Sculk Patches

Sculk Patches are small "sub-biomes"/"semi-biomes" which appear above an ancient city/deep dark biome. There's a 48% chance for it to spawn. These semi-biomes contain all sculk blocks with a 0.3% chance to spawn a shrieker, which is also only possible in mountains or desert or mesa biome, as it will disturb the peace above ground or just because a mob can activate it and summon the warden.

Also requesting return of the sculk jaw.