Deep Dark

The deep dark is a cave biome that generates deep underground in the Overworld.

Description
The deep dark is an Overworld biome that generates deep underground (below Y = 0), usually in mountainous areas with high continentalness. The floor in this biome often has patches of sculk blocks surrounded by sculk veins, which include sculk-related blocks such as sculk shriekers, sculk sensors and sculk catalysts. No mobs spawn in this biome, but if a player triggers a sculk shrieker a certain amount of times, the warden may appear, giving the player the Darkness effect. This is the only biome where ancient cities can generate. Mineshafts and glow lichen can't generate in this biome.