Is there a way to add new Dungeons to the world generation and have MM spawn in there?

Hey,

Im looking for a way to add things like villages and strongholds to the world generation. I want a big dungeon with a couple rooms of normal enemies and at the end a boss fight. Is there a plugin that allows me to do so?

Add a schematic to the world generation for example and say that in this room that mm Mob should spawn.