the Puca is a mischievous shapeshifter. While a benevolent being, the puca does enjoy terrifying and confounding humans, merely for pleasure.They can change between both human and animal forms, though folklore suggests it prefers animal shapes. In human form, they can be identified by having tail or ears. The puca is particularly fond of appearing to humans as a black horse, however, if a person tries to ride the puca it will find itself being taken for a wild ride and have a hate for most life