The creature defined in my poem is a women, her aim is to **** the Persia king Xerxes.  According to the history books Xerxes was actually murdered by Artabanus, the commander of the royal forces.  So in my fictional story Artabanus employs the help of a female doctor to **** the king.  Quacksalver is a term referring to someone who falsely claims to be a doctor; in this case it is the beautiful women.
If you notice the very odd form to my poem - the first word begins with an A and the 3 words begins with a B and so on.  In the opposite fashion the second word begins with a Z, and the fourth with a Y and continues with every even word doing the alphabet backwards.  The poem finally ends when the forward alphabet choice and the backward alphabet hit at M.