Random Mob Challenge
by RemyEliot
Random Mob Challenge spawns a mob near each player at a fixed tick interval, so danger keeps arriving on a timer rather than when the player chooses.
What it does
Each player gets a mob spawned close to them on a set schedule. The time between spawns is configurable, and a Start Challenge command begins the run while a toggle turns the mod off. Minecraft runs 20 ticks per second, so an interval of 400 ticks produces a new mob about every 20 seconds, and an interval of 20 ticks produces one each second. Shorter intervals suit a chaotic survival test, while longer ones leave room to build.
Random Mob Challenge needs Fabric API on Fabric, and it is published only for Fabric, for 1.21.11. It runs on client and server, so the server and every player need it, and the code is covered by a custom license that is not open source. Public links exist for the source code and the issue tracker.
Key features
Timed mob spawns
A mob appears next to each player at an interval measured in ticks, so the pace of threats is predictable in length but not in type.
Start command
A command starts the challenge, so the run begins only when the player or server owner is ready.
On and off toggle
The challenge can be switched off at any point, which stops new spawns without removing the mod.
Adjustable interval
The spacing between spawns is set by the interval value, letting one setting produce a gentle or an intense run.
Unpredictable gameplay
Mob types are chosen at random, which adds variety to each run and keeps the danger close at hand.
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 1
Use cases
Chaotic survival runs
A player who wants constant pressure in a survival world can set a short interval and start the challenge.
Hardcore streams
A streamer who wants a different hardcore run can set the spawn timer so that mobs keep arriving unpredictably on camera.
Who it’s for: Players who want constant pressure in survival or hardcore worlds, and server owners who run a shared challenge. Installation is needed on both sides, so servers that host it must run the mod too.
How it compares
Random drop mod is server-side only, not open source and published for Fabric 1.21.11, so players can join without installing it. Jungle's Air Challenge is also server-side only under the MIT License, open source and built for Fabric 1.21.11, while Danielmas Mod 1 is open source under the MIT License for Fabric 1.21.10 and runs on client and server.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Random Mob Challenge | Fabric | 1.21.11 | Client and server | 2026-03-16 |
| Random drop mod | Fabric | 1.21.11 | Server-side only | 2026-05-14 |
| Jungle's Air Challenge | Fabric | 1.21.11 | Server-side only | 2026-02-19 |
| Danielmas Mod 1 | Fabric | 1.21.10 | Client and server | 2025-12-15 |
Questions
Does Random Mob Challenge need Fabric API?
Does the server need the mod?
How is the spawn rate set?
In the catalog
Random Mob Challenge is one of 7,555 Cursed mods on ModsFinder, and one of 4,235 Cursed mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from RemyEliot
Similar mods
What the author says
Ready to turn your world into a chaotic survival test? Random Mob Challenge is a lightweight but intense mod that ensures danger is always just a few ticks away. : Toggles the mod on or off. Use this when you need a break or if things get too crowded. With this Command, you also need to Start the Challenge.
Official listing
- Modrinth page
- modrinth.com/mod/random-mob-challenge
- Owner
- RemyEliot
- Published
- 2026-03-16
- Updated on Modrinth
- 2026-03-16
- Facts verified
- 2026-10-15