Harmful Gas

This mod requires:

• Fabric API
  

This mod adds gas to your Minecraft world. It will consume the environment around itself and eliminate any players inside itself, while following you around.

There are a few commands to help you out:

/harmfulgas start starts the gas, at world spawn.

/harmfulgas pause pauses the gas.

/harmfulgas resume resumes the gas.

/harmfulgas speed <speed> changes its propagation speed (the higher, the slower).

Go check out TommyInnit’s video on this!

And for a more objective approach, see the following.