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Wither Fortress│凋零堡壘

by Special_TT

Wither Fortress adds a Nether structure whose bedrock castle is guarded by a Wither that roams its grounds and cannot be summoned through multi-block structures.

FabricForgeNeoForgeQuiltServer required, client optionalMIT LicenseOpen source1.21.7 – 1.21.11

What it does

The Wither Fortress generates in the Nether as a bedrock complex built around a main castle. Roads run out from the castle in straight, curved and forked forms, and each road that terminates ends at a treasure chest tower. Along some bedrock walls a streetlight occurs in about 5% of cases, crowned with a bedrock lamp. Inside the castle area, a Wither roams while idle, and four gates lead outwards from the grounds. A Wither that leaves the fortress is teleported back to the main castle when it goes idle.

The fortress includes summoning towers, which are specialized chest towers. Each Wither Fortress generates three of them. In place of the original chest slots, these towers carry two-block-high bedrock pillars crowned by a skull frame, and setting a Wither Skull into that frame activates the tower.

The mod needs Bedrock Crafter, which must be installed on the server. Wither Fortress is open source under the MIT License and runs on the server while players need nothing extra. Files are published for Fabric, Forge, NeoForge and Quilt, and the 1.21.7 – 1.21.11 range is covered by five release versions, with 1.1.0 as the latest file. It is also available as a data pack.

Key features

  1. Bedrock castle

    A main castle of bedrock forms the centre of the fortress, with four outward gates.

  2. Road layouts

    Straight, curved and forked roads connect the structures, ending at treasure chest towers.

  3. Summoning towers

    Three summoning towers appear in each fortress, with skull frames that activate them when a Wither Skull is placed.

  4. Treasure chest towers

    Stair-accessed towers at road ends hold a chest with rich loot at the top.

Compatibility

Latest build for each game version and loader.

1.21.111.1.0+1.21.9+mod1.1.0+1.21.9+mod1.1.0+1.21.9+mod1.1.0+1.21.9+mod
1.21.101.1.0+1.21.9+mod1.1.0+1.21.9+mod1.1.0+1.21.9+mod1.1.0+1.21.9+mod
1.21.91.1.0+1.21.9+mod1.1.0+1.21.9+mod1.1.0+1.21.9+mod1.1.0+1.21.9+mod
1.21.81.1.0+1.21.7+mod1.1.0+1.21.7+mod1.1.0+1.21.7+mod1.1.0+1.21.7+mod
1.21.71.1.0+1.21.7+mod1.1.0+1.21.7+mod1.1.0+1.21.7+mod1.1.0+1.21.7+mod
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Bedrock CrafterAllows you to craft bedrock and new bedrock building blocks.
Required

Use cases

Who it’s for: Server owners and adventure map makers who want Nether structures with a fixed boss area and loot towers.

How it compares

Full comparison

Simple Wither Buff is server-side for 1.21.4 – 1.21.5 and licensed under the GNU Affero General Public License v3.0 only, so it is not open source under the same terms. Ember's Castles And Keeps is server-side only for 1.20.1 – 1.21.4 and is released as All rights reserved. Japanese Castle - Structure ✅ covers 1.21 – 1.21.11 with All rights reserved, while Nether Start/Wither Challenge is limited to 1.21.4 under the MIT License.

ModLoadersGame versionsEnvironmentUpdated
Wither Fortress│凋零堡壘Fabric, Forge, NeoForge and Quilt1.21.7 – 1.21.11Server required, client optional2026-05-01
Simple Wither BuffFabric, Forge, NeoForge and Quilt1.21.4 – 1.21.5Server required, client optional2025-03-27
Ember's Castles And KeepsFabric, Forge and NeoForge1.20.1 – 1.21.4Server-side only2026-07-24
Japanese Castle - Structure ✅Fabric, Forge, NeoForge and Quilt1.21 – 1.21.11Server required, client optional2025-10-03
Nether Start/Wither ChallengeFabric, Forge, NeoForge and Quilt1.21.4Server required, client optional2025-01-19

Questions

Does Wither Fortress require Bedrock Crafter?

Yes. Bedrock Crafter is a required dependency and must be installed on the server alongside Wither Fortress.

Which loaders are supported?

Files are published for Fabric, Forge, NeoForge and Quilt, all for 1.21.11 in the latest release.

Does the mod need to be installed on the client?

No. It is required on the server and optional for players.

In the catalog

Wither Fortress│凋零堡壘 is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 19,862 mods support Minecraft 1.21.11.

World generation mods8,515Fabric modsMods for 1.21.1119,862

More from Special_TT

All projects
Villagers Regeneration│村民回復1.21 – 1.21.11Arrow Ding│箭矢叮1.21 – 1.21.11Damage Optimization│傷害優化1.21 – 1.21.11TT's Lib│特特的庫1.21.9 – 1.21.11Mobs Active Ride│生物主動騎乘1.21 – 1.21.11Doesn't This Count as Being Burned to Death?│這不算燒死嗎？1.21 – 1.21.11

Similar mods

Biomes O' Plenty1.7.10 – 26.3Terralith1.18.2 – 26.3YUNG's Better Nether Fortresses1.18.2 – 26.1.2Dungeons and Taverns1.19 – 26.3Yeetus Experimentus1.18.2 – 26.3Towns and Towers1.18.2 – 26.3

What the author says

⚠️ This data pack requires the server-side mod Bedrock Crafter.│該資料包需要伺服器端模組Bedrock Crafter。 ⚠️ # Function│功能 - In the Nether, Wither Fortresses made of bedrock will generate, which include a main castle, roads, chest towers, and summoning towers.|在下界會生成由基岩組成的凋零堡壘，其中包含主堡、道路、寶箱塔、召喚塔。 - Main Castle: The area where the…
Special_TT, on the Modrinth page

Official listing

Owner
Special_TT
Published
2026-02-02
Updated on Modrinth
2026-05-01
Facts verified
2026-10-15

Tags

Game mechanicsMobsWorld generationAdventure
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