Yoda’s destinies: Living energy pours into the Cosmic at death. Force Priestesses keep the well. A Jedi who learns the lesson can appear as a ghost — not a haunt, a remaining. Sith try to cheat the same door with essence transfer and fail into objects. The netherworld is the well’s name for after.
This is not a heaven you can map. Mortis is a household. The well is a current.