Ok so hear me out. Once you conquered a dungeon (skeleton ps: maybe add diferent mob dungeons?) You get the option to claim it. Once claimed you are allowed to change the corridors however you wish to make a custom dungeon. You can also create custom npc to guard certain spots and you can give them some of your lvls in something for them to gain that amount of it. You can equip them as well. You also get some spawners. You can also upgrade the dungeon with gold.
The amount of spawners, corridors, custom nps etc… Will have a max so you cant create how many nps'c you want. Dungeons get harder the longer away from the middle of the map you are the more max data you are given. With different types of dungeons that spawn different thing e.g a slime dungeon would give you slime spawners.
This would be a great thing if a BIG server was ever created. Becuase the higher level you are the more you would not like a trash dunegon by spawn.
This Idea was mainly taken inspiration from the Overlord series. But I think many woulkd enjoy things like guild wars. Maybe even the creator of the mod would add custom events.
This was just and idea ive had in my head for a while. What do you guys think?