This is a Minecraft plugin with some utilities to help with making mob farms and spawn-proofing the surrounding area. This plugin adds a command to draw a sphere around a player (or spawn radius around an afk platform) and a utility to display spawnable blocks around the player. It also adds a command to search the nether roof for a 3x3x3 bedrock "cage" for fighting the wither.

Spheres
Summons a particle sphere at the player's location

• radius: number, sphere's radius
• semisphere?: true or false, only render the bottom half of the sphere
• force visible?: true or false, force particle visibility at any range (by default particles are only visible from ~30 blocks)

This is useful for visualizing a spawn radius around an afk platform, simply run "/mksphere 128 true".

Use "/cancelspheres" to despawn summoned spheres, and a server operator can use "/cancelspheres all" to remove every particle sphere.

Spawn Visualization

"/showspawn" will visualize spawnable spaces around the player. Green particles represent safe blocks and white firework trails represent spawnable spaces.

Running "/showspawn" again will stop showing spawnable spaces.

"/showspawn" can also take a light level argument. Light level can be an integer 0-15 or "any". This is helpful for the nether which has complicated spawn rules. Running "/showspawn [light level]" will update the current visualization's light level instead of cancelling the current visualization.

Wither Cage Finder

"/locatebedrockcage" will scan the area surrounding the player and locate a 3x3x3 bedrock cube in the nether. This formation is useful as a cage to trap and kill a wither.

Permissions

The plugin provides the following permission nodes:
Please check out the gallery below for demos and the README on GitHub for more info.