Blocks Spread
by STEAMPWRED
Blocks Spread is a Fabric minigame that makes placed blocks grow outward into nearby blocks, like sculk, until the world is overtaken.
What it does
A block placed with this mod starts spreading the way a sculk catalyst does, replacing other nearby blocks with copies of itself. Breaking the original block withdraws the spread and leaves air where it stood, while crouch-breaking it stops the spread and keeps the blocks already affected. Left unchecked, the spreading blocks can eventually take over a world. The mod is inspired by the Skippy T Element X and Sculk Mod ideas, and its author describes it as built by the YouTuber Frosty.
Most features are switched on and off with commands. Breaking one copy normally removes the connected copies, while sneak-breaking one preserves them, so the behavior can be controlled during play. A server running it needs every connecting player to have it too. Files are published for Fabric only, across 8 release versions 1.21.4 – 1.21.11, under All rights reserved, and the code is not open source.
Key features
Sculk-style spreading
A placed block begins to clone itself into adjacent blocks, spreading outward in the manner of a sculk catalyst.
Breaking withdraws spread
Breaking the original block removes the spread and replaces it with air, so the growth can be cleared.
Crouch-break to stop
Crouch-breaking the original block halts further spread and leaves the blocks it already affected in place.
Connected copy removal
Breaking one copy normally removes connected copies, while sneak-breaking one preserves them.
Command-based toggles
Most features are switched on and off with commands, so server owners can adjust the behavior.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players who want a spreading-block minigame or a cursed world event on a Fabric server, and server owners who want to toggle its features with commands.
Questions
Does Blocks Spread need Fabric API?
Does Blocks Spread have to be installed on both sides?
How are the spread features controlled?
In the catalog
Blocks Spread is one of 2,135 Minigame mods on ModsFinder, and one of 1,454 Minigame mods for Fabric. 19,862 mods support Minecraft 1.21.11.
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What the author says
A Fabric 1.21.4 mod built by Steampwred for YouTuber Frosty. This mod makes any placed block spread and clone itself like sculk. Breaking one clone normally removes all connected copies, but sneak-breaking preserves them. If left unchecked, the spreading blocks can eventually overtake your world.
Official listing
- Modrinth page
- modrinth.com/mod/blockspread
- Owner
- STEAMPWRED
- Published
- 2026-07-22
- Updated on Modrinth
- 2026-07-22
- Facts verified
- 2026-10-15