What remained of the belief in elves in German folklore was that they were mischievous pranksters that could cause disease to cattle and people, and bring bad dreams to sleepers. The German word for nightmare, Albtraum, means "elf dream". The archaic form Albdruck means "elf pressure"; it was believed that nightmares are a result of an elf sitting on the dreamer's chest.
German folklore held that elves had a particular fondness for children and would appear to those about to die, rather like the Irish banshee. This aspect of the legend was immortalised by Goethe in his poem Der Erlknig, later set to music by Schubert.
There are also in the Heimskringla notions about a line of local kings who rule over lfheim, situated between the Gautelfr and the present border between Norway and Sweden on the Swedish westcoast. The last king is named Gandalf.The influence of Shakespeare and Michael Drayton made the use of elf and fairy for very small beings the norm. In Victorian literature, elves usually appeared in illustrations as tiny men and women with pointed ears and stocking caps. There were exceptions, such as the full-sized elves who appear in Lord Dunsany's The King of Elfland's Daughter.In 1954, Poul Anderson introduced grim Norse-style elves in his fantasy novel The Broken Sword and made them full-sized.The Harry Potter book series by J. K. Rowling features house-elves that resemble brownies or goblins more than modern high-fantasy elves. Rather like the elves in The Shoemaker & the Elves, Rowling's house-elves are released from servitude when they are given clothes.In the Nordic countries where elves have since become associated with Christmas, elves are clad all in red and have long beards and black boots. On Christmas Eve, one must give the elves a bowl of porridge to keep them from playing pranks. In Iceland, from December 12 until Christmas Eve, thirteen elves called the Yule lads visit homes, a lad each day for 13 days, and play tricks on the children, as well as leaving presents for them.In Scandinavian folklore, which is a later blend of Norse mythology and elements of Christian mythology, there are several groups of human-like nature spirits than are akin to "elves" in a modern sense. These are called tomtar, vittror, and lvor, and are grouped under the general name of vttar (compare wights).English folktales of the early modern period typically portray elves as small, elusive people with mischievous personalities (see illustration). They are not evil but might annoy humans or interfere in their affairs. They are sometimes said to be invisible. In this tradition, elves became more or less synonymous with the fairies that originated from native British mythology, for example, the Welsh Ellyll (plural Ellyllon) and Y Dynon Bach Tg.Christopher Paolini's Eragon also features elves of a Nordic persuasion.
