Skelepathy
Free me from this flesh, brother
In DnD it’s because most undead are damned and tortured souls enslaved by dark magic to the bidding of their twisted masters.
The skellingtons are looking at you, the real you, the core of your very existence with their soul eyeballs. And they hate you, because you are alive, and they aren’t just dead, they’re being tortured every moment of their existence.
But, hey, tell me more about your perfect medieval civilization built on raising zombie field hands.
/Jokekilling
It’s a very simple matter 2 and maybe mind 3 effect, for simple commands and routines. No ghosts involved!
You know how their jumble of bones pulls together when you get close? Their bones wanna do that with your bones, and the osteonetic attraction that pulls their bones together let’s them know where your bones are, too.
So all you would have to do to avoid this fate would be to pull out your own bones from your body, interesting…
The same way they’re able to take human shape and move instead of sitting in a pile…
Shit, some of them talk