Imagine that there's no mobs around players... but zombies. Zombies, zombies and zombies. This plugin is disables a natural mob-spawning and replace all mob spawned naturally with a zombie (or group of zombie).
There's no any commands and permissions. You need to configure plugin once and restart server
zombie-configuration: min-health: 30 # Min value of zombie health max-health: 50 # Max value of zomibie health potion-effects: # List of random potion effects (one line will used randomly) - REGENERATION:1; INCREASE_DAMAGE:5 - SPEED:3 group-spawn-max-amount-of-zombies: 5 # Max amount of zombie in group (choose 1 to one zombie) mobs-allowed-to-spawn: # List of mobs that will spawn noramlly - COW - PIG - BAT - HORSE - CHICKEN