Serra Avatar would be great in this deck, but I think this deck is great!
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I've never really found Wight of Percent Six useful, because you could mill someone and not knock any creatures out. (Just my opinion on that though). Take out the last thoughts and replace them with Think Twice or something of that sorts. Hidden strings is an ok card but you dont really need 4, especially if you just use paranoid delusions with invisible stalker.
Definitaly need some Breakings in there for sure. 4 Mind Sculpts and 4 Breakings knock out 60 cards total.
The Illuisionist's Bracers do not work. As it says on the card "if it isn't a mana ability, copy it"