A very simple plugin that allows you to modify the speed of zombie creatures.
The plugin has been made for my modpack Zombie Wasteland and supports all modded entities with ZOMBIE in their name.
Magma (Spigot/Forge) Zombie Wasteland (Modpack)
Code (YAML):
settings: # Speed modifier (1.5 --> 1.5 times faster) modifier: 1.5
# Prints a debug message on every modification debug: false