Bulwark
by Chemthunder
Bulwark is a Fabric equipment mod for 1.21.1 whose radioactive crystals can be grown, crafted and placed as defensive homes.
What it does
Bulwark adds radioactive crystals that work as a defensive base element. Players grow them from Budding Klaproth and Bottled Ill Substance, which are made by using a glass bottle on Ill Substance vines and a bottle on a Budding Amethyst. Crystals must be collected with Silk Touch, and the remaining recipes cover the other blocks in the mod.
A placed Disrupter pushes nearby enemies away from itself, and certain blocks set above a Disrupter change its mode, so one device can be tuned to different defense behaviours. Some Disrupter modes push enemies upward instead. Eye of Ender and Sculk Catalyst recipes turn a Catalyst into an Ominous Catalyst, which is part of the crystal path.
Decorative Klaproth blocks include Klapmallows and Marshmallows, along with a new Glass variant that can be toggled to become a light-viewing block. Bulwark runs on client and server, so the server and every player need the mod. It is published for Fabric 1.21.1 only, under All rights reserved, and the source code is public without being open source. Required dependencies are AcornLib, Cardinal Components API, MidnightLib, Mod Menu and Trinkets.
Key features
Radioactive crystal defenses
Radioactive crystals serve as defensive homes, and their growth starts from Budding Klaproth.
Disrupter knockback
A placed Disrupter damages nearby enemies and pushes them away from its position.
Mode blocks
Specific blocks placed on top of a Disrupter switch it between modes, including upward pushes.
Decorative Klaproth blocks
Klapmallows, Marshmallows and a toggled Glass variant add decorative and light-viewing options.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 5
How it compares
Minable budding Amethyst is a Fabric mod for 1.21.1 – 1.21.11, server required with client optional, and its code is under the MIT License. Extra Enchants is a Fabric mod for 1.21.8 only, run on client and server, under All rights reserved. Crystal Caves 2 is a Fabric mod for 1.21.1, also client and server, under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Bulwark | Fabric | 1.21.1 | Client and server | 2026-07-21 |
| Minable budding Amethyst | Fabric | 1.21.1 – 1.21.11 | Server required, client optional | 2026-02-23 |
| Extra Enchants | Fabric | 1.21.8 | Client and server | 2026-03-13 |
| Crystal Caves 2 | Fabric | 1.21.1 | Client and server | 2026-03-30 |
Questions
Does Bulwark need Fabric API?
Does Bulwark have to be installed on the server?
Which game version does Bulwark support?
How are Klaproth crystals obtained?
In the catalog
Bulwark is one of 17,631 Equipment mods on ModsFinder, and one of 8,894 Equipment mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from Chemthunder
Similar mods
What the author says
Budding Klaproth will create Klaproth similar to Budding Amethyst, just only upwards. These crystals MUST be silk touched to collect. When placed, the Disrupter will damage all nearby enemies and push them AWAY from the Disrupter.
Official listing
- Modrinth page
- modrinth.com/mod/bulwark
- Owner
- Chemthunder
- Published
- 2026-07-21
- Updated on Modrinth
- 2026-07-21
- Facts verified
- 2026-10-15