The Murk - Darkness Consumes

The mod turns darkness into a threat. When a player stands in low light levels, a timer starts; below light level 3, the timer runs out after 15 seconds and a warning message appears 5 seconds beforehand. Once it runs out, the Murk's Grasp status effect is applied, shown with a purple tint, which lowers movement speed by 15% and deals damage that grows the longer the player remains in the dark. Entering a lit area does not end the effect at once: it persists for a configurable duration, and an optional Blindness effect can be added.

Light is detected dynamically. Held items, dropped items and items in Trinkets slots count as light sources, and nearby players' light sources reset the darkness timer. Light sources are configurable, with customizable luminance and water sensitivity. When LambDynamicLights is installed, the mod checks realistic light, which requires line-of-sight to light-emitting items.

The Murk is a Fabric mod for Minecraft 1.20.1 – 26.3, released under the MIT License and open source. It needs Cloth Config API. Mod Menu and Trinkets Updated are optional, and the environment is client and server, so the server and every player need it. Snapshot builds are not listed for this mod.