San D'Klass, otherwise known as San the Deluded, was the third king of the Elfin Frond Dynasty, and the truth behind the tales of Santa Claus. His story was found in the Old Testament, a record of the ancient times when humans and fairies coexist, and Artemis Fowl ll stumbles on to it while procuring a method of eluding the time-field's boundaries in Artemis Fowl