If you didn't know the sophisticated people behind the mating, you might imagine that Puca went to Good Magic on no better premise than to double down on the alchemy implicit in both names. Because a puca (or pooka) in folklore is a shape-changing sprite, capable of bringing good or bad fortune. Shakespeare named Puck accordingly in A Midsummer Night's Dream, but my favourite example is Elwood P. Dowd's invisible drinking buddy Harvey, a rabbit standing just under six feet four inches. Perhaps you've noticed his silhouette at Harvey's Bar...