Progressive Mob Wave Activations - PMWA - Day/trigger-based control of mob spawning!

PMWA 2.0

• Added a new powerful feature that lets you limit mob spawning based on distance from the central world coordinates X=0, Z=0. Like with the other conditions, it can send you a chat message when you cross the spawning boundary (entering message and optional exit message, only visible to the individual player who crossed it).
• Added a creative mode item for viewing stored PMWA data regarding the current day, the mobs that have been registered as being killed (and as activating other mobs)
• Fixed an issue where mobs could potentially despawn on world load if they no longer meet the spawn requirements. Once mobs have spawned initially, they should now be unaffected by PMWA from then on (adds a PMWA Boolean NBT tag).