Allows easy region creation and enables you to set a limit to the amount of zombies that can spawn in said region, also has a interval and amount setting to customize zombie spawn speeds
/edit
Gives you a region creation wand
/editregion
Opens region edit menu for modifying Limit, Interval and amount of spawns
/deleteregion
Deletes region you are standing in
Default Limit, Interval and amount are modifyable in ZombieSpawning\chunks.yml Default values are:
DefaultGlobalLimit: 5
DefaultGlobalInterval: 100
DefaultGlobalAmount: 1
Region creation is 2D and Y level does not matter