This Mod is about mostly an entity
You can summon this entity by making a combination of shadow essence and death essence
Shadow Essence is gotten by harvesting shadowbloom which can be found in many places
Death Essence is gotten by killing a villager
If you kill the Possessed Void you will either get 10 Dark Void Frames or Darkness you can use these to make a portal to the Dark Void Dimension, a wasteland of floating islands inhabited by Possessed Voids (lag warning lmao)
CRAFTING RECIPES:
Possessed Shadow Essence:
Possessed Void Spawn Egg:
Dark Void Dimension Portal:
(there's also a "secret" structure)