Restless Soul Deathrattle

You have willpower potent enough that you can become incorporeal when you are close to death. When you drop to or below zero hit points, you can become a ghost. You still roll death saving throws on your turn, but you can also act as your ghost. Your ghost is still tethered to your body and if you die, your ghost vanishes into the astral plane and you die. You can use this feature once per long rest. In addition, you have advantage on all saving throws made to resist losing control of your body.