Boss deletion on chunk unload + Boss despawn timer
1.17 and above the boss looses all of its custom powers when the chunk gets unloaded. Now if a custom mob from the plugin is inside of a chunk the chunks stays loaded forever. Of course if all custom mobs die the chunks gets unloaded. Because of the fact that some unnecessary chunks may stay loaded essentially forever if no one kills the boss I decided to add a Boss despawn timer. This setting CANNOT be disabled. you can set as big as timer as possible but make sure you don't overdo it. The default one is 5 minutes you can change it in the properties section inside of the plugin.