The movie reference is from Excalibur, the movie; it refers to the Holy Grail, which is being searched for by all the knights to revive Arthur and Camelot, while his Sister, Morgana, tries to destroy the Kingdom via Arthur's illegitimate son. When a "worthy" knight finds the grail and answers the question "whom does it serve" correctly, he gets to take it back to Arthur so Arthur can drink from it. The voice booms out from nowhere; there is no character asssociated with it, as I recall (it has been MANY years since I saw the movie!!)
Do I win?
