BlockSpread: Viral Block Infection
Java mod listed for Minecraft 1.21. File opened and checked on 4 Oct 2026; downloads from the MC Java Mods app on Android.
Watch your blocks spread like a virus! This highly optimized plugin makes any placed solid block organically infect surrounding blocks, with customizable…
⬇ Download on Modrinth
🦠 BlockSpread
Ever wanted normal blocks to behave like the Sculk Catalyst? BlockSpread turns every solid block you place into an organic, spreading infection! Place a Diamond Block, Gold Block, or even Obsidian, and watch it consume the surrounding stone, dirt, and deepslate.
Perfect for minigames, custom SMP challenges, or just having fun reshaping your world!
✨ Features
- Organic Spreading Algorithm: Blocks spread naturally with randomized directional chances, creating a cool "vein" or "virus" look rather than a perfect square.
- Atmospheric: Features subtle Sculk charge sound effects as the blocks spread to make the infection feel alive.
- Fully Customizable: Adjust the spread speed and total lifespan of the infection directly in-game using commands.
- Insanely Optimized: Built strictly with server performance in mind.
- Disables chunk physics updates during the spread.
- Safely ignores complex blocks (
TileStateslike Chests, Furnaces, Hoppers) so it won't break your existing bases. - Hard-capped generation limits per tick to guarantee your TPS stays at 20.
🛠️ Commands & Permissions
/bs speed <seconds>- Set the interval speed of the spread (e.g., 0.2s)./bs duration <seconds>- Set the total lifespan of the infection (e.g., 10.0s).- Permission required:
blockspread.admin
⚙️ Technical Info
- Requirements: Spigot, Paper, or Purpur.
- Version: 1.21.x
- Setup: Just drop the
.jarinto yourpluginsfolder and restart!
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as BlockSpread.jar — drop this file into the mods folder
- Download size: 8 KB
- Download link checked 25 Oct 2026 — working
These come from our own check of the pack file, not from the source page.