Tumble Magnet
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Hmm... I guess I completely missed them when looking though the deck :/
What about Guilty Conscience?
Add a Time Sieve. It compliments your Thopter Assembly quite well.
Since it's built for multiplayer, how about blood tithe.
Personal preference, but I would prefer Ornithopers over Memnites because they have flying.
Cards that go well with Isochron scepter for control: Silence, Angel's Grace, Abeyance, and Orim's Chant
What about Stormtide Leviathan?
Maybe Throw in some Broodwardens, Otherwise, the chance of drawing either Coat of Arms or raid bombardment is 1:10. Also, control and boardwipes hurt. Alot.