The Nominees are....

"Because a jeweled goblet fell out of my monk's robes after I had presented the fake hair of St.Margaret to Queen Mary."
(Amanda, Thick as Thieves)

"It's not like I killed him... It's more like Immortus Interruptus."
(Nick, Immunity)

"Welcome to my world."
(Amanda, The Devil You Know)

"You have practically made an artform out of killing and you won't help me now?"
(Nick, The Ex-Files)

"You make me feel like a tiny mushroom: you keep me in the dark and feed me horse manure."
(Bert, The Rogue)

and the winner is.....