Mirror

A basic Mirror is an infamous entity in many people's dreams. It seems to want to display anything but your normal reflection. The results range from odd to horrific.

Behavior
Mirrors are mischievous, their displays can actively change as stress levels rise. Mild cases include missing facial features, appearing as someone else, slight proportional changes, not seeing a reflection at all, or even a positive reflection showing how the dreamer would like to look. Extreme cases include horrific distortion/disfigurement, disease, the presence of a Mare behind the dreamer, or an ugly, dysphoric version of the dreamer that can be based on their own issues with self image. It's not impossible to simply see a normal reflection, but it isn't incredibly common either.