Mob Mutator

Mob Mutator is a utility for modifying, balancing, and randomizing the physical, attribute, behavioral, and fun properties of any living entity in Minecraft, including players.

Examples of possible changes to mobs:

This mod is experimental, and its future support is uncertain.

Warning!

Modifying fundamental entity attributes and AI behaviors can lead to heavily disrupted game difficulty, erratic entity movement, or unstable world performance. Always back up your world before making major modifications, even if the change seems minor or insignificant. Extreme parameters (such as excessively high movement speeds or massive explosion multipliers on death) can cause unintended gameplay side-effects.

Key Features:

• Real-time Editing: Fine-tune mob properties (including players and entities from other mods) directly in-game via an interactive, tab-categorized graphical menu (default key is M).
• Multi-Selection & Batch Actions: Select multiple mobs with checkbox-style checkmarks (✔) to randomize or reset them in batches. Double-click any mob in the list to instantly open its detailed editor.
• Global Random: Instantly shuffle entity properties globally using the customizable randomizer to create a chaotic, challenging, or completely "cursed" world. Features category-specific random toggles and intelligent balance constraints (such as a controlled 10% chance for invisibility or creeper explosions) to preserve playability.
• Dynamic Size & Scale Scaling: Make mobs gigantic (up to 10x) or microscopic (0.1x) using the built-in scale attribute. Scale updates apply instantly to the model, bounding boxes, hitboxes, and stats of nearby entities and your own player.
• Custom & Fun Behaviors: Toggle advanced fun parameters like Exploding Creeper Mode (entities explode near targets), Frostbite Attacks (freeze targets on hit), life-stealing Vampirism, high-velocity Tornado Strikes (fling victims horizontally), Sun Healing, or Water Sensitivity (take drowning damage in rain/water).
• Visual and Physics Overrides: Customize gravity multipliers (simulate low-gravity moon jumps), step height (climb full blocks without jumping), safe falling distances, silent modes, and continuous contour glowing outlines.
• Modded Entity Support: Since the mod works directly with the game's registry at runtime, you can customize and modify properties of almost any creature introduced by other installed mods.
• Developer API: Includes an API (MobMutatorAPI) allowing other developers to register custom properties, sync them across network payloads, and auto-render them in the editor in a single line of code.
• Multiplayer Synchronization: Automatically transmit and apply modified attributes from the server to all connected players on the fly, with server profile configuration restricted to server administrators.
• Profile Manager: Quickly save and load attribute presets, integrate with singleplayer world save folders, and automatically restore vanilla parameters upon exiting the game.**

And much more!