Ageing Mobs
This mod allows mobs to age and transform
About this Mod
This mod will allow certain mobs to age under certain conditions, when they reach this condition they will transform in to a different mob.
Mobs that can age by default using this mod:
- Creeper to Charged Creeper
- Zombie to Husk
- Husk to Zombie
- Baby Zombie to Zombie (also Baby Husk to Husk)
- Villager to Vindicator
- Vindicator to Evoker
- Guardian to Elder Guardian
- Endermite to Shulker
- Skeleton to Stray
- Stray to Skeleton
- Rabbit to Killer Rabbit
- Cow to Mooshroom
- Bat to Vex
- Skeleton to bow wielding Wither Skeleton
- Slime to Magma Cube
- Creepers slowly age in thunderstorms, when they reach a certain age they can transform in to a charged creeper
- Zombie ages in hot biomes and will eventually change in to a husk
- Husks will age in cold biomes and will eventually turn in to a zombie
- Baby zombies will age over time eventually allowing them to grow up
- Villagers that are kept in dark places for to long will age and eventually turn in to a vindicator, their age will decrease while they are in light
- Vindicators with magical items near them (Bookshelves, Brewing stands and enchantment tables by default) will age and eventually turn in to a evoker
- Guardians will age over time and after a long time they will turn in to a elder guardian
- endermites will age over time, when you name these creatures they can stay alive much longer and will allow them to age to a point where they can burry themselves in purpur blocks, allowing the purpur block to eventually turn in to a shulker
- Skeletons in cold biomes will age and over time freeze in to a stray
- Strays will age in hot biomes this allows them to convert in to a skeleton
- rabbits left alone in darkness will allow them to age until they reach the feared age and turn in to a killer rabbit
- Cows on top of Mycelium or with mushrooms nearby will age over time and eventually turn in to mooshrooms
- bats will slowly age over time until they eventually transform in to a vex, Be careful while caving!
- Skeletons in the nether will age and eventually burn up to a wither skeleton, their bow still seems to be intact
- Slimes that found their way to the nether will age and over time adapt to the heat of the nether allowing them to turn in to magma cube
CraftTweaker support
Adding new conversions is fairly easily done through CraftTweaker. For info on the CraftTweaker support check the Wiki

For questions feel free to join my Discord.
Want to support us?
Available Versions
How to Install Ageing Mobs on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (26.1).
Install Mod
Open the mod browser in the dashboard and search for "Ageing Mobs". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1, 1.21.11, 1.21.10 (+13 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Ageing Mobs server crashes on startup – what to do?
Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.1). You can switch loaders with one click in the panel.
Is Ageing Mobs compatible with forge and neoforge?
Ageing Mobs officially supports forge, neoforge for Minecraft 26.1, 1.21.11, 1.21.10. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Ageing Mobs – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Ageing Mobs consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Similar Mods
Rent Modded Server
Install Ageing Mobs with just one click on your server.