Wither Spawn Fix W.S.A. Compatible
by bo_bo
Wither Spawn Fix W.S.A. is a Forge and NeoForge patch that stops small blocks from blocking Wither spawns while keeping Wither Spawn Animation working.
What it does
Snow layers, small plants, flowers, flower pots, buttons and carpets placed around a Wither altar can stop the spawn from completing. This mod resolves that interference so the Wither still forms when the altar is built correctly, even where those blocks sit nearby.
The original Wither Spawn Fix does not work alongside Wither Spawn Animation, and running both together breaks the animation completely. The compatible variant keeps the animated altars working and still applies the spawn fix. Wither Spawn Animation is required, and the two mods should not be combined with the original Wither Spawn Fix.
Files are published for Forge and NeoForge, covering 1.20.1 and 1.21.1 with the 1.1.0 release on each loader from 2025-11-11. The mod is marked as client and server, so both the server and players run it. The code is under All rights reserved and is not open source. Its public issue tracker is the only public link listed.
Key features
Spawn fix for small blocks
Snow layers, buttons, carpets and small plants no longer stop a Wither from spawning on an altar.
Animated altars kept working
The spawn fix stays active on animated Wither altars built with Wither Spawn Animation.
Conflict with original fix avoided
It replaces the original Wither Spawn Fix, which breaks the animation when both are installed.
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 1
Incompatible 1
Use cases
Animated Wither altars on a server
Server owners running Wither Spawn Animation can add this mod so decorations near an altar do not block the spawn.
Who it’s for: Server owners and players who use Wither Spawn Animation and build decorative spaces around Wither altars.
How it compares
Naturally Spawning Withers is a Forge and NeoForge mod for 1.20.1 – 1.21.5 that is server-side only and not open source. Wither Fix is a Fabric, Forge, NeoForge and Quilt mod for 1.13 – 1.21.10 where the server is required and the client is optional, under All rights reserved. Neither is named as a replacement for the animation-compatible spawn fix in this card.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Wither Spawn Fix W.S.A. Compatible | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2025-11-11 |
| Naturally Spawning Withers | Forge and NeoForge | 1.20.1 – 1.21.5 | Server-side only | 2025-05-27 |
| Wither Fix | Fabric, Forge, NeoForge and Quilt | 1.13 – 1.21.10 | Server required, client optional | 2025-10-29 |
Questions
Does Wither Spawn Fix W.S.A. require Wither Spawn Animation?
Can it run together with the original Wither Spawn Fix?
Which game versions does the mod support?
In the catalog
Wither Spawn Fix W.S.A. Compatible is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 32,366 mods support Minecraft 1.21.1.
More from bo_bo
Similar mods
What the author says
The Wither Spawn Fix mod solves a common problem where small blocks like snow layers, buttons, carpets, and plants interfere with the Wither’s altar and stop it from spawning. However, the original fix isn’t compatible with Wither Spawn Animation, and using both together breaks the animation completely. This mod…
Official listing
- Modrinth page
- modrinth.com/mod/wither-spawn-fix-wsa-compatible
- Owner
- bo_bo
- Published
- 2025-11-10
- Updated on Modrinth
- 2025-11-11
- Facts verified
- 2026-10-15