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Hollowed Mod

by CraftKernel

Hollowed Mod, by CraftKernel, adds a spreading corruption to Fabric worlds for 1.21.1, along with hostile mobs that players must outrun or survive.

FabricClient and serverApache License 2.01.21.1

What it does

Creeping corruption spreads through the world and hollows out everything it touches. Its hostile mobs include the Hollowed Wanderer, which moves slowly and can be outrun when alone but alerts nearby Wanderers, and the Watcher, which freezes in place and only closes distance while a player is not looking at it. The Voidshade avoids light and actively flees toward darkness. A first Hollowed boss has three phases, combining melee slams and ranged void blasts, and the later phases appear only after the earlier ones are beaten.

The mod runs on the client and on the server, so both need it. It requires Geckolib, and Fabric API is listed as a dependency as well. Files are released under the Apache License 2.0 and the code is not open source. The only published build is the 0.1.0-alpha file for 1.21.1, dated 2026-07-03 on the alpha channel, and it is an early alpha.

Key features

  1. Spreading corruption

    Hollowing spreads across the world over time, and the status effect it applies is part of the threat players face.

  2. Five spawn eggs

    Spawn eggs for five of the mobs let players place them in creative play or on a server without waiting for natural spawns.

  3. Hollowed boss fight

    The First Hollowed is a three-phase boss, and players reach its later phases only after clearing the earlier ones.

  4. Placeholder models

    The remaining roster is implemented and spawns in the world, but it still wears placeholder models until final art arrives.

Compatibility

Latest build for each game version and loader.

No stable releases
Every published file is a beta or alpha build.
1.21.10.1.0-alpha
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

GeckolibA 3D animation library for entities, blocks, items, armor, and more!
Required

Questions

Does Hollowed Mod need Geckolib?

Yes. Geckolib is a required dependency, and it must be installed alongside Hollowed Mod on Fabric for 1.21.1.

Does the server need Hollowed Mod?

Yes. Servers that run it need every player to install it too.

Is Hollowed Mod finished?

No. The only file is the 0.1.0-alpha build, and the mobs still wear placeholder models while final art is pending.

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Froggo1.21.1AFKay1.20.1

What the author says

Something is spreading through the world, hollowing out everything it touches. This is an early alpha. The Hollowing itself and the Vein Crawler are fully realized; the rest of the roster is implemented and spawns in-world, but is still wearing placeholder models while the final art gets made.
CraftKernel, on the Modrinth page

Official listing

Owner
CraftKernel
Published
2026-07-03
Updated on Modrinth
2026-07-03
Facts verified
2026-10-15
Open on ModrinthCompare