Sculk

Sculk is a mysterious mold-adjacent hivemind organism found in the world of the Birdhouse. It spreads by rapidly converting the souls of dying entities to itself, infecting nearby blocks and spreading out in veins. It's found natively in the deep dark biome.

The following blocks are all part of the sculk family:

• Sculk: A squishy block that makes up most of the deep dark.
• Sculk Sensors: A specialized appendage that detects sound through vibrations. When it detects sound, its tendrils will click and produce a redstone pulse.
• Sculk Catalysts: The reproductive organs of sculk colonies. When an entity dies around it, it converts the dropped EXP into more sculk.
• Sculk Shriekers: The defense mechanism of sculk colonies. They react to the clicking produced by sculk sensors, and produce an ear-piercing shrieking sound. These blocks are capable of summoning the Warden if triggered enough times in succession.
• Sculk Veins: Smaller parts of the colony that extend outwards from nearby sculk blocks.