If we shadows have offended
Think but this, and all is mended:
That you have but slumbered here,
While this visions did appear;
Sand this weak and idle theme,
No more yielding but a dream...

[William Shakespeare, A Midsummer Night's Dream, Puck, Act 5, Scene 1]

The King of Elf's, Oberon, appeared first in medieval literature is best known from William Shakespeare's Midsummer Night's Dream. He possesses great magical powers. In Shakespeare's play he is causing a lot of trouble the magical kingdom and the human world when he uses those powers in a fight with his Queen Titania. Puck, aka Robin Goodfellow in English folklore is Oberon?s jester and servant in Shakespeare's play.