Chadius: TOA magic monsters
Intro
Nightmare
A Nightmare is an accumulation of intense fear. It looks like a mass of sharp, black tentacles.
These creatures are very rare and tend to stay in low-populated regions. The best explanation is that they are born of intense hatred from small groups of people. A village curse or superstition could bear a Nightmare. So could intense greed and envy among miners. A Nightmare does not travel from its birthplace.
Nightmares feeds off of people's souls, through fear and anguish. When a victim is close enough, the Nightmare forces the victim to experience a terrible Nightmare and devours it. Anyone who is strong-willed may enter a benign dreamscape, where they may physically waste away. Some minds are simply too foreign for a Nightmare to handle, and will quickly break the dreamworld.