Puca

The púca (Irish for spirit/ghost; plural púcaí), puca (Old English for goblin), also pwca, pooka, pookah, phouka, and puck, is a creature of Celtic, English, and Channel Islands folklore. Considered to be bringers both of good and bad fortune, they could help or hinder rural and marine communities. Púcaí can have dark or white fur or hair. The creatures were said to be shape-changers that could take the appearance of horses, goats, cats, dogs, and hares. They may also take a human disguise, which includes various animal features, such as animal ears or a tail.