EnderIO and although the textures are similar, I recreated them in paint.net myself. This also means that they are subject to change…
Official listing
- Modrinth page
- modrinth.com/mod/fabric-reinforced-obsidian
- Owner
- globalista-dev
- Published
- 2023-09-23
- Updated on Modrinth
- 2025-07-23
- Facts verified
- 2026-10-15