This is a command for a custom boss command named Zoogster Killer. You can always rename it by you can change the {CustomName:"[your custom name]",Tags:["ZoogsterKiller'] to a different name. Also, if you want the name to pop up in game, then you can do {CustomName:"[your custom name]",CustomNameVisible:1,Tags:["ZoogsterKiller'Tags:["ZoogsterKiller']. I haven't tested it yet so something might go wrong. Also, show your support to MCstacker because I made this command on MCstacker! :D