Astrakinesis- the ability to manipulate astral energy.
In other words....They can create, manipulate, etc. astral energy. They can travel the astral plane and see spirits, interact with spirits, and make spirits visible to others, and astral trapping. They can leave their bodies for a short period of time as a spirit, and as a spirit no human can see them, hear them, touch them, or anything. They can walk through solid objects in spirit form as well, but the catch is they can only be out of their bodies for a limited amount of time or their physical body will die. Your physical body does not disappear when you're spirit walking, but it will appear to be dead, and humans can see it. There are very few characters in the comics with this ability, so I think it would be an awesome superpower to give a character in your book. People with this ability are called Astrakinetics.
