Oberon

Oberon is the king and creator of the fairies. A race of magical beings, fairies come from Avalon, a dimension separate from Earth. In Avalon, according to Gilda, a good fairy, there also exists a fairy Tribunal, which her former master, a LARPer who had bound her to his will, would be brought before. It is not known if Oberon leads this tribunal, and his actual power, abilities, origin and appearance have not been revealed. Considering that he created the powerful fairies and the Inner Key Of Oz (Which is able to split souls, something that not even Death could do), he could be considered as a being of unimaginable nigh omnipotent power.

Powers

 * Nigh-Omnipotence - Oberon possessed an incredible amount of power, shown by the fact that he is the creator of the entire race of the fairies (which contain multiple species), and the Keys to Oz.
 * Immortality - as the fairy world have existed for centuries and that Oberon is his king since the beginning, he is most likely immortal.
 * Conjuring - he have created the fairies and the Keys to Oz.

Lore

 * The idea of Oberon being king of the fairies dates back to the 13th Century.
 * Such an idea was popularised by Shakespare including him as a character in his play, "A Midsummer Nights Dream" in which the King is having relationship issues with his queen Titania.
 * Oberon´s (Auberon in French) name and status as fairy king comes from Alberich (alb - "elf" and rih - "ruler, king), a character of the German mythology.

Appearances

 * Season 6
 * Clap Your Hands If You Believe (mentioned only)

Trivia

 * The fact that Oberon have created every fairies, means that is the first of them and that he is the first habitant (and maybe the creator) of Avalon.