- Modify Creeper's fuse ticks and its jump height.
- Add a filter based on entity's location: location in the world, under sun
- Restrict entities' despawn (setRemoveWhenFarAway). Investigate a possibility to move such specific entities and limit their number.
- Implement specific properties of LivingEntities: powered creeper; horse's jump strength, domestication, style, variant, armor and saddle; saddled pig; angry bunny; baby zombie.
- Unique flag: don't apply two handlers with the same value of this flag. This flag should replace filter's probability with a system of weights.