Citadel
irons_spellbooks:citadel
Biomes
Citadel generates in these biomes and biome tags:
#minecraft:has_structure/bastion_remnantPlacement
Citadel: the world places one attempt in every 100×100-chunk region, at least 80 chunks apart; it shares its placement set with other structures (weight 1).
Mob spawning
This structure overrides spawning for: ambient, axolotls, creature, misc, monster, underground_water_creature, water_ambient, water_creature.