The Slayer's Villanelle

In the latest chapter of  My Life Twice Closed by anaross, Buffy composed The Slayer's Villanelle (I think it's lovely and so is the story even if it's - gasp -Spuffy):
 
Death is my art. I make it every day
With my hands. I shape form into dust
And dust into death, and it blows away.

All color around me turns to gray
Then back to color, the color of rust.
Death is my art. I make it every day.

Every thing in the darkness is my prey--
I do what I do, I do what I must.
Turn dust into death, and it blows away.

There's no right or wrong when I slay.
I do what I do, I do what I must.
Death is my art. I make it every day.

Day turns to night, the time to pray.
I'm alone in the dark, no one to trust.
Death is my art. I make it every day--
Make death into dust, and it blows away.