Mood Contagion
Imagine walking into a sheep pen and, with a single punch, watching the entire flock scatter in terror. Or striking a wolf only to have every nearby predator turn on you with red-eyed fury. That is the chaotic beauty of Mood Contagion, a plugin that injects a hidden emotional layer into every mob on your Minecraft server. No longer are creatures just wandering AI shells—they now feel, react, and spread their moods like a behavioral virus.
What Is Mood Contagion for Minecraft?
Mood Contagion is a lightweight server-side add-on that assigns one of three emotional states to every mob: CALM, PANIC, or RAGE. These moods are not just visual fluff. They change how mobs behave, how they interact with players, and how they influence each other. The plugin works on a simple but brilliant contagion mechanic: an emotional mob can infect nearby mobs of the same type, creating cascading waves of panic or aggression that feel organic and unpredictable.
How Emotional Contagion Works
Each mob stores its current mood and a timestamp in its persistent data container, so emotions survive chunk unloads and server restarts. A background task runs roughly once per second, processing mobs in a round-robin fashion with a per-tick budget to keep performance rock-solid. When a mob is in PANIC or RAGE, it has a configurable chance to spread that mood to same-type neighbors within a defined radius. After a set duration, the mood decays back to CALM, but not before the damage is done.
The Three Emotional States
- CALM – The default state. Mobs behave exactly as vanilla Minecraft intended.
- PANIC – Triggered when a mob is hurt. The mob flees from the nearest player, and its fear is contagious. Hit one cow, and the whole herd bolts. Panicking mobs emit yellow particles, giving you a clear visual cue.
- RAGE – Certain mobs (wolves, bees, and all hostile creatures) enter rage instead of panic when damaged. They move faster, hit harder, and actively target the nearest player. Neutral mobs that normally ignore you will suddenly turn aggressive. Raging mobs glow with red particles, a warning you cannot miss.
Killing a mob also seeds panic in all same-type mobs within range, so even a clean bow shot can send a herd stampeding. The result is a living, breathing ecosystem where every action has a ripple effect.
Commands and Permissions
Mood Contagion keeps things simple with just three commands, all accessible via /moodcontagion or the aliases /mood and /contagion:
/moodcontagion info– Displays the current configuration values. Requiresmoodcontagion.use(default for all players)./moodcontagion here– Counts how many mobs within 16 blocks are in each emotional state. Requiresmoodcontagion.admin(default for operators)./moodcontagion reload– Reloads the configuration file without restarting the server. Requiresmoodcontagion.admin.
Fine-Tuning the Chaos
The config.yml file gives you full control over the contagion mechanics. You can adjust the spread radius, the infection chance per neighbor, the duration of panic and rage, and even the speed and strength boosts applied to emotional mobs. A built-in TPS guard caps the number of mobs processed per tick, so even on crowded servers the plugin stays lightweight. All values are clamped to safe ranges, preventing accidental game-breaking configurations.
Installation and Compatibility
Mood Contagion is built for modern Minecraft server software and supports Paper, Spigot, Bukkit, and Purpur from version 1.21.1 up to 1.21.11. It requires Java 21. To install, simply drop the jar file into your server’s plugins folder and restart. The plugin generates a default config file on first run, so you can tweak settings immediately. If you use the foxygame.net launcher, you can find Mood Contagion in the add-on catalog and install it with one click, automatically matching your server version and keeping it updated. No manual file hunting needed.
Why Download Mood Contagion?
This plugin transforms routine mob interactions into dynamic, server-wide events. A single misstep can spark a stampede or a frenzy, making survival worlds feel more dangerous and multiplayer pranks absolutely hilarious. It is perfect for SMPs, minigame servers, or anyone who wants mobs to feel less like robots and more like a living, reactive part of the world. The performance-conscious design means you can run it on large servers without worrying about TPS drops. Download Mood Contagion today and watch emotions spread like wildfire through your Minecraft world.