Skeleton Castles

A Stone brick castle ruin that spawns in 1.17 with the Skeleton Vanguard from Minecraft Dungeons to guard the ruined castle and its loot. With the castle spawning on the surface and stretching deep underground it would be a good entrance into the new 1.17 caves.

Loot examples: Bane of the Unholy (stronger against arthropods and dead creatures), a new music disk, the skeleton vanguard's spear, God apples, horse armour, etc.

The castle could change blocks depending on what area it is in, mossy stone brick and jungle wood for swamp/jungle, broken stone brick and spruce wood for mountain tops, regular bricks and oak for plains, sandstone bricks for desert etc

much like the bastions there could be different types, one based on treasure, one based on spawners, one based on skeleton horses.