Authenticity issues aside, there's a very cool song that Graham and Eileen Pratt do: MERLIN'S SONG. It's on the album "Lark in the Clear Air."

Born to an age of reason
Mystery is my name
Mine is the song of seasons
Mine is the ancient dream.
Some men have called me holy,
Others the devils son
I do as much as has always been done.

Magic is all too simple
Mystery all too plain
I have the power of magic
Like clouds have the power of rain
Read me the spell of knowing
Sing me the charm of sleep
Open your eyes and you'll learn where to seek.

Soldiers seek my fortune,
Princes seek my fame,
Wise men seek my friendship
Foolish men seek my name.
Princes have seen my glory,
Harlots will see my fall
I see the end and beginning of all.

Soldiers all wrapped up in armour
Die by the dagger's thrust,
Harlots all wrapped up in envy
Perish for none to trust.
Clothed as I am in magic,
Magic must be my fate,
Silently by my own magic, betrayed.