Ghost

A Ghost appears as a white sheet with yellow eyes that floats. It is invincible to anything but doomsday weapons, Edison, and blackholes and can be turned to stone. Unless you attack it, it won't attack you. Useful for missions where you have to destroy enemies. Doesn't attack certain beings though. If you create a Coffin or Urn and open it, a Ghost comes out.

If something around the ghost dies by another living thing the ghost attacks the thing

i.e Cthulhu kills a genie next to the ghost the ghost gets mad and kills the Cthulhu but nothing else unless attacked

Trivia
The Ghosts resemble the enemies from the arcade game, "Pac-Man".