AKA My Little Pony on acid; they not only cause nightmares, they sometimes are night mares. Want to emphasize how Badass a hero or villain is? Simple, given them a truly monstrous looking horse! Standard fare include wings, Red Eyes, Take Warning, horns, fangs, and split hooves (sometimes claws). Horses that are nothing but skeletons are also popular choices for The Undead to ride, and sometimes the horse can appear either to be on fire or leave burning hoofprints. Usually either truly untameable or ridden by villainous characters, but sometimes subverted into being tamed by The Hero. As these days horses are kept mostly for recreation and are often seen as something of oversized pets for little girls, the idea of scary and dangerous horses might seem a bit silly, as they lack any claws or