Would you do me a favour?
I have a job for your cracked mind - Reference to Altain, his alter ego who often comes out in posts.
Something for the sleight tongue - Has gilded tongue rank magic.
And the darkness that you hide - His alter ego is dark. Could also be a coat colour ref as he's mostly black.
Oh but do not worry! It is only a small thing
Something only you can do - Reference to Chancellor position, that has to be specifically appointed.
With your fair locks, ever endearing - DEM LUSCIOUS LOCKS OF HAIR.