Nightmare (monster)

A Nightmare is a creature of pure thought that is created by some kinds of barrier magic. They are the physical manifestations of thoughts of those trapped within the barrier. One who is very powerful may be able to control them.

They wear all black and have a blank white mask covering their face. They have been known to inflict TAKE THAT and LETHAL. They also seem to be immune to most calls.

They are not intelligent.

Anomalies
Once, during Annabel Hatter's Tea Party, a Nightmare appeared dressed in white rather than black. Rather than doing anything unpleasant, it healed wounds and cured sickness. The guests called it a Dream.

Nobody knows what causes Dreams.