Phayriosis Parasite Infection
by Monbox
Players who want a slow-moving outbreak can add Phayriosis Parasite Infection, a Forge mod in which a parasite infestation grows through phases over time.
What it does
Phayriosis splits its infestation into several phases, and each phase raises the strength of the creatures that spawn and the speed at which they infect blocks. Early on, basic infectors and converted mobs appear in small groups. At higher phases, stronger creatures spawn more often, and the infection eventually reaches the point where it can alter the world. A command reveals the current phase, and an hourglass item lets players change it.
The parasites follow their own logic. Infectors gather in groups of four, and converted mobs in groups of one. Corpses cannot advance a phase on their own; instead they grow into nodes that hatch stronger parasites. Most nodes evolve into perennial parasites, which stay in one place and summon more creatures, and those perennials can defend themselves. Nest beacons and nest networks link these nodes, and a nucleus at the end of the chain starts slowly converting the entire world.
The mod requires Geckolib and Pehkui, and JEI is listed as a requirement as well. Crisis Contract requires Phayriosis Parasite Infection. Primordial reactors can be crafted to permanently clear sections of the infestation, and a config command can turn the phayriosis off. Files are published for Forge only, for 1.20.1, with 0.0.7 as the latest file. Every player and the server need a copy of the mod.
Key features
Phased infestation
The infection moves through phases that increase over time, bringing stronger creatures and faster block infection.
Parasite evolution
Corpses and nodes grow into networking nodes, perennial parasites and hiveperennials, while primordial eggs hatch advanced parasites.
Phase commands
Commands edit the phase and reveal the current one, and an hourglass item provides a quick way to change it.
Primordial reactors
Crafted reactors permanently kill sections of the phayriosis, and a config command can turn the infection off entirely.
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.
Required by 1 mod
How it compares
Phayriosis:Cataclysm is a Forge mod for 1.20.1 – 1.20.6, released under the Apache License 2.0, and it runs on client and server, so it covers a wider version range than this mod. One-Click Parasite Transformation is a Forge mod for 1.20.1 that is server-side only, so players join without installing it, and it is released under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Phayriosis Parasite Infection | Forge | 1.20.1 | Client and server | 2026-10-10 |
| Phayriosis:Cataclysm | Forge | 1.20.1 – 1.20.6 | Client and server | 2026-09-22 |
| One-Click Parasite Transformation | Forge | 1.20.1 | Server-side only | 2025-11-23 |
Questions
Does Phayriosis Parasite Infection need Geckolib?
Does the server need the mod?
Can the infection be stopped?
What the author says
although it will probably auto install them upon downloading:/ Phayriosis is split into multiple phases, the phase will increase over time. The higher the phase, the more powerful creatures spawn and the more they infect, eventually ending with them being able to infect blocks. There is MUCH more planned for this…
Official listing
- Modrinth page
- modrinth.com/mod/phayriosis-parasite-infection
- Owner
- Monbox
- Published
- 2026-03-01
- Updated on Modrinth
- 2026-10-10
- Facts verified
- 2026-10-15
