This was a brilliant pastiche of most excellent source material. Your interpretation was sublime! The biggest challenge is to make it fresh, and you succeeded beyond my wildest expectations.
Harry in here was still recognizably Harry, but you turned him into an assassin, and made me believe it; I could see how he turned mercenary, to get a little control over his life.
Snape...what is there to say? Brilliant, brilliant, brilliant. I loved him all the way through. Bitter, vicious, and manipulative; through it all, faithful. He was perfect.
Add in the wonderful spin on Grosse Pointe Blank, Trogdor, Monty Python references, and the twist with the Chamber of Secrets & Dolores Umbridge, and I am sure to read this over and over and over again.
Thanks for a story that made me smile, laugh, gasp and cheer.