Ghosts are manifestations of spirits or other entities from other planes of reality. They can appear on Earth by feeding off of energy sources in the environment.
There are many types of ghosts in existence. Some represent only residual energy left behind by powerful magic, while others are spirits of deceased humans reaching out across the fabric of space and time to communicate with the living.
Ghosts are almost always incorporeal. Only the strongest forms of ghosts are capable of attaining a tangible, physical form.
It takes a great deal of energy for ghosts to communicate with the living. Many forms of ghost cannot speak, and special equipment or Summoning magic may be necessary to communicate with those that can.
Below is a list of creatures with the Ghost keyword.