Dagda

Dagda is the "all-father" of the Celtic pantheon and one of the most powerful deities known to exist - having a seat in the Council of Godheads he often converses with other higher deities on matters of the greatest importance and has been known to be extremely active in the defence of mortals, often being compared to Odin or Perun but having a ruling style all of his own as well as a unique personality that is generally well-liked amongst the "gods" as he shows respect to those that do good and holds a strong desire to punish those who deliberately do wrong.

Dagda was a prolific god in the Arthurian time-period, indeed legend has it that Dagda was responsible for training the man who would become Merlin in the ways of magic so as to prepare Camelot for its fall and eventual rebirth as Avalon.

Dagda is also known to be connect in some way to the "Once and Future King " entity - possibly being the true "God" of Avalon (though this is heavily debated).