Pageant Legend, by Katy Dröge-Macdonald and Juliane Honisch
Fun fact: one of the writers (I think it was Katy) originally wanted to call this song “Fuck Arthur” but was told she couldn’t do that. So she called it “Pageant Legend,” but nobody remembers that name, so everyone calls it The Morgan Le Fay Song.
And it’s on myspace. How quaint.
Lyrics here.
Pageant Legend (Morgan Le Fay)