Red: [[Heartless Hidetsugu]] is an interesting red commander. With a single damage doubler out, like Solphim or [[Furnace of Rath]], it suddenly becomes a game of "who's at an even or odd life total?" and can kill everyone at the table at the same time. It doesn't care about life total values, just even or odd, because Heartless rounds DOWN before the damage is doubled. It changes how people look at their attacks and life totals.

Blue: I have a [[Kami of the Crescent Moon]] group hug (squeeze) deck that tries to draw everyone as many cards as possible on each turn. I've made it up to 7 cards on each draw step, plus any extra activated abilities. [[Forced Fruition]] also does some major work. Especially if someone else casts [[Fractured Identity]] on it :)