New Cave Biome - Dusky Caves

Dusky caves are a new type of cave biome. They would be pretty dark with less glow lichen spawning but glowing mold colonies on the side of the caves. Loose dirt would make up most of the walls, with them falling like gravel when not attached to other loose soil. Insects would infest the walls with two new mobs: the Moldfly and the Mold Beetle. The Mold fly would be an enlarged passive fly the size of a bee. When killed, would drop “fly juice” this substance can be used to make tranquility potions which would create an entity stop in its place while making them unable to feel pain. The Mold Beetle would be a neutral mob that randomly pulled out items from molds like stone and minerals.