Description:

Diamondkeep Citadel is a medium-sized blue castle built primarily from diamond blocks. It features a tall central keep, four round corner towers that rise above crenellated curtain walls, and an arched main gate with a raised portcullis. The interior centers on an open inner courtyard with tiered walkways and stair towers that connect battlements and interior rooms. Accents and trim use complementary blue materials — blue stained glass windows, dark prismarine or lapis trim — and sea lanterns or glowstone for lighting. The design is modular and scalable: rooms, battlements, and towers can be resized while preserving the cohesive diamond-blue aesthetic and radial/symmetric layout.