The entity boss part seems like it's just an array of objects you perform actions on. It's not a description of the goal of the object, it's an internals-level

The entity boss part seems like it's just an array of objects you perform actions on. It's not a description of the goal of the object, it's an internals-level view of how it does it. Maybe there's another more fundamental behavior or dataset that would suggest a better name? Perhaps Scene or World, depending on the things the EntityManager was doing. If it's reloading them it's like a scene, if it's changing gravity it's more worldy...