BSE
by Entropy777
BSE adds a Bovine Spongiform Encephalopathy infection that spreads through cow-like mobs in a world, with phases that change how the mobs behave and what they become.
What it does
Infected mobs progress through numbered phases over time, and each phase changes their strength and resilience. Mobs that kill other entities pick up bonuses to health and defense scaled to the current phase number. Phase 7 is labeled the nominal final phase, though progression continues beyond it with new special effects. A bell shows the current infection phase, a redstone pulse can convert nearby ores, and drinking a specific item makes a player a member of the infection, so the infected mobs leave that player alone.
Most BSE mobs stay passive unless attacked, with four exceptions that act as the strongest entities of the infection. Once it begins, the infection also spreads through the air, and a mob that dies may spawn a cow at Phase 5 or later. Lower-tier mobs scale with the current phase. Natural evolution stops at a set point, and progression depends on infected mobs killing other entities. The mod requires Geckolib and Pehkui and is published for Forge and NeoForge, with files for 1.20.1 and 1.21.1, under All rights reserved.
Key features
Infection phases
Infected mobs move through numbered phases, and the current phase controls their attributes and behavior.
Infection spread
Mobs infected by BSE can convert others, and airborne transmission lets the infection reach more of the world.
Phase-based mob variants
Dying BSE variants may spawn matching BSE mobs, and new monsters appear as the infection advances, including Cownd Man, Cow Golem and Big Cow.
Parasite pillars and immunity
Low-level Cowtrees parasite pillars start appearing as the infection grows, and mobs gain immunity to attacks at Phase 1 with a chance to stop being targeted.
Gallery
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.
Use cases
Who it’s for: Players who want a mob-focused infection progression in Forge or NeoForge worlds. Both the server and every player need the mod, and Geckolib and Pehkui must be installed alongside it.
How it compares
Flora cows is an option for 1.20.1 – 1.21.4 that runs on client and server under All rights reserved and is not open source, so it covers a longer version range. Creeper Infection is server-side only, so players join without installing it, and it covers 1.20.1 – 1.21.5 under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| BSE | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2025-08-04 |
| Flora cows | Forge and NeoForge | 1.20.1 – 1.21.4 | Client and server | 2025-04-12 |
| Creeper Infection | Forge and NeoForge | 1.20.1 – 1.21.5 | Server-side only | 2025-06-02 |
Questions
Which dependencies does BSE need?
Does BSE have to be installed on both sides?
Which game versions does BSE support?
In the catalog
BSE 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 Entropy777
Similar mods
What the author says
Cows have developed strange mutations resembling mad cow disease, yet not exactly the same. They are silently and imperceptibly spreading across the entire world... You’re free to drop this into any modpack—no need to ask or get permission—and recording videos is more than welcome.
Official listing
- Modrinth page
- modrinth.com/mod/bse
- Owner
- Entropy777
- Published
- 2025-08-04
- Updated on Modrinth
- 2025-08-04
- Facts verified
- 2026-10-15