Demon Fortress
mna:faction/demon_fortress
Biomes
Demon Fortress generates in these biomes and biome tags:
#minecraft:is_netherPlacement
Demon Fortress: the world places one attempt in every 25×25-chunk region, at least 20 chunks apart; it shares its placement set with other structures (weight 1).
Mob spawning
This structure overrides spawning for: monster.