• Use vanilla structure system
• Replace some dummy blocks with blocks fitting to the biome
• Add tags to chests in the structure files, then add loots for each tag (maybe by using LootTables)

To extend on this: Structure gen is always time-consuming to implement and especially verify. However, it adds a lot to the game.

Applications

• Use as loot location (chests) for vampire books or generic items. With existing mobs (basic vampire/hunter)
• Host boss fights for loot or tasks (advanced vampire/hunter or new mobs (which??)
• Host other quest giver / quest objects

Implementation

• Check and use/extend vanilla structure system (see first post)
• Probably have to use structures to allow getting the location from the world. Can be use a single feature type or does every type of building require a separate one (mainly for finding)
• Would the implementation differ a lot from 1.16? Then focus on 1.18
• Could crowd-source buildings