It is important to note that attacking creatures can only attack your rival
This makes her a little tricky to remove, both because it requires opponents to invest more mana into getting her off the battlefield and because it forces them to spend their own life to do so
That means you get the sweet sweet music of multiple lands for landfall decks, or even something like Flight of Fancy netting you four cards
Further Upgrades The first cards I'd pick up to further juice up the deck would be untapped mana-fixing lands: Watery Grave, Shipwreck Marsh, Underground River, Morphic Pool, Darkslick Shores, Polluted Delta, Sunken Ruins, Undercity Sewers, Urborg, Tomb of Yawgmoth and then maybe a couple more Island / Swamp fetches
I think it is good to understand library size as a resource, even if we wish to minimize it most of the time