(( Biological organisms that can change their size, shape, sex, species, etc., at will. Impossibilities, or “Imps” for short, are a species of polymorphs. Their default form is typically a Pegasus, white coat, white mane and tail, and blue eyes. Most change their eye color and mane and tail color at some point in their lives. They were repurposed by an extinct ancient civilization as a pet species, even though they were sapient. The Imps were more than happy to be their pets though, and when “domesticated” (wink wink nudge nudge) they can be one of the most loyal companions possible, especially since they believe that their respective owner(s) can do no wrong, to them or others.