If you wake up in a field of green grass, looking at a woman of flesh and steel. Be glad, you are dead. If you wake up covered in blood and shit, be gladder still. For you are alive and your time is not yet come!
Cowardly maggots! Bow your thrice cursed heads and thank the goddess that you still draw unworthy breath!
If you want to add a "supernatural" touch to your campaign, define the rules of magic and the universe. Make your players comfortable with those rules. Then your new supernatural creatures must then break those rules.