MonsterEyes
by landland
MonsterEyes limits when monsters can notice a player, so mobs react only to targets inside their line of sight.
What it does
Monsters following the MonsterEyes rules attack only enemies they can see. The viewing angle is set by the entity attribute monstereyes:field_view, which defaults to 180 degrees and determines the range a mob can recognize. A player who attacks a monster from outside its field of view receives extra damage, a backstab effect controlled by the game rules doBackstabDamage and backstabDamageMultiplier.
The mod is server-side only, so only the server needs it and players join without installing anything. It uses Cloth Config API for its settings screen, and the monstereyes reload command reloads the config without restarting. The source code is public under the MIT License, and the latest Fabric build, 1.2, targets 1.21.4 and was published on 2025-05-12, after a first release on 2025-04-27.
Key features
Line-of-sight targeting
Monsters only pursue or attack enemies within their field of view, rather than sensing players through walls.
Backstab damage
Attacks from outside a monster's field of view deal additional damage, scaled by a configurable multiplier.
Adjustable viewing angle
The field of view is an entity attribute with a default of 180 degrees, which server owners can change per mob.
Live config reload
The monstereyes reload command applies changes to the config file without restarting the server.
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
Stealth-based play
Players can sneak behind monsters to land backstabs, which rewards positioning over direct confrontation.
Harder mob encounters
A narrower field of view makes monsters easier to slip past, while a wider one keeps them alert over more ground.
Who it’s for: Server owners who want mobs to react to what they can actually see, and players who enjoy flanking. Because the mod runs on the server alone, it suits multiplayer worlds where clients should not need changes.
How it compares
Monster Booklet is a Fabric mod for 1.21.1 – 1.21.8, open source under the MIT License, and runs on client and server together. Aggressive Mobs is server-side only like MonsterEyes, open source under the CC0 1.0 Universal license, and published for 1.21.5. Easier Backstabs is client-side only, is not open source, and is published for 1.21.11 under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| MonsterEyes | Fabric | 1.21.4 | Server-side only | 2025-05-12 |
| Monster Booklet | Fabric | 1.21.1 – 1.21.8 | Client and server | 2026-01-18 |
| Aggressive Mobs | Fabric | 1.21.5 | Server-side only | 2025-06-01 |
| Easier Backstabs | Fabric | 1.21.11 | Client-side only | 2026-05-23 |
Questions
Does MonsterEyes need Cloth Config API?
Do players need to install MonsterEyes?
Which game version does MonsterEyes support?
In the catalog
MonsterEyes is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 17,979 mods support Minecraft 1.21.4.
More from landland
Similar mods
What the author says
Very simple fabric mod, monsters now only attack when you are in line of sight It also supports the backstab effect, which deals additional damage when attacking outside of the monster's field of view.
Official listing
- Modrinth page
- modrinth.com/mod/monstereyes
- Owner
- landland
- Published
- 2025-04-27
- Updated on Modrinth
- 2025-05-12
- Facts verified
- 2026-10-15