Ghosts are spiritual beings that can render themselves intangible and pass through walls. They often inhabited abandoned houses. It's said that if someone is angry enough even after death, their spirit will live on in the form of a ghost.
Scrutinous mentioned that there are such thing as ghost trains but they can only harm ghosts.
- Anathem Mire was a ghost who lived under Gordon Edgley's mansion. He possessed Black Crystals that powered the Sceptre of the Ancients.
- Warlocks were also known to punish people by creating ghosts towns. Wolfsong was an example in which the inhabitants (such as Trebuchet and Griff) were killed and brought back as ghosts.
- The Munchkin Army was once known as the League of Ghosts. This, however, may refer to the underground nature of the group and not their corporeal form.