Health Based Mob Scaling
by SlimeeyYt
Health Based Mob Scaling changes the size of mobs according to their maximum health, so stronger mobs grow larger and weaker ones shrink.
What it does
Each mob's size and step height are tied to its health. A mob with more health grows bigger and climbs higher steps, while a mob with less health shrinks. The scale updates once per second and only applies to mobs close to a player, which keeps the work small on busy worlds. Scale Health is set to 0.25 and Step Height Health to 0.125 by default.
The mod is a Fabric mod for 1.21.11 that requires Fabric API. Either side can run it, and neither needs it, so it can run on a single-player client, on a server, or on both. Commands are not needed, since the scaling happens automatically. The code is open source under the MIT License, and the project has public source code and an issue tracker.
Key features
Health-linked size
Mob size grows with maximum health, so strong mobs become large and weak mobs look small.
Step height scaling
Larger mobs can step over taller blocks, and the step height value follows the same health-based rule.
Nearby-only updates
Only mobs near players are rescaled, and the update runs once per second to limit lag.
Automatic operation
Scaling applies without any command, so the effect runs as soon as the mod is loaded.
Gallery
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
Survival challenge
Players who want tougher encounters can rely on large, high-health mobs that look the part.
Immersive worlds
Varied mob sizes make the world feel less uniform, which suits players who prefer dynamic creatures.
Who it’s for: Players who want mobs to vary in size with their health, and server owners who want the effect without issuing commands. Only Fabric players on 1.21.11 can use the current build.
How it compares
Random Mob Sizes is open source under the MIT License and runs on Fabric, Forge, NeoForge and Quilt for 1.20.5 – 26.3, with a server required and the client optional. Size Randomizer is closed to redistribution under All rights reserved, runs only on Fabric for 1.21.1 – 1.21.11, and needs both client and server. Heart Harvest is server-side only, MIT licensed and limited to 1.21.9 – 1.21.11 on Fabric.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Health Based Mob Scaling | Fabric | 1.21.11 | Client or server, optional | 2026-03-22 |
| Random Mob Sizes | Fabric, Forge, NeoForge and Quilt | 1.20.5 – 26.3 | Server required, client optional | 2026-09-15 |
| Size Randomizer | Fabric | 1.21.1 – 1.21.11 | Client and server | 2026-06-28 |
| Heart Harvest | Fabric | 1.21.9 – 1.21.11 | Server-side only | 2026-04-09 |
Questions
Does Health Based Mob Scaling need Fabric API?
Does the server need the mod?
How often do mobs update their size?
In the catalog
Health Based Mob Scaling 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 SlimeeyYt
Similar mods
What the author says
Bring your world to life with dynamic mob scaling! LifeScale makes every mob's size and movement scale with its health — creating a more immersive and challenging gameplay experience.
Official listing
- Modrinth page
- modrinth.com/mod/health-based-mob-scaling
- Owner
- SlimeeyYt
- Published
- 2026-03-22
- Updated on Modrinth
- 2026-03-22
- Facts verified
- 2026-10-15