If you thought the ghost-filled plot of A Christmas Carol was a bit macabre for the holidays, you may want to steer clear of visiting Iceland anytime in December. Because Charles Dickens’ miserly Ebenezer Scrooge looks downright friendly when compared to Iceland’s meanest Christmas tale: Jólakötturinn, or the child-eating Yule Cat. Jólakötturinn is a black cat the size of a house that roams the Icelandic countryside on Christmas Eve, attacking and eating children who fail to wear at least one new piece of clothing. The Yule Cat is something of…