They look like Terraria Mummys, it's palettes are taken from the Spectral Mummy and it looks like a normal Mummy, it has dark blue eyes.
They appear in several Ghost Houses and Haunted levels
The sounds they make is moaning, that means if the player hears it, that means there is a Spirit Mummy
- Spirit Mummys are not one of the species of ghosts as they look solid and easy to defeat.
- Mummys do not have spirits of their own as they are undead beings, but this monster is a ghost version of a mummy
- Somehow, E. Gadd calls these creatures "Ghost Mummy" because when jumped on, they will disapear leaving behind smoke and reappear after 5 seconds.