Thanks a lot for commenting. I have been trying to fit more Venser and Wall of Omens. Maybe I could take out the little Jaces, but they work well as a simple card draw engine that can be brought back with Sun Titan and reset with Venser. Elesh Norn is a game ender. It kills all of your opponent's creatures without at least 3 toughness on the spot, in addition to accelerating the damage dealt by you each turn. However, I might take him and the Jaces out in favor of a strategy more focused on Venser. I did consider Consecrated Sphinx, but I prefer card draw early in the game. By the time I get to six mana, I'd rather be dropping game-ending bombs. But once again, thanks a lot for the comment! It's very much appreciated!
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The Leyline may help more, actually. I've been trying to fit those into my own deck. The problem is that you won't get it out until at least turn four if it's not in your opening hand. Kor Firewalker provides you with a cheap creature they can't get rid of, plus the life gain effect buys you some time. However, it might not defend you as much as the Leyline would. I would do testing with both and see what you like best.
Pretty interesting. I also attempted a blue/white control build without big Jace that was actually fairly similar to this. I'm still tweaking and haven't tested yet, but I sideboarded Revoke Existence for Tempered Steel and Kor Firewalker for RDW. I also threw a few Torpor Orbs in the sideboard to combat Splinter Twin decks. Here it is if you're curious: http://www.mtgvault.com/ViewDeck.aspx?DeckID=193688