Mobber
by pirmatovj15
Mobber is a Fabric server mod that spawns random items, mobs and structures at timed intervals, built for chaotic survival play.
What it does
Once the mod is running, it gives or spawns a random item, mob or structure every few seconds, so a world becomes harder to predict. Server owners set the timers with commands, and the intervals are whole numbers of seconds. Messages can be switched on or off with true or false values, which keeps chat quiet when wanted.
The mod fits Chaos SMP events, challenge videos and content creation, where an unpredictable run is the point. Because it only changes the server, players join without installing anything. Mobber needs Fabric Loader and Fabric API, and it is published for 1.21.10 alone, as version 1.0.0 dated 2025-11-14. The code is open source under the MIT License.
Key features
Random items and mobs
Items, mobs and structures are chosen at random and given or spawned during play, including when a player is in the middle of a task.
Command-set timers
Server owners set the interval between events with commands, and every timer value is an integer number of seconds.
Message control
Event messages can be turned on or off with a true or false setting, so a server can keep announcements out of chat.
Survival chaos
The steady stream of surprises turns an ordinary survival world into something unpredictable and often absurd, which suits events and streams.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Chaos SMP events
A server can run a timed event where the random drops and spawns keep every participant guessing.
Challenge videos
Creators can use the mod to build runs where each new minute brings a different item, mob or structure.
Who it’s for: Server owners running events or public chaos worlds, and content creators who make challenge or survival videos. Players join the server without installing the mod.
How it compares
Chaos Structures is open source under the MIT License and is a server-required mod with optional client files, for 1.21.6 – 1.21.11. Random Effects Every Minute uses the client and server environment, also for 1.21.6 – 1.21.11, and is not open source. Chaos Randomizer is client and server, published for 1.21.1 only, and is released under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Mobber | Fabric | 1.21.10 | Server-side only | 2025-11-14 |
| Chaos Structures | Fabric | 1.21.6 – 1.21.11 | Server required, client optional | 2026-06-09 |
| Random Effects Every Minute | Fabric | 1.21.6 – 1.21.11 | Client and server | 2026-06-23 |
| Chaos Randomizer | Fabric | 1.21.1 | Client and server | 2026-06-09 |
Questions
Does Mobber need to be installed on the client?
What does Mobber require?
Can the timers be changed after the server starts?
In the catalog
Mobber is one of 2,135 Minigame mods on ModsFinder, and one of 1,454 Minigame mods for Fabric. 15,569 mods support Minecraft 1.21.10.
More from pirmatovj15
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What the author says
Mobber brings pure chaotic energy into Minecraft by spawning random items, random mobs, and random structures at intervals you choose. Just set the timers with commands and watch the world descend into beautiful nonsense.
Official listing
- Modrinth page
- modrinth.com/mod/mobber
- Owner
- pirmatovj15
- Published
- 2025-11-14
- Updated on Modrinth
- 2025-11-14
- Facts verified
- 2026-10-15