
Custom 100-Day BOSS
Players can customize the biological entities generated in 100 days
About this Mod
This is a feature allowing players to customize creatures spawned within 100 days.
Players can modify the configuration file in the config folder.
Configuration Content:
List of entity registry names (e.g., "minecraft:zombie", "minecraft:creeper"). Spawns entities sequentially in this order.
entities = ["minecraft:zombie", "minecraft:creeper"]Days between Boss spawns (Min: 5, Max: 100, Default: 10)
days_interval = 10
Whether the Boss spawn feature is enabled
enabled = true
When an entity spawns, you can open the chat bar and click the teleport button to be transported to its location.

Entities will spawn in safe zones—open spaces without obstructions—to prevent phasing into blocks or getting stuck.
This mod supports cross-dimension spawning and works with dimensions from other mods.

In most dimensions, if a safe zone cannot be located, the entity will spawn three blocks above the player's head.
If you wish to disable this feature, you may use commands:
Enable spawning: /100dayboss true
Disable spawning: /100dayboss false
Available Versions
How to Install Custom 100-Day BOSS 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 (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "Custom 100-Day BOSS". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.20.1, 1.19.2 (+1 more)
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Custom 100-Day BOSS 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 (1.21.1). You can switch loaders with one click in the panel.
Is Custom 100-Day BOSS compatible with forge and neoforge?
Custom 100-Day BOSS officially supports forge, neoforge for Minecraft 1.21.1, 1.20.1, 1.19.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Custom 100-Day BOSS – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Custom 100-Day BOSS 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.
Rent Modded Server
Install Custom 100-Day BOSS with just one click on your server.